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

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

Standard

Effects of growth hormone transgenesis on metabolic rate, exercise performance and hypoxia tolerance in tilapia hybrids. / McKenzie, DJ; Martinez, R; Morales, A; Acosta, J; Morales, R; Taylor, EW; Steffensen, JF; Estrada, MP.

In: Journal of Fish Biology, Vol. 63, No. 2, 2003, p. 398-409.

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

Harvard

McKenzie, DJ, Martinez, R, Morales, A, Acosta, J, Morales, R, Taylor, EW, Steffensen, JF & Estrada, MP 2003, 'Effects of growth hormone transgenesis on metabolic rate, exercise performance and hypoxia tolerance in tilapia hybrids', Journal of Fish Biology, vol. 63, no. 2, pp. 398-409. https://doi.org/10.1046/j.1095-8649.2003.00162.x

APA

McKenzie, DJ., Martinez, R., Morales, A., Acosta, J., Morales, R., Taylor, EW., Steffensen, JF., & Estrada, MP. (2003). Effects of growth hormone transgenesis on metabolic rate, exercise performance and hypoxia tolerance in tilapia hybrids. Journal of Fish Biology, 63(2), 398-409. https://doi.org/10.1046/j.1095-8649.2003.00162.x

Vancouver

McKenzie DJ, Martinez R, Morales A, Acosta J, Morales R, Taylor EW et al. Effects of growth hormone transgenesis on metabolic rate, exercise performance and hypoxia tolerance in tilapia hybrids. Journal of Fