John Fleng Steffensen

The rostral micro-tooth morphology of blue marlin, Makaira nigricans

Pacher, K., Breuker, M., Hansen, M. J., Kurvers, R. H. J. M., Häge, J., Dhellemmes, F., Domenici, P., Steffensen, John Fleng, Krause, S., Hildebrandt, T., Fritsch, G., Bach, P., Sabarros, P. S., Zaslansky, P., Mahlow, K., Müller, J., Armas, R. G., Ortiz, H. V., Galván-Magaña, F. & Krause, J., 2024, In: Journal of Fish Biology. 104, 3, p. 713-722 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

A novel protocol for rapid deployment of heart rate data storage tags in Atlantic bluefin tuna Thunnus thynnus reveals cardiac responses to temperature and feeding

Rouyer, T., Bonhommeau, S., Bernard, S., Kerzerho, V., Derridj, O., Bjarnason, Allal, H., Steffensen, John Fleng, Deguara, S., Wendling, B., Bal, G., Thambithurai, D. & Mckenzie, D. J., 2023, (E-pub ahead of print) In: Journal of Fish Biology.

Research output: Contribution to journal › Journal article › Research › peer-review

Bowhead NEIL1: molecular cloning, characterization, and enzymatic properties

Holm, S., Larsen, R. M., Holst, C. M., Heide-Jørgensen, M. P., Steffensen, John Fleng, Stevnsner, T. & Larsen, K., 2023, In: Biochimie. 206, p. 136-149 14 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Model of Oxygen Conditions within Aquaculture Sea Cages

Bergsson, H., Svendsen, M. B. S. & Steffensen, John Fleng, 2023, In: Biology. 12, 11, 17 p., 1408.

Research output: Contribution to journal › Journal article › Research › peer-review

Physiological effects of temperature on Greenland halibut Reinhardtius hippoglossoides shows high vulnerability of Arctic stenotherms to global warming

Ruth, A., Svendsen, M. B. S., Nygaard, R., Christensen, E. A. F., Bushnell, P. G. & Steffensen, John Fleng, 2023, In: Journal of Fish Biology. 103, 3, p. 675-683 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The Influence of Body Size on Behavioral Thermal Preference in Atlantic Cod (Gadus morhua): Larger Fish Favor Colder Waters

Schakmann, M., Christensen, E. A. F., Steffensen, John Fleng & Svendsen, M. B. S., 2023, In: Fishes. 8, 12, 11 p., 596.

Research output: Contribution to journal › Journal article › Research › peer-review

Escaping from multiple visual threats: modulation of escape responses in Pacific staghorn sculpin (Leptocottus armatus)

Kimura, H., Pfalzgraff, T., Levet, M., Kawabata, Y., Steffensen, John Fleng, Johansen, J. L. & Domenici, P., 2022, In: The Journal of Experimental Biology. 225, 9, 9 p., jeb243328.

Research output: Contribution to journal › Journal article › Research › peer-review

Lacunae rostralis: A new structure on the rostrum of sailfish Istiophorus platypterus

Häge, J., Hansen, M. J., Pacher, K., Dhellemmes, F., Domenici, P., Steffensen, John Fleng, Breuker, M., Krause, S., Hildebrandt, T. B., Fritsch, G., Bach, P., Sabarros, P. S., Zaslansky, P., Mahlow, K., Schauer, M., Müller, J. & Krause, J., 2022, In: Journal of Fish Biology. 100, 5, p. 1205-1213 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Intraspecific variation in thermal tolerance differs between tropical and temperate fishes

Nati, J. J. H., Svendsen, M. B. S., Marras, S., Killen, S. S., Steffensen, John Fleng, McKenzie, D. J. & Domenici, P., 2021, In: Scientific Reports. 11, 8 p., 21272.

Research output: Contribution to journal › Journal article › Research › peer-review

Latency of mechanically stimulated escape responses in the Pacific spiny dogfish, Squalus suckleyi

Schakmann, M., Becker, V., Søgaard, M., Johansen, J. L., Steffensen, John Fleng & Domenici, P., 2021, In: Journal of Experimental Biology. 224, 6 p., jeb230698.

Research output: Contribution to journal › Journal article › Research › peer-review

Population ecology, growth, and physico-chemical habitat of anadromous European perch Perca fluviatilis

Christensen, E. A. F., Svendsen, M. B. S. & Steffensen, John Fleng, 2021, In: Estuarine, Coastal and Shelf Science. 249, 8 p., 107091.

Research output: Contribution to journal › Journal article › Research › peer-review

Regulate or tolerate: Thermal strategy of a coral reef flat resident, the epaulette shark, Hemiscyllium ocellatum

Nay, T. J., Longbottom, R. J., Gervais, C. R., Johansen, J. L., Steffensen, John Fleng, Rummer, J. L. & Hoey, A. S., 2021, In: Journal of Fish Biology. 98, 3, p. 723-732 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Shuttle-box systems for studying preferred environmental ranges by aquatic animals

Christensen, E. A. F., Andersen, L. E. J., Bergsson, H., Steffensen, John Fleng & Killen, S. S., 2021, In: Conservation Physiology. 9, 1, 21 p., coab028.

Research output: Contribution to journal › Review › Research › peer-review

Species interactions alter the selection of thermal environment in a coral reef fish

Nay, T. J., Johansen, J. L., Rummer, J. L., Steffensen, John Fleng & Hoey, A. S., 2021, In: Oecologia. 196, 2, p. 363-371 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus)

Nielsen, J., Hedeholm, R. B., Lynghammar, A., McClusky, L. M., Berland, B., Steffensen, John Fleng & Christiansen, J. S., 2020, In: PLoS ONE. 15, 10, 22 p., e0238986.

Research output: Contribution to journal › Journal article › Research › peer-review

Bidirectional cyclical flows increase energetic costs of station holding for a labriform swimming fish, Cymatogaster aggregata

Luongo, S. M., Ruth, A., Gervais, C. R., Korsmeyer, K. E., Johansen, J. L., Domenici, P. & Steffensen, John Fleng, 2020, In: Conservation Physiology. 8, 1, 11 p., coaa077.

Research output: Contribution to journal › Journal article › Research › peer-review

Habitat complexity influences selection of thermal environment in a common coral reef fish

Nay, T. J., Johansen, J. L., Rummer, J. L., Steffensen, John Fleng, Pratchett, M. S. & Hoey, A. S., 2020, In: Conservation Physiology. 8, 1, 9 p., coaa070.

Research output: Contribution to journal › Journal article › Research › peer-review

Linking hunting weaponry to attack strategies in sailfish and striped marlin

Hansen, M. J., Krause, S., Breuker, M., Kurvers, R. H. J. M., Dhellemmes, F., Viblanc, P. E., Müller, J., Mahlow, C., Boswell, K., Marras, S., Domenici, P., Wilson, A. D. M., Herbert-Read, J. E., Steffensen, John Fleng, Fritsch, G., Hildebrandt, T. B., Zaslansky, P., Bach, P., Sabarros, P. S. & Krause, J., 2020, In: Proceedings of the Royal Society B: Biological Sciences. 287, 1918, 9 p., 20192228.

Research output: Contribution to journal › Journal article › Research › peer-review

Oil gland and oil pores in billfishes: in search of a function

Dhellemmes, F., Hansen, M. J., Bouet, S. D., Videler, J. J., Domenici, P., Steffensen, John Fleng, Hildebrandt, T., Fritsch, G., Bach, P., Sabarros, P. S., Krüger, A., Kurvers, R. H. J. M. & Krause, J., 2020, In: The Journal of Experimental Biology. 223, 7 p., jeb224956.

Research output: Contribution to journal › Journal article › Research › peer-review

Swimming in unsteady water flows: is turning in a changing flow an energetically expensive endeavor for fish?

Schakmann, M., Steffensen, John Fleng, Bushnell, P. G. & Korsmeyer, K. E., 2020, In: The Journal of Experimental Biology. 223, 6, 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The combined effect of body size and temperature on oxygen consumption rates and the size-dependency of preferred temperature in European perch Perca fluviatilis

Christensen, E. A. F., Svendsen, M. B. S. & Steffensen, John Fleng, 2020, In: Journal of Fish Biology. 97, 3, p. 794-803

Research output: Contribution to journal › Journal article › Research › peer-review

Advancing Research for the Management of Long-Lived Species: A Case Study on the Greenland Shark

Edwards, J. E., Hiltz, E., Broell, F., Bushnell, P. G., Campana, S. E., Christiansen, J. S., Devine, B. M., Gallant, J. J., Hedges, K. J., MacNeil, M. A., McMeans, B. C., Nielsen, J., Præbel, K., Skomal, G. B., Steffensen, John Fleng, Walter, R. P., Watanabe, Y. Y., VanderZwaag, D. L. & Hussey, N. E., 2019, In: Frontiers in Marine Science. 6, p. 1-27 87.

Research output: Contribution to journal › Journal article › Research › peer-review

Are all bony fishes oxygen regulators? Evidence for oxygen regulation in a putative oxygen conformer, the swamp eel Synbranchus marmoratus

Svendsen, M. B. S., Johansen, J. L., Bushnell, P. G., Skov, P. V., Norin, T., Domenici, P., Steffensen, John Fleng & Abe, A., 2019, In: Journal of Fish Biology. 94, 1, p. 178-182

Research output: Contribution to journal › Journal article › Research › peer-review

Dermal Denticles of Three Slowly Swimming Shark Species: Microscopy and Flow Visualization

Feld, K., Kolborg, Anne Noer, Nyborg, C. M., Salewski, M., Steffensen, John Fleng & Berg-Sørensen, K., 2019, In: Biomimetics. 4, 2, 20 p., 38.

Research output: Contribution to journal › Journal article › Research › peer-review

Excess postexercise oxygen consumption decreases with swimming duration in a labriform fish: integrating aerobic and anaerobic metabolism across time

Cordero, G. A., Methling, C., Tirsgaard, B., Steffensen, John Fleng, Domenici, P. & Svendsen, J. C., 2019, In: Journal of Experimental Zoology. Part A: Ecological and Integrative Physiology . 331, 10, p. 577-586 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Greenland Shark (Somniosus microcephalus) Stomach Contents and Stable Isotope Values Reveal an Ontogenetic Dietary Shift

Nielsen, J., Christiansen, J. S., Grønkjær, P., Bushnell, P., Steffensen, John Fleng, Kiilerich, H. O., Præbel, K. & Hedeholm, R., 2019, In: Frontiers in Marine Science. 6, p. 1-11 125.

Research output: Contribution to journal › Journal article › Research › peer-review

Intra-Specific Difference in the Effect of Salinity on Physiological Performance in European Perch (Perca fluviatilis) and Its Ecological Importance for Fish in Estuaries

Christensen, E. A. F., Stieglitz, J. D., Grosell, M. & Steffensen, John Fleng, 2019, In: Biology. 8, 4, 17 p., 89.

Research output: Contribution to journal › Journal article › Research › peer-review

Intussusceptive Vascular Remodeling Precedes Pathological Neovascularization

Ali, Z., Mukwaya, A., Biesemeier, A., Ntzouni, M., Ramsköld, D., Giatrellis, S., Mammadzada, P., Cao, R., Lennikov, A., Marass, M., Gerri, C., Hildesjö, C., Taylor, M., Deng, Q., Peebo, B., del Peso, L., Kvanta, A., Sandberg, R., Schraermeyer, U., Andre, H. & 5 others, Steffensen, John Fleng, Lagali, N., Cao, Y., Kele, J. & Jensen, L. D., 2019, In: Arteriosclerosis, Thrombosis, and Vascular Biology. 39, 7, p. 1402-1418

Research output: Contribution to journal › Journal article › Research › peer-review

Maximum salinity tolerance and osmoregulatory capabilities of European perch Perca fluviatilis populations originating from different salinity habitats

Christensen, E. A. F., Grosell, M. & Steffensen, John Fleng, 2019, In: Conservation Physiology. 7, 1, p. 1-5 coz004.

Research output: Contribution to journal › Journal article › Research › peer-review

Respiratory Physiology of European Plaice (Pleuronectes platessa) Exposed to Prymnesium parvum

Bergsson, H., Andersen, N. R., Svendsen, M. B. S., Hansen, Per Juel & Steffensen, John Fleng, 2019, In: Fishes. 4, 2, 13 p., 32.

Research output: Contribution to journal › Journal article › Research › peer-review

Blood pressure in the Greenland shark as estimated from ventral aortic elasticity

Shadwick, R. E., Bernal, D., Bushnell, P. G. & Steffensen, John Fleng, Oct 2018, In: Journal of Experimental Biology. 221, 19, p. 1-6 jeb186957.

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of salinity on swimming performance and oxygen consumption rate of shiner perch Cymatogaster aggregata

Christensen, E. A. F., Illing, B., Iversen, N. S., Johansen, J. L., Domenici, P. & Steffensen, John Fleng, Jul 2018, In: Journal of Experimental Marine Biology and Ecology. 504, p. 32-37 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of harmful algal blooms on fish: insights from Prymnesium parvum

Svendsen, M. B. S., Andersen, N. G., Hansen, Per Juel & Steffensen, John Fleng, 2018, In: Fishes. 3, 1, 12 p., 11.

Research output: Contribution to journal › Journal article › Research › peer-review

The emergence emergency: a mudskipper's response to temperatures

Nay, T. J., Gervais, C. R., Hoey, A. S., Johansen, J. L., Steffensen, John Fleng & Rummer, J. L., 2018, In: Journal of Thermal Biology. 78, p. 65-72

Research output: Contribution to journal › Journal article › Research › peer-review

Too hot to handle? Using movement to alleviate effects of elevated temperatures in a benthic elasmobranch, Hemiscyllium ocellatum

Gervais, C. R., Nay, T. J., Renshaw, G., Johansen, J. L., Steffensen, John Fleng & Rummer, J. L., 2018, In: Marine Biology. 165, 11, p. 1-12 162.

Research output: Contribution to journal › Journal article › Research › peer-review

Turbulent flow reduces oxygen consumption in the labriform swimming shiner perch, Cymatogaster aggregata

van der Hoop, J. M., Byron, M. L., Ozolina, K., Miller, D. L., Johansen, J. L., Domenici, P. & Steffensen, John Fleng, 2018, In: Journal of Experimental Biology. 221, 11, p. 1-11 jeb168773.

Research output: Contribution to journal › Journal article › Research › peer-review

Blood O₂ affinity of a large polar elasmobranch, the Greenland shark Somniosus microcephalus

Herbert, N. A., Skov, P. V., Tirsgård, B., Bushnell, P. G., Brill, R. W., Clark, C. H. & Steffensen, John Fleng, Nov 2017, In: Polar Biology. 40, 11, p. 2297-2305 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Injury-mediated decrease in locomotor performance increases predation risk in schooling fish

Krause, J., Herbert-Read, J. E., Seebacher, F., Domenici, P., Wilson, A. D. M., Marras, S., Svendsen, M. B. S., Strömbom, D., Steffensen, John Fleng, Krause, S., Viblanc, P. E., Couillaud, P., Bach, P., Sabarros, P. S., Zaslansky, P. & Kurvers, R. H. J. M., 19 Aug 2017, In: Philosophical Transactions of the Royal Society B: Biological Sciences. 372, 1727, 8 p., 20160232.

Research output: Contribution to journal › Journal article › Research › peer-review

The effect of hypoxia on fish schooling

Domenici, P., Steffensen, John Fleng & Marras, S., 19 Aug 2017, In: Philosophical Transactions of the Royal Society B: Biological Sciences. 372, 1727, 13 p., 20160236.

Research output: Contribution to journal › Journal article › Research › peer-review

The angular position of a refuge affects escape responses in staghorn sculpin Leptocottus armatus

Shi, X., Møller, J. S., Højgaard, J., Johansen, J. L., Steffensen, John Fleng, Liu, D. & Domenici, P., Jun 2017, In: Journal of Fish Biology. 90, 6, p. 2434-2442 9 p.

Research output: Contribution to journal › Letter › Research › peer-review

Plasma osmolality and oxygen consumption of perch Perca fluviatilis in response to different salinities and temperatures

Christensen, E. A. F., Svendsen, M. B. S. & Steffensen, John Fleng, Mar 2017, In: Journal of Fish Biology. 90, 3, p. 819-833 15 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Characterization of the functional and anatomical differences in the atrial and ventricular myocardium from three species of elasmobranch fishes: smooth dogfish (Mustelus canis), sandbar shark (Carcharhinus plumbeus), and clearnose skate (Raja eglanteria)

Larsen, J., Bushnell, P., Steffensen, John Fleng, Pedersen, M., Qvortrup, Klaus & Brill, R., Feb 2017, In: Journal of Comparative Physiology B: Biochemical, Systems, and Environmental Physiology. 187, 2, p. 291-313 23 p.

Research output: Contribution to journal › Journal article › Research › peer-review

To scale or not to scale: a perspective on describing fish energy budgeting

Svendsen, M. B. S., Christensen, E. A. F. & Steffensen, John Fleng, 1 Jan 2017, In: Conservation Physiology. 5, 1, 10 p., cox056.

Research output: Contribution to journal › Journal article › Research › peer-review

Adapt, move or die - how will tropical coral reef fishes cope with ocean warming?

Habary, A., Johansen, J. L., Nay, T. J., Steffensen, John Fleng & Rummer, J. L., 2017, In: Global Change Biology. 23, 2, p. 566-577 12 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Optimum temperature of a northern population of Arctic charr (Salvelinus alpinus) using heart rate Arrhenius breakpoint analysis

Hansen, A. K., Byriel, David Bille, R. Jensen, M., Steffensen, John Fleng & Svendsen, M. B. S., 2017, In: Polar Biology. 40, 5, p. 1063-1070 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The Evolution of Lateralization in Group Hunting Sailfish

Kurvers, R. H. J. M., Krause, S., Viblanc, P. E., Herbert-Read, J. E., Zaslansky, P., Domenici, P., Marras, S., Steffensen, John Fleng, Svendsen, M. B. S., Wilson, A. D. M., Couillaud, P., Boswell, K. M. & Krause, J., 2017, In: Current Biology. 27, 4, p. 521-526 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The Greenland shark: a new challenge for the oxidative stress theory of ageing?

Costantini, D., Smith, S., Killen, S. S., Nielsen, J. & Steffensen, John Fleng, 2017, In: Comparative Biochemistry and Physiology. Part A: Molecular & Integrative Physiology. 203, p. 227-232 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Eye lens radiocarbon reveals centuries of longevity in the Greenland shark (Somniosus microcephalus)

Nielsen, J., Hedeholm, R. B., Heinemeier, J., Bushnell, P. G., Christiansen, J. S., Olsen, J., Ramsey, C. B., Brill, R. W., Simon, M., Steffensen, K. F. & Steffensen, John Fleng, 12 Aug 2016, In: Science (New York, N.Y.). 353, 6300, p. 702-4 3 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Conservation physiology of marine fishes: state of the art and prospects for policy

McKenzie, D. J., Axelsson, M., Chabot, D., Claireaux, G., Cooke, S. J., Corner, R. A., De Boeck, G., Domenici, P., Guerreiro, P. M., Hamer, B., Jørgensen, C., Killen, S. S., Lefevre, S., Marras, S., Michaelidis, B., Nilsson, G. E., Peck, M. A., Perez-Ruzafa, A., Rijnsdorp, A. D., Shiels, H. A. & 9 others, Steffensen, John Fleng, Svendsen, J. C., Svendsen, M. B. S., Teal, L. R., van der Meer, J., Wang, T., Wilson, J. M., Wilson, R. W. & Metcalfe, J. D., 2016, In: Conservation Physiology. 4, 1, 20 p., cow046.

Research output: Contribution to journal › Review › Research › peer-review

Design and setup of intermittent-flow respirometry system for aquatic organisms

Svendsen, M. B. S., Bushnell, P. G. & Steffensen, John Fleng, 2016, In: Journal of Fish Biology. 88, 1, p. 26-50 25 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Effect of closed v. intermittent-flow respirometry on hypoxia tolerance in the shiner perch Cymatogaster aggregata

Snyder, S., Nadler, L. E., Bayley, J. S., Svendsen, M. B. S., Johansen, J. L., Domenici, P. & Steffensen, John Fleng, 2016, In: Journal of Fish Biology. 88, 1, p. 252-264 13 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Laser speckle contrast imaging for monitoring changes in microvascular blood flow

Ambrus, R., Strandby, R. B., Svendsen, Lars Bo, Achiam, Michael Patrick, Steffensen, John Fleng & Svendsen, M. B. S., 2016, In: European Surgical Research. 56, 3-4, p. 87-96 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Maximum swimming speeds of sailfish and three other large marine predatory fish species based on muscle contraction time and stride length: a myth revisited

Svendsen, M. B. S., Domenici, P., Marras, S., Krause, J., Boswell, K. M., Rodriguez-Pinto, I., Wilson, A. D. M., Kurvers, R. H. J. M., Viblanc, P. E., Finger, J. S. & Steffensen, John Fleng, 2016, In: Biology Open. 5, 10, p. 1415-1419 5 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Partitioning the metabolic scope: the importance of anaerobic metabolism and implications for the oxygen- and capacity-limited thermal tolerance (OCLTT) hypothesis

Ejbye-Ernst, R., Michaelsen, T. Y., Tirsgård, B., Wilson, J. M., Jensen, L. F., Steffensen, John Fleng, Pertoldi, C., Aarestrup, K. & Svendsen, J. C., 2016, In: Conservation Physiology. 4, 1, 13 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Proto-cooperation: group hunting sailfish improve hunting success by alternating attacks on grouping prey

Herbert-Read, J. E., Romanczuk, P., Krause, S., Strömbom, D., Couillaud, P., Domenici, P., Kurvers, R. H. J. M., Marras, S., Steffensen, John Fleng, Wilson, A. D. M. & Krause, J., 2016, In: Royal Society of London. Proceedings B. Biological Sciences. 283, 1842, 9 p., 20161671.

Research output: Contribution to journal › Journal article › Research › peer-review

Sources of variation in oxygen consumption of aquatic animals demonstrated by simulated constant oxygen consumption and respirometers of different sizes

Svendsen, M. B. S., Bushnell, P. G., Christensen, E. A. F. & Steffensen, John Fleng, 2016, In: Journal of Fish Biology. 88, 1, p. 51-64 14 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The determination of standard metabolic rate in fishes

Chabot, D., Steffensen, John Fleng & Farrell, A. P., 2016, In: Journal of Fish Biology. 88, 1, p. 81-121 41 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Behavioural thermoregulation in a temperature-sensitive coral reef fish, the five-lined cardinalfish (Cheilodipterus quinquelineatus)

Nay, T. J., Johansen, J. L., Habary, A., Steffensen, John Fleng & Rummer, J. L., 2015, In: Coral Reefs. 34, 4, p. 1261-1265 5 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of temperature on specific dynamic action in Atlantic cod Gadus morhua

Tirsgård, B., Svendsen, J. C. & Steffensen, John Fleng, 2015, In: Fish Physiology & Biochemistry. 41, 1, p. 41-50 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Fast-starting after a breath: air-breathing motions are kinematically similar to escape responses in the catfish Hoplosternum littorale

Domenici, P., Norin, T., Bushnell, P. G., Johansen, J. L., Skov, P. V., Svendsen, M. B. S., Steffensen, John Fleng & Abe, A. S., 2015, In: Biology Open. 4, p. 79-85 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Fish swimming in schools save energy regardless of their spatial position

Marras, S., Killen, S. S., Lindstroem, J., McKenzie, D. J., Steffensen, John Fleng & Domenici, P., 2015, In: Behavioral Ecology and Sociobiology. 69, 2, p. 219-226 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Intraspecific variation in aerobic and anaerobic locomotion: gilthead sea bream (Sparus aurata) and Trinidadian guppy (Poecilia reticulata) do not exhibit a trade-off between maximum sustained swimming speed and minimum cost of transport

Svendsen, J. C., Tirsgård, B., Cordero, G. A. & Steffensen, John Fleng, 2015, In: Frontiers in Physiology. 6, 12 p., 43.

Research output: Contribution to journal › Journal article › Research › peer-review

Not so fast: swimming behavior of sailfish during predator-prey interactions using high-speed video and accelerometry

Marras, S., Noda, T., Steffensen, John Fleng, Svendsen, M. B. S., Krause, J., Wilson, A. D. M., Kurvers, R. H. J. M., Herbert-Read, J., Boswell, K. M. & Domenici, P., 2015, In: Integrative and Comparative Biology. 55, 4, p. 719-727 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Prolonged SDA and reduced digestive efficiency under elevated CO₂ may explain reduced growth in Atlantic cod (Gadus morhua)

Tirsgård, B., Moran, D. & Steffensen, John Fleng, 2015, In: Aquatic Toxicology. 158, p. 171-180 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The effect of temperature and body size on metabolic scope of activity in juvenile Atlantic cod Gadus morhua L.

Tirsgård, B., Behrens, J. W. & Steffensen, John Fleng, 2015, In: Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology. 179, p. 89-94 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Winter temperatures decrease swimming performance and limit distributions of tropical damselfishes

Johansen, J. L., Steffensen, John Fleng & Jones, G. P., 2015, In: Conservation Physiology. 3, 1, 12 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Distribution and feeding ecology of the Greenland shark (Somniosus microcephalus) in Greenland waters

Nielsen, J., Hedeholm, R. B., Simon, M. & Steffensen, John Fleng, 2014, In: Polar Biology. 37, 1, p. 37-46 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Function and control of the fish secondary vascular system, a contrast to mammalian lymphatic systems

Rummer, J. L., Wang, S., Steffensen, John Fleng & Randall, D. J., 2014, In: Journal of Experimental Biology. 217, p. 751-757 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

How sailfish use their bills to capture schooling prey

Domenici, P., Wilson, A. D. M., Kurvers, R. H. J. M., Marras, S., Herbert-Read, J. E., Steffensen, John Fleng, Krause, S., Viblanc, P. E., Couillaud, P. & Krause, J., 2014, In: Proceedings of the Royal Society B: Biological Sciences. 281, 1784, 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Physiological mechanisms underlying individual variation in tolerance of food deprivation in juvenile European sea bass, Dicentrarchus labrax

McKenzie, D. J., Vergnet, A., Chatain, B., Vandeputte, M., Desmarais, E., Steffensen, John Fleng & Guinand, B., 2014, In: Journal of Experimental Biology. 217, 18, p. 3283-3292 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Severe hypoxia impairs lateralization in a marine teleost fish

Lucon-Xiccato, T., Nati, J. J. H., Blasco, F. R., Johansen, J. L., Steffensen, John Fleng & Domenici, P., 2014, In: Journal of Experimental Biology. 217, 23, p. 4115-4118 4 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The response of striped surfperch Embiotoca lateralis to progressive hypoxia: swimming activity, shoal structure, and estimated metabolic expenditure

Cook, D. G., Brown, E. J., Lefevre, S., Domenici, P. & Steffensen, John Fleng, 2014, In: Journal of Experimental Marine Biology and Ecology. 460, p. 162-169 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Unsteady flow affects swimming energetics in a labriform fish (Cymatogaster aggregata)

Roche, D. G., Taylor, M. K., Binning, S. A., Johansen, J. L., Domenici, P. & Steffensen, John Fleng, 2014, In: Journal of Experimental Biology. 217, p. 414-422 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Accelerometer tags: detecting and identifying activities in fish and the effect of sampling frequency

Broell, F. B., Noda, T., Wright, S., Domenici, P., Steffensen, John Fleng, Auclair, J. & Taggart, C. T., 2013, In: Journal of Experimental Biology. 216, 7, p. 1255-1264 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Differential occurrence of immune cells in the primary and secondary vascular systems in rainbow trout, Oncorhynchus mykiss (Walbaum)

Rasmussen, K. J., Steffensen, John Fleng & Buchmann, Kurt, 2013, In: Journal of Fish Diseases. 36, 7, p. 675-679 5 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of intraspecific variation in reproductive traits, pectoral fin use and burst swimming on metabolic rates and swimming performance in the Trinidadian guppy (Poecilia reticulata)

Svendsen, J. C., Banet, A. I., Christensen, R. H. B., Steffensen, John Fleng & Aarestrup, K., 2013, In: Journal of Experimental Biology. 216, 18, p. 3564-3574 11 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Energetic extremes in aquatic locomotion by coral reef fishes

Fulton, C. J., Johansen, J. L. & Steffensen, John Fleng, 2013, In: PLoS ONE. 8, 1, 6 p., e54033.

Research output: Contribution to journal › Journal article › Research › peer-review

Excess post-hypoxic oxygen consumption in Atlantic cod Gadus morhua

Plambech, M., Van Deurs, M., Steffensen, John Fleng, Tirsgård, B. & Behrens, J. W., 2013, In: Journal of Fish Biology. 83, 2, p. 396-403 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Excess post-hypoxic oxygen consumption is independent from lactate accumulation in two cyprinid fishes

Genz, J., Jyde, M. B., Svendsen, J. C., Steffensen, John Fleng & Ramløv, H., 2013, In: Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology. 165, 1, p. 54-60 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Hypercapnia adversely affects postprandial metabolism in the European eel (Anguilla anguilla)

Methling, C., Pedersen, P. B., Steffensen, John Fleng & Skov, P. V., 2013, In: Aquaculture. 416-417, p. 166-172 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Local Adaptation to Altitude Underlies Divergent Thermal Physiology in Tropical Killifishes of the Genus Aphyosemion

McKenzie, D., Estivales, G., Svendsen, J. C., Steffensen, John Fleng, Agnèse, J. & Nudds, R. L., 2013, In: P L o S One. 8, 1

Research output: Contribution to journal › Journal article › Research › peer-review

The effects of temperature on specific dynamic action and ammonia excretion in pikeperch (Sander lucioperca)

Frisk, M., Steffensen, John Fleng & Skov, P. V., 2013, In: Aquaculture. 404-405, p. 65-70 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Aerobic capacity influences the spatial position of individuals within fish schools

Killen, S. S., Marras, S., Steffensen, John Fleng & McKenzie, D., 2012, In: Proceedings of the Royal Society B: Biological Sciences. 279, 1727, p. 357-364 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Conservation physiology of marine fishes: advancing the predictive capacity of models

Jørgensen, C., Peck, M. A., Antognarelli, F., Azzurro, E., Burrows, M. T., Cheung, W. W. L., Cucco, A., Holt, R. E., Huebert, K. B., Marras, S., McKenzie, D., Metcalfe, J., Perez-Ruzafa, A., Sinerchia, M., Steffensen, John Fleng, Teal, L. R. & Domenici, P., 2012, In: Biology Letters. 8, 6, p. 900-903 4 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Excess posthypoxic oxygen consumption in rainbow trout (Oncorhynchus mykiss): recovery in normoxia and hypoxia

Svendsen, J. C., Steffensen, John Fleng, Aarestrup, K., Frisk, M., Etzerodt, A. & Jyde, M., 2012, In: Canadian Journal of Zoology. 90, 1, p. 1-11 11 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The contribution of air breathing to aerobic scope and exercise performance in the banded knifefish Gymnotus carapo L

McKenzie, D. J., Steffensen, John Fleng, Taylor, E. W. & Abe, A. S., 2012, In: Journal of Experimental Biology. 215, p. 1323-1330 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The temperature challenges on cardiac performance in winter-quiescent and migration-stage eels Anguilla anguilla

Methling, C., Steffensen, John Fleng & Skov, P. V., 2012, In: Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology. 163, 1, p. 66-73 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Thermal optimum for pikeperch (Sander lucioperca) and the use of ventilation frequency as a predictor of metabolic rate

Frisk, M., Skov, P. V. & Steffensen, John Fleng, 2012, In: Aquaculture. 324-325, p. 151-157 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Critical threshold size for overwintering sandeels (Ammodytes marinus)

van Deurs, M., Hartvig, M. & Steffensen, John Fleng, 1 Dec 2011, In: Marine Biology. 158, 12, p. 2755-2764 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Pop Up Satellite Tags Impair Swimming Performance and Energetics of the European Eel (Anguilla anguilla)

