John Fleng Steffensen

John Fleng Steffensen

Professor

ORCID: 0000-0002-4477-8039

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  1. Published

    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

  2. Published

    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

  3. Published

    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

  4. Published

    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

  5. Published

    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

  6. Published

    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

  7. Published

    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

  8. Published

    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

  9. Published

    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

  10. Published

    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

  11. Published

    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

  12. Published

    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

  13. Published

    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

  14. Published

    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

  15. Published

    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

  16. Published

    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

  17. Published

    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

  18. Published

    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

  19. Published

    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

  20. Published

    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

  21. Published

    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

  22. Published

    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

  23. Published

    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

  24. Published

    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

  25. Published

    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

  26. Published

    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

  27. Published

    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

  28. Published

    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

  29. Published

    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

  30. Published

    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

  31. Published

    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

  32. Published

    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

  33. Published

    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

  34. Published

    Active predation by Greenland shark Somniosus microcephalus

    Nielsen, J., hedeholm, R., Simon, M. & Steffensen, John Fleng, 2013.

    Research output: Contribution to conference › Conference abstract for conference › Research

  35. Published

    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

  36. Published

    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

  37. Published

    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

  38. Published

    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

  39. Published

    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

  40. Published

    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

  41. Published

    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

  42. Published

    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

  43. E-pub ahead of print

    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

  44. Published

    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

  45. Published

    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

  46. Published

    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

  47. Published

    Gill ventilation and oxygen extraction during graded hypoxia in 2 ecologically distinct species of flatfish, the flounder (Platichthys flesus) and the plaice (Pleuronectes platessa)

    Steffensen, John Fleng, LOMHOLT, J. & JOHANSEN, K., 1982, In: Environmental Biology of Fishes. 7, 2, p. 157-164

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

  48. Published

    An automated swimming respirometer

    Steffensen, John Fleng, JOHANSEN, K. & BUSHNELL, P., 1984, In: Comparative Biochemistry and Physiology A. 79, 3, p. 437-440

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

  49. Published

    Ventilation and oxygen consumption in the hagfish, Myxine glutinosa L.

    Steffensen, John Fleng, JOHANSEN, K., SINDBERG, C., Sørensen, J. H. & Møller, J. L., 1984, In: Journal of Experimental Marine Biology and Ecology. 84, 2, p. 173-178

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

  50. Published

    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

  51. Published

    The Transition between Branchial Pumping and Ram Ventilation in Fishes: Energetic Consequences and Dependence on Water Oxygen Tension

    Steffensen, John Fleng, 1985, In: Journal of Experimental Biology. 114, p. 141-150

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

  52. Published

    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

  53. Published

    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

  54. Published

    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

  55. Published

    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

  56. Published

    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

  57. Published

    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

  58. Published

    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

  59. Published

    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

  60. Published

    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

  61. Published

    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

  62. Published

    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

  63. Published

    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

  64. Published

    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

  65. Published

    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

  66. Published

    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

  67. Published

    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

  68. Published

    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

  69. Published

    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

  70. Published

    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

  71. Published

    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

  72. Published

    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

  73. Published

    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

  74. Published

    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

  75. Published

    Energetic cost of active branchial ventilation in the sharksucker, Echeneis naucrates.

    Steffensen, John Fleng & Lomholt, J. P., 1983, In: Journal of Experimental Biology. 103, p. 185-92 7 p.

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

  76. Published

    The relative importance of skin oxygen uptake in the naturally buried plaice, Pleuronectes platessa, exposed to graded hypoxia.

    Steffensen, John Fleng, Lomholt, J. P. & Johansen, K., 1981, In: Respiratory Physiology & Neurobiology. 44, 3, p. 269-75 6 p.

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

  77. Published

    Cutaneous oxygen uptake and its relation to skin blood perfusion and ambient salinity in the plaice, Pleuronectes platessa.

    Steffensen, John Fleng & Lomholt, J. P., 1985, In: Comparative Biochemistry and Physiology - Part A: Comparative Physiology. 81, 2, p. 373-5 2 p.

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

  78. Published

    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

  79. Published

    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

  80. Published

    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

  81. Published

    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

  82. Published

    Effects of Environmental Hypoxia. In: Modeling Nutrient Loads and Response in River and Estuary Systems

    Steffensen, John Fleng & Randall, D., 2005, NATO/CCMS Pilot Study. 271 ed. p. 32-37

    Research output: Chapter in Book/Report/Conference proceeding › Report chapter › Research

  83. Published

    Respiratory Systems and Metabolic Rates.

    Steffensen, John Fleng, 2005, The Physiology of Polar Fishes. Farrell, A. & Steffesen, J. (eds.). 22 ed. Academic Press, p. 203-238 (Fish Physiology).

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

  84. Published

    Fiskene i de danske farvande

    Steffensen, John Fleng, 2006, HAVET: Naturen i Danmark. Fenchel, T. (ed.). Gyldendal, p. 255-310

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Communication

  85. Published

    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

  86. Published

    Ventilatory and respiratory responses in fish: adaptations to environment

    Steffensen, John Fleng, 1992, The Vertebrate Gas Transport Cascade: Adaptations to the environment and Mode of Life. CRC Press, p. 60-71

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

  87. Published

    The secondary vascular system

    Steffensen, John Fleng & Lomholt, J. P., 1992, Fish Physiol., XIIA. Academic Press, p. 185-217

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

  88. Published

    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

  89. Published

    Oxygen consumption of fish exposed to hypoxia: Are they all oxyregulators or are any oxyconformers?

    Steffensen, John Fleng, 2007, Fish Physiology, Toxicology, and Water Quality: Proceedings of the Ninth International Symposium, Capri, Italy, April 24-28, 2006. Brauner, C. J., Suvajdzic, K., Nilsson, G. & Randall, D. (eds.). Ecosystems Research Divison Athens, Georgia, p. 239-244

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

  90. Published

    RELATION BETWEEN STRESS COPING STYLE, LARVAL DEVELOPMENT AND TIME TO EMERGANCE IN RAINBOW TROUT (ONCORHYNCHUS MYKISS)

    Steffensen, John Fleng, 2010.

    Research output: Contribution to conference › Conference abstract for conference › Research

  91. Published

    Fast-starting for a breath: Air breathing in Hoplosternum littorale

    Steffensen, John Fleng, 2012. 1 p.

    Research output: Contribution to conference › Conference abstract for conference › Research

  92. Published

    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

  93. Published

    ENERGETIC EXTREMES IN A HOSTILE HABITAT: FISH LOCOMOTION ON WAVE-SWEPT CORAL REEFS

    Steffensen, John Fleng, 2010.

    Research output: Contribution to conference › Conference abstract for conference › Research

  94. Published

    Komparative studier af hvid- og rødblodede antarktiske fisks fysiologi og kardiovasculære anatomi.

    Steffensen, John Fleng, 2008, Dansk Ekspeditionsfond - Galathea 3 2006-2007. 1. ed. Dansk Ekspeditionsfond Galathea 3 og Thaning & Appel, p. 200-204

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Communication

  95. Published

    Energetics of swimming of schooling fish

    Steffensen, John Fleng, 2012.

    Research output: Contribution to conference › Conference abstract for conference › Research

  96. Published

    In vivo near real time imaging of oxygen partial pressures in the glass catfish (Kryptopterus bichirris)

    Steffensen, John Fleng, 2012.

    Research output: Contribution to conference › Conference abstract for conference › Research

  97. Published

    The whole blood oxygen binding properties of a large but presumably sluggish polar elasmobranch, the Greenland shark Somniosus microcephalus

    Steffensen, John Fleng, 2012.

    Research output: Contribution to conference › Conference abstract for conference › Research

  98. Published

    DIFFERENCES IN POST HATCH METABOLIC RATE AND DEVELOPMENTAL RATE IN ATLANTIC SALMON (SALMO SALAR L): EVIDENCE FOR COMPENSATORY GROWTH?

    Steffensen, John Fleng, 2010.

    Research output: Contribution to conference › Conference abstract for conference › Research

  99. Published

    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

  100. Published

    THE EFFECT OF HYPOXIA ON THE MAXIMUM MATABOLIC RATE AND SPECIFIC DYNAMIC ACTION IN ATLANTIC COD Gadus morhua.

    Steffensen, John Fleng, 2010.

    Research output: Contribution to conference › Conference abstract for conference › Research

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