Methling, C., Tudorache, C., Skov, P. V. & Steffensen, John Fleng, 8 Jun 2011, In: P L o S One. 6, 6, p. e20797

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of maternal stress coping style on offspring characteristics in rainbow trout (Oncorhynchus mykiss): [plus] Corrigendum

Andersson, M. Å., Silva, P. I. M., Steffensen, John Fleng & Höglund, E., 2011, In: Hormones and Behavior. 60, 5, p. 699-705 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Primary versus secondary drivers of foraging activity in sandeel schools (Ammodytes tobianus)

Van Deurs, M. S. K., Behrens, J. W., Warnar, T. & Steffensen, John Fleng, 2011, In: Marine Biology. 158, 8, p. 1781-1789 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The hypoxia avoidance behaviour of juvenile Atlantic cod (Gadus morhua L.) depends on the provision and pressure level of an O₂ refuge

Herbert, N. A., Skjaeraasen, J. E., Nilsen, T., Salvanes, A. G. V. & Steffensen, John Fleng, 2011, In: Marine Biology. 158, 4, p. 737-746 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Hypoxia-induced metastasis model in embryonic zebrafish

Rouhi, P., Jensen, L. D., Cao, Z., Hosaka, K., Lanne, T., Wahlberg, E., Steffensen, John Fleng & Cao, Y., 1 Dec 2010, In: Nature Protocols (Print). 5, 12, p. 1911-1918 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Hypoxia-induced retinopathy model in adult zebrafish

Cao, Z., Jensen, L. D., Rouhi, P., Hosaka, K., Lanne, T., Steffensen, John Fleng, Wahlberg, E. & Cao, Y., 1 Dec 2010, In: Nature Protocols (Print). 5, 12, p. 1903-1910 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Embryonic suckling and maternal specializations in the live-bearing teleost Zoarces viviparus

Skov, P. V., Steffensen, John Fleng, Sorensen, T. F. & Qvortrup, Klaus, 15 Nov 2010, In: Journal of Experimental Marine Biology and Ecology. 395, 1-2, p. 120-127 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The accuracy and limitations of a new meter used to measure aqueous carbon dioxide

Moran, D., Tirsgård, B. & Steffensen, John Fleng, 1 Nov 2010, In: Aquacultural Engineering. 43, 3, p. 101-107 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Effect of moderate hypoxia at three acclimation temperatures on stress responses in Atlantic cod with different haemoglobin types

Methling, C., Aluru, N., Vijayan, M. M. & Steffensen, John Fleng, 2010, In: Comparative Biochemistry and Physiology A. 156, 4, p. 485-90 5 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Influence of moderate and severe hypoxia on the diurnal activity pattern of lesser sandeel Ammodytes tobianus

Behrens, J. W., Petersen, J. K., Aertebjerg, G. & Steffensen, John Fleng, 2010, In: Journal of Fish Biology. 77, 3, p. 538-51 13 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Kinematics and energetic benefits of schooling in the labriform fish, striped surfperch Embiotoca lateralis

Johansen, J. L., Vaknin, R., Steffensen, John Fleng & Domenici, P., 2010, In: Marine Ecology - Progress Series. 420, p. 221-229 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Partition of aerobic and anaerobic swimming costs related to gait transitions in a labriform swimmer

Svendsen, J. C., Tudorache, C., Jordan, A. D., Steffensen, John Fleng, Aarestrup, K. & Domenici, P., 2010, In: Journal of Experimental Biology. 213, Pt 13, p. 2177-83 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The effects of swimming pattern on the energy use of gilthead seabream (Sparus aurata L.)

Steinhausen, M. F., Steffensen, John Fleng & Andersen, N. G., 2010, In: Marine and Freshwater Behaviour and Physiology. 43, 4, p. 227-241

Research output: Contribution to journal › Journal article › Research › peer-review

Abolition of reflex bradycardia by cardiac vagotomy has no effect on the regulation of oxygen uptake by Atlantic cod in progressive hypoxia

McKenzie, D. J., Skov, P. V., Taylor, E. W. T., Wang, T. & Steffensen, John Fleng, 2009, In: Comparative Biochemistry and Physiology A. 153, 3, p. 332-8 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Larval developmental rate, metabolic rate and future growth performance in Atlantic salmon

Serrano, J. V., Aberg, M., Gjoen, H. M., Steffensen, John Fleng & Hyglund, E., 2009, In: Comparative Biochemistry and Physiology A. 2, Suppl. 1, p. S140

Research output: Contribution to journal › Conference abstract in journal › Research

Nitric oxide permits hypoxia-induced lymphatic perfusion by controlling arterial-lymphatic conduits in zebrafish and glass catfish

Dahl Ejby Jensen, L., Cao, R., Hedlund, E., Söll, I., Lundberg, J. O., Hauptmann, G., Steffensen, John Fleng & Cao, Y., 2009, In: Proceedings of the National Academy of Science of the United States of America. 106, 43, p. 18408-13 5 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Pectoral fin beat frequency predicts oxygen consumption during spontaneous activity in a labriform swimming fish (Embiotoca lateralis)

Tudorache, C., Jordan, Anders Drud, Svendsen, J. C., Domenici, P., DeBoeck, G. & Steffensen, John Fleng, 2009, In: Environmental Biology of Fishes. 84, p. 121-127 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Physiological energetics may contribute to competitive exclusion in African killifish (Aphyosemion spp.).

McKenzie, D. J., Svendsen, J. C., Steffensen, John Fleng & Agnese, J., 2009, In: Comparative Biochemistry and Physiology A. 2, Supplement 1, p. S150 1 p.

Research output: Contribution to journal › Conference abstract in journal › Research

The role of adrenaline as a modulator of cardiac performance in two Antarctic fishes

Skov, P. V., Bushnell, P. G., Tirsgaard, B. & Steffensen, John Fleng, 2009, In: Polar Biology. 32, 2, p. 215-223

Research output: Contribution to journal › Journal article › Research › peer-review

Does autonomic regulation of heart rate optimise oxygen uptake in teleost fishes?

McKenzie, D., Taylor, E., Wang, T., Skov, P. V., Steffensen, John Fleng, Campbell, H., Leite, C. & Abe, A., 2008, In: Comparative Biochemistry and Physiology - Part A: Comparative Physiology. 150, 3, Supplement, p. S117 1 p.

Research output: Contribution to journal › Conference abstract in journal › Research

Effect of ammonia on weatherloach (Misgurnus anguillicaudatus) metabolism under aquatic and aerial conditions

Silva, J. M., Coimbra, J., Steffensen, John Fleng & Wilson, J., 2008, In: Comparative Biochemistry and Physiology A. 150, 3, Supplement 1, p. S120 1 p., A6.21.

Research output: Contribution to journal › Conference abstract in journal › Research

Plasma FITC-dextran exchange between the primary and secondary circulatory systems in the Atlantic cod, Gadus Morhua.

Fischer, C. & Steffensen, John Fleng, 2008, In: Fish Physiology & Biochemistry. 34, 3, p. 245-9 4 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Suckling behaviour in a viviparous teleost: role of the post-ovulatory follicle in matemal-embryonic exchange

Skov, P. V., Sørensen, T. & Steffensen, John Fleng, 2008, In: Comparative Biochemistry and Physiology A. 150, 3, Supplement, p. S122 1 p., A6.27.

Research output: Contribution to journal › Conference abstract in journal › Research

The parasite fauna of Arctogadus glacialis (Peters) (Gadidae) from western and eastern Greenland

Køie, M., Steffensen, John Fleng, Møller, Peter Rask & Christiansen, J. S., 2008, In: Polar Biology. 31, 9, p. 1017-1021 5 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The role of adrenaline as a modulator of cardiac performance in three Notothenioid fishes

Skov, P. V., Bushnell, P., Tirsgaard, B. & Steffensen, John Fleng, 2008, In: Comparative Biochemistry and Physiology A. 150, 3, Supplement, p. S97-S98 2 p., A5.3.

Research output: Contribution to journal › Conference abstract in journal › Research

Variation in oxygen consumption and temperature preference of Atlantic cod, Gadus morhua, from Denmark and Greenland

Steffensen, John Fleng, 2008, In: Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology. 150, 3, Supplement, p. S206-S207

Research output: Contribution to journal › Conference abstract in journal › Research

Vascularization of the lateral line organ in the Atlantic cod: involvement of the secondary vascular system

Bielecki, J., Skov, P. V., Tranum-Jensen, Jørgen & Steffensen, John Fleng, 2008, In: Journal of Zoology. 276, 2, p. 142-148 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of ration size and hypoxia on specific dynamic action in the cod

Jordan, Anders Drud & Steffensen, John Fleng, 2007, In: Physiological and Biochemical Zoology.

Research output: Contribution to journal › Journal article › Research › peer-review

Erratum: Gait transition and oxygen consumption in swimming striped perch Embiotoca lateralis Agassiz (Journal of Fish Biology (2006) 69 (1612-1625))

Cannas, M., Schaefer, J., Domenici, P. & Steffensen, John Fleng, 2007, In: Journal of Fish Biology.

Research output: Contribution to journal › Journal article › Research › peer-review

Oxygen dynamics around buried lesser sandeels Ammodytes tobianus (Linnaeus 1785): mode of ventilation and oxygen requirements.

Behrens, J. W., Stahl, H. J., Steffensen, John Fleng & Glud, R. N., 2007, In: Journal of Experimental Biology. 210, Pt 6, p. 1006-14 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Swimming alters responses to hypoxia in the Adriatic sturgeon Acipenser naccarii

McKenzie, D. J., Steffensen, John Fleng, Korsmeyer, K., Whiteley, N. M., Bronzi, P. & Taylor, E. W., 2007, In: Journal of Fish Biology. 70, p. 651-658

Research output: Contribution to journal › Journal article › Research › peer-review

The Effect of Ration Size and Hypoxia on Specific Dynamic Action in the Cod

Jordan, Anders Drud & Steffensen, John Fleng, 2007, In: Physiological and Biochemical Zoology. 80, 2, p. 178-185

Research output: Contribution to journal › Journal article › Research › peer-review

The effect of hypoxia on behavioural and physiological aspects of lesser sandeel, Ammodytes tobianus (Linnaeus, 1785)

Behrens, J. W. & Steffensen, John Fleng, 2007, In: Marine Biology. 150, p. 1365-1377

Research output: Contribution to journal › Journal article › Research › peer-review

The relationship between caudal differential pressure and activity of Atlantic cod: a potential method to predict oxygen consumption of free-swimming fish

Steinhausen, M. F., Steffensen, John Fleng & Andersen, N. G., 2007, In: Journal of Fish Biology. 71, p. 957-969

Research output: Contribution to journal › Journal article › Research › peer-review

Vascular arrangement and ultrastructure of the European eelpout Zoarces viviparus ovary: implications for maternal-embryonic exchange.

Skov, P. V., Sørensen, T. F., Ramløv, H. & Steffensen, John Fleng, 2007, In: Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology. 290, 12, p. 1500-7 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

A Novel Acoustic Dissolved Oxygen Transmitter for Fish Telemetry

Svendsen, J. C., Aarestrup, K., Steffensen, John Fleng & Herskin, J., 2006, In: Marine Technology Society Journal. 40, 1, p. 103-108

Research output: Contribution to journal › Journal article › Research › peer-review

Gait transition and oxygen consumption in swimming striped surfperch Embiotoca lateralis Agassiz

Cannas, M., Schaefer, J., Domenici, P. & Steffensen, John Fleng, 2006, In: Journal of Fish Biology. 69, 6, p. 1612-1625

Research output: Contribution to journal › Journal article › Research › peer-review

Growth of Atlantic cod (Gadus morhua L.) with different haemoglobin subtypes when kept near their temperature preferenda

Jordan, A. D., Lampe, J. F., Grisdale-Helland, B., Helland, S. J., Shearer, K. D. & Steffensen, John Fleng, 2006, In: Aquaculture. 257, p. 44-52

Research output: Contribution to journal › Journal article › Research › peer-review

Hypoxia increases the behavioural activity of schooling herring: a response to physiological stress or respiratory distress?

Herbert, N. A. & Steffensen, John Fleng, 2006, In: Marine Biology. 149, 5, p. 1217-1225

Research output: Contribution to journal › Journal article › Research › peer-review

Metabolic aspects of torpor in hummingbirds

Bech, C. & Steffensen, John Fleng, 2006, In: Tung wu hsüeh pao. 52(Suppl.), p. 397-400

Research output: Contribution to journal › Journal article › Research › peer-review

Swimming energetics of the Barents Sea capelin (Mallotur villosus) during the spawning migration period

Behrens, J. W., Præbel, K. & Steffensen, John Fleng, 2006, In: Journal of Experimental Marine Biology and Ecology. 2, 331, p. 208-216

Research output: Contribution to journal › Journal article › Research › peer-review

The behavioural and physiological response of Atlantic cod Gadus morhua L. to short-term acute hypoxia

Johansen, J. L., Herbert, N. A. & Steffensen, John Fleng, 2006, In: Journal of Fish Biology. 68, 6, p. 1918-1924 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The effect of external dummy transmitters on oxygen consumption and performance of swimming Atlantic cod

Steinhausen, M. F., Andersen, N. G. & Steffensen, John Fleng, 2006, In: Journal of Fish Biology. 69, p. 951-956

Research output: Contribution to journal › Journal article › Research › peer-review

Whole blood-oxygen binding properties of four cold-temperate marine fishes: blood affinity is independent of pH-dependent binding, routine swimming performance, and environmental hypoxia.

Herbert, N. A., Skov, P. V., Wells, R. M. G. & Steffensen, John Fleng, 2006, In: Physiological and Biochemical Zoology. 79, 5, p. 909-18 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Comparison of metabolic rate during forced and spontaneous activity of seabream (Sparus aurata)

Steinhausen, M. F. & Steffensen, John Fleng, 2005, In: Comparative Biochemistry and Physiology A. 3, p. S213

Research output: Contribution to journal › Conference abstract in journal › Research

Does temperature preference relate to the anaerobic capacity of Atlantic cod (Gadus morhua L.) with different haemoglobin phenotype?

Jordan, Anders Drud, Steinhausen, M. F., Herbert, N. A., Grisdale-Helland, B., Helland, S. J. & Steffensen, John Fleng, 2005, In: Marine Biology Research. 1, 6, p. 411-416

Research output: Contribution to journal › Journal article › Research › peer-review

Oxygen conditions in fish schools

Steffensen, John Fleng, 2005, In: Comparative Biochemistry and Physiology A. 3, p. S167

Research output: Contribution to journal › Conference abstract in journal › Research

Physiology and behaviour of Atlantic cod (Gadus morhua) with different haemoglobin genotypes: the effect of hypoxia

Steffensen, John Fleng, 2005, In: Comparative Biochemistry and Physiology A. 3, p. S99

Research output: Contribution to journal › Conference abstract in journal › Research

Specific dynamic action in Gadus morhua under normoxia and moderate strong hypoxia

Jordan, A. D. & Steffensen, John Fleng, 2005, In: Comparative Biochemistry and Physiology A. 3, p. S213

Research output: Contribution to journal › Conference abstract in journal › Research

Tail beat frequency as a predictor of swimming speed and oxygen consumption of saithe (Pollachius virens) and whiting (Merlangius merlangus) during forced swimming.

Steinhausen, M. F., Steffensen, John Fleng & Andersen, N. G., 2005, In: Marine Biology. 148, p. 197-204

Research output: Contribution to journal › Journal article › Research › peer-review

The response of Atlantic cod, Gadus morhua, to progressive hypoxia: fish swimming speed and physiological stress

Herbert, N. A. & Steffensen, John Fleng, 2005, In: Marine Biology. 147, p. 1403-1412

Research output: Contribution to journal › Journal article › Research › peer-review

The response of lesser sandeel (Ammodytes tobianus) to acute hypoxia; swimming activity and physiological stress

Behrens, J. W. & Steffensen, John Fleng, 2005, In: Comparative Biochemistry and Physiology A. 3, p. S171

Research output: Contribution to journal › Conference article › Research › peer-review

Escape performance in three teleosts from West Greenland

Jordan, Anders Drud, Steffensen, John Fleng & Herbert, N. A., 2004, In: Polar Biology. 28, p. 164-167

Research output: Contribution to journal › Journal article › Research › peer-review

The interrelated effects of body size and choroids rete development on ocular O2 partial pressure of Atlantic cod (Gadus morhua) and Greenland cod (Gadus ogac).

Herbert, N. A., Steffensen, John Fleng & Jordan, Anders Drud, 2004, In: Polar Biology. 27, p. 748-752

Research output: Contribution to journal › Journal article › Research › peer-review

Cod could face a breathless future: Inside JEB

Petersen, M. F. & Steffensen, John Fleng, 2003, In: Journal of Experimental Biology. 206, p. 211

Research output: Contribution to journal › Journal article › Research › peer-review

Does fish from the Disko Bay area of Greenland possess antifreeze proteins during the summer?

Enevoldsen, L. T., Heiner, I., Devries, A. L. & Steffensen, John Fleng, 2003, In: Polar Biology. 26, p. 365-370

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of growth hormone transgenesis on metabolic rate, exercise performance and hypoxia tolerance in tilapia hybrids

McKenzie, D., Martinez, R., Morales, A., Acosta, J., Morales, R., Taylor, E., Steffensen, John Fleng & Estrada, M., 2003, In: Journal of Fish Biology. 63, 2, p. 398-409

Research output: Contribution to journal › Journal article › Research › peer-review

Fiskenes sekundære cirkulationssystem

Skov, P. V. & Steffensen, John Fleng, 2003, In: Naturens Verden. 10, p. 14-19

Research output: Contribution to journal › Journal article › Communication

Intra-school positional preference and reduced tail beat frequency in trailing positions in schooling roach under experimental conditions

Svendsen, J. C., Skov, J., Bildsøe, M. & Steffensen, John Fleng, 2003, In: Journal of Fish Biology. 62, 4, p. 834-846 13 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Preferred temperature of juvenile Atlantic cod Gadus morhua with different haemoglobin genotypes at normoxia and moderate hypoxia.

Petersen, M. F. & Steffensen, John Fleng, 2003, In: Journal of Experimental Biology. 206, Pt 2, p. 359-64 5 p.

Research output: Contribution to journal › Journal article › Research › peer-review

The blood volumes of the primary and secondary circulatory system in the Atlantic cod, Gadus morhua L., using plasma bound Evans Blue and compartmental analysis.

Skov, P. V. & Steffensen, John Fleng, 2003, In: Journal of Experimental Biology. 206, p. 591-599 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Tolerance of chronic hypercapnia by the European eel Anguilla anguilla.

McKenzie, D. J., Piccolella, M., Dalla Valle, A. Z., Taylor, E. W., Bolis, C. L. & Steffensen, John Fleng, 2003, In: Journal of Experimental Biology. 206, Pt 10, p. 1717-26 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Energetics of median and paired fin swimming, body and caudal fin swimming, and gait transition in parrotfish (Scarus schlegeli) and triggerfish (Rhinecanthus aculeatus).

Korsmeyer, K. E., Steffensen, John Fleng & Herskin, J., 2002, In: Journal of Experimental Biology. 205, Pt 9, p. 1253-63 10 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Metabolic cold adaptation of polar fish based on measurements of aerobic oxygen consumption: fact or artefact? Artefact!

Steffensen, John Fleng, 2002, In: Comparative Biochemistry and Physiology A. 132, 4, p. 789-95 6 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Phylogenetic position of the cryopelagic codfish genus Arctogadus Drjagin, 1932 based on partial mitochondrial cytochrome b sequences

Møller, Peter Rask, Jordan, Anders Drud, Gravlund, P. & Steffensen, John Fleng, 2002, In: Polar Biology. 25, 5, p. 342-349

Research output: Contribution to journal › Journal article › Research › peer-review

Respirometry across the gait transition in a labriform swimmer (Embiotoca lateralis).

Schaefer, J., Cannas, M. & Steffensen, John Fleng, 2002, In: Integrative and Comparative Biology. 6, p. 1307

Research output: Contribution to journal › Conference abstract in journal › Research

The effect of progressive hypoxia on school structure and dynamics in Atlantic herring Clupea harengus.

Domenici, P., Ferrari, R. S., Steffensen, John Fleng & Batty, R. S., 2002, In: Proceedings of the Royal Society of London. Biological Sciences. 269, 1505, p. 2103-11 8 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Tolerance of acute hypercapnic acidosis by the European eel ( Anguilla anguilla).

McKenzie, D. J., Taylor, E. W., Dalla Valle, A. Z. & Steffensen, John Fleng, 2002, In: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology. 172, 4, p. 339-46 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Growth hormone transgenic tilapia (Oreochromis sp.) compensate for increased metabolic rate to preserve exercise performance and hypoxia tolerance

McKenzie, D. J., Martínez, R., Morales, A., Acosta, J., Taylor, E. W., Steffensen, John Fleng & Estrada, M. P., 2001, In: Journal of Physiology. xx, p. 531

Research output: Contribution to journal › Conference abstract in journal › Research

Oxygen consumption of East Siberan cod: no support for the metabolic cod adaptation theory

Steffensen, John Fleng, Jordan, A. D. & Jungersen, M., 2001, In: Journal of Fish Biology. 59, p. 818-823

Research output: Contribution to journal › Journal article › Research › peer-review

Oxygen consumption of East Siberian cod: no support for the metabolic cold adaptation theory

Jordan, Anders Drud, Jungersen, M. & Steffensen, John Fleng, 2001, In: Journal of Fish Biology. 59, 4, p. 818-823

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of dietary fatty acid composition on metabolic rate and responses to hypoxia in the European eel (Anguilla anguilla)

McKenzie, D. J., Piraccini, G., Piccolella, M., Steffensen, John Fleng, Bolis, C. L. & Taylor, E. W., 2000, In: Fish Physiology & Biochemistry. 22, 4, p. 281-296

Research output: Contribution to journal › Journal article › Research › peer-review

The effect of progressive hypoxia on swimming activity and schooling in Atlantic herring

Domenici, P., Steffensen, John Fleng & Batty, R. S., 2000, In: Journal of Fish Biology. 57, 6, p. 1526-1538

Research output: Contribution to journal › Journal article › Research › peer-review

Tolerance of hypercapnic acidosis by the European eel, Anguilla anguilla

McKenzie, D., Dalla Valle, A., Steffensen, John Fleng & Taylor, E., 2000, In: Journal of Physiology. Suppl. S, p. 282P-283P

Research output: Contribution to journal › Conference abstract in journal › Research

The influence of dietary fatty acid composition on the respiratory and cardiovascular physiology of Adriatic sturgeon (Acipenser naccarii): a review

McKenzie, D., Piraccini, G., Agnisola, C., Steffensen, John Fleng, Bronzi, P., Bolis, C., Tota, B. & Taylor, E., 1999, In: Journal of Applied Ichthyology. 15, 4-5, p. 265-269

Research output: Contribution to journal › Journal article › Research › peer-review

Blood Volume, Plasma Volume and Circulation Time in a High-Energy-Demand Teleost, the Yellowfin Tuna (Thunnus Albacares)

Brill, R. W., Cousins, K. L., Jones, D. R., Bushnell, P. G. & Steffensen, John Fleng, 1998, In: Journal of Experimental Biology. 201, 5, p. 647-654

Research output: Contribution to journal › Journal article › Research › peer-review

Energy savings in sea bass swimming in a school: measurements of tail beat frequency and oxygen consumption at different swimming speeds

Herskin, J. & Steffensen, John Fleng, 1998, In: Journal of Fish Biology. 53, 2, p. 366-376

Research output: Contribution to journal › Journal article › Research › peer-review

Muscle dynamics in fish during steady swimming

Shadwick, R., Steffensen, John Fleng, Katz, S. & Knower, T., 1998, In: Integrative and Comparative Biology. 38, 4, p. 755-770

Research output: Contribution to journal › Journal article › Research › peer-review

Swimming performance, venous oxygen tension and cardiac performance of coronary-ligated rainbow trout, Oncorhynchus mykiss, exposed to progressive hypoxia.

Steffensen, John Fleng & Farrell, A. P., 1998, In: Comparative Biochemistry and Physiology A. 119, 2, p. 585-92 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of temperature, hypoxia and activity on the metabolism of juvenile Atlantic cod

Schurmann, H. & Steffensen, John Fleng, 1997, In: Journal of Fish Biology. 50, p. 1166-1180

Research output: Contribution to journal › Journal article › Research › peer-review

Macromolecular capillary permeability of three species of fish.

Bushnell, P., Steffensen, John Fleng, Brill, R. & Jones, D., 1997, In: The FASEB Journal. 3, p. 558

Research output: Contribution to journal › Conference abstract in journal › Research

The effects of acute hypoxia and hypercapnia on oxygen consumption of the freshwater European eel

Cruz-Neto, A. P. & Steffensen, John Fleng, 1997, In: Journal of Fish Biology. 50, p. 759-769

Research output: Contribution to journal › Journal article › Research › peer-review

Torpor in Three Species of Brazilian Hummingbirds under Semi-Natural Condition

Bech, C., Steffensen, John Fleng, Merger, M., Bicodu, J. E. P. W. & Abe, A. S., 1997, In: The condor. 99, p. 780-788

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of diet on spontaneous locomotor activity and oxygen consumption in Adriatic sturgeon (Acipenser naccarii)

McKenzie, D. J., Piraccini, G., Steffensen, John Fleng, Bolis, C. L., Bronzi, P. & Taylor, E. W., Oct 1995, In: Fish Physiology and Biochemistry. 14, 5, p. 341-355 15 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Protein synthesis, growth and energetics in larval herring (Clupea harengus) at different feeding regimes

Houlihan, D. F., Pedersen, B. H., Steffensen, John Fleng & Brechin, J., Jun 1995, In: Fish Physiology & Biochemistry. 14, 3, p. 195-208 14 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of diet on spontaneous locomotor activity and oxygen consumption in Adriatic sturgeon (Acipenser naccarli)

McKenzie, D. J., Piraccini, G., Steffensen, John Fleng, Bolis, C. L., Bronzi, P. & Taylor, E. W., 1995, In: Fish Physiology & Biochemistry. 14 (5), p. 341-355

Research output: Contribution to journal › Journal article › Research › peer-review

Protein synthesis, growth and energetics in larval herring (Clupea harengus) at different feeding regimes

Houlihan, D. F., Pedersen, B. H., Steffensen, John Fleng & Brechin, J., 1995, In: Fish Physiology & Biochemistry. 14 (3), p. 195-208

Research output: Contribution to journal › Journal article › Research › peer-review

Torpor e energética em Beija-flores do Sudeste Brasileiro

Abe, A. S., Bech, C., Steffensen, John Fleng, Berger, M. & Bicodu, J. E. P. W., 1995, In: Museu de Biologia Mello Leitao. Boletim. 2, p. 3-13

Research output: Contribution to journal › Journal article › Research › peer-review

Exercise metabolism in two species of cod in arctic waters

Bushnell, P. G., Steffensen, John Fleng, Schurmann, H. & Jones, D. R., 1994, In: Polar Biology. 14, p. 43-48

Research output: Contribution to journal › Journal article › Research › peer-review

Oxygen consumption in four species of teleosts from Greenland: no evidence of metabolic cold adaptation

Steffensen, John Fleng, Bushnell, P. G. & Schurmann, H., 1994, In: Polar Biology. 14, 1, p. 49-54

Research output: Contribution to journal › Journal article › Research › peer-review

Spontaneous swimming activity of Atlantic cod Gadus morhua exposed to graded hypoxia at three temperatures

Schurmann, H. & Steffensen, John Fleng, 1994, In: Journal of Experimental Biology. 197, p. 129-142

Research output: Contribution to journal › Journal article › Research › peer-review

The cost of hovering and forward flight in a nectar-feeding bat, Glossophaga soricina, estimated from aerodynamic theory.

Norberg, U. M., Kunz, T. H., Steffensen, John Fleng, Winter, Y. & von Helversen, O., 1993, In: Journal of Experimental Biology. 182, p. 207-27 20 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Har fisk et lymfekarsystem?

Lomholt, J. P. & Steffensen, John Fleng, 1992, In: Naturens Verden. 1, p. 15-21

Research output: Contribution to journal › Journal article › Communication

Lethal oxygen levels at different temperatures and the preferred temperature during hypoxia of the Atlantic cod Gadus morhua L.

Schurmann, H. & Steffensen, John Fleng, 1992, In: Journal of Fish Biology. 41, 6, p. 927-934

Research output: Contribution to journal › Journal article › Research › peer-review

The effect of hypoxia on the preferred temperature of the rainbow trout, Oncorhynchus mykiss, and the Atlantic cod, Gadus morhua

Steffensen, John Fleng & Schurmann, H., 1992, In: Proc.12th Symp.Baltic Mar.Biol., Helsingør, Denmark. p. 157-162

Research output: Contribution to journal › Conference article › Research › peer-review

Fisk foretrækker lavere temperatur under iltsvind

Schurmann, H. & Steffensen, John Fleng, 1991, In: Vand & Miljø. 9, p. 434-437

Research output: Contribution to journal › Journal article › Communication

The influence of Hypoxia on the Preferred Temperature of Rainbow Trout Oncorhynchus mykiss

Schurmann, H., Steffensen, John Fleng & Lomholt, J. F., 1991, In: Journal of Experimental Biology. 157, p. 75-86

Research output: Contribution to journal › Journal article › Research › peer-review

Effects of exercise training and coronary ablation on swimming performance, heart size, and cardiac enzymes in rainbow trout, Oncorhynchus mykiss

FARRELL, A., JOHANSEN, J., Steffensen, John Fleng, MOYES, C., WEST, T. & SUAREZ, R., 1990, In: Canadian Journal of Zoology. 68, 6, p. 1174-1179

Research output: Contribution to journal › Journal article › Research › peer-review

Some errors in respirometry of aquatic breathers: How to avoid and correct for them

Steffensen, John Fleng, 1989, In: Fish Physiology & Biochemistry. 6, 1, p. 49-59

Research output: Contribution to journal › Journal article › Research › peer-review

An analysis of the energetic cost of the branchial and cardiac pumps during sustained swimming in trout

FARRELL, A. & Steffensen, John Fleng, 1987, In: {FISH PHYSIOLOGY AND BIOCHEMISTRY}. 4, 2, p. 73-79

Research output: Contribution to journal › Journal article › Research › peer-review

Control of red cell volume and pH in trout: Effects of isoproterenol, transport inhibitors, and extracellular pH in bicarbonate/carbon dioxide-buffered media

NIKINMAA, M., Steffensen, John Fleng, TUFTS, B. & RANDALL, D., 1987, In: Journal of Experimental Zoology. Part A: Ecological Genetics and Physiology (Print Edition). 242, 3, p. 273-281

Research output: Contribution to journal › Journal article › Research › peer-review

Coronary ligation reduces maximum sustained swimming speed in Chinook salmon, Oncorhynchus tshawytscha.

Farrell, A. P. & Steffensen, John Fleng, 1987, In: Comparative Biochemistry and Physiology - Part A: Comparative Physiology. 87, 1, p. 35-7 2 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Effect of burst swimming and adrenaline infusion on O2 consumption and CO2 excretion in rainbow trout, Salmo gairdneri.

Steffensen, John Fleng, Tufts, B. L. & Randall, D. J., 1987, In: Journal of Experimental Biology. 131, p. 427-34 7 p.

Research output: Contribution to journal › Journal article › Research › peer-review

Ion exchange mechanisms on the erythrocyte membrane of the aquatic salamander, Amphiuma tridactylum.

Tufts, B. L., Nikinmaa, M., Steffensen, John Fleng & Randall, D. J., 1987, In: Journal of Experimental Biology. 133, p. 329-38 9 p.

Research output: Contribution to journal › Journal article › Research › peer-review

In vivo Observations on a Specialized Microvasculature, the Primary and Secondary Vessels in Fishes

Steffensen, John Fleng, LOMHOLT, J. & VOGEL, W., 1986, In: Acta Zoologica. 67, 4, p. 193-200

Research output: Contribution to journal › Journal article › Research › peer-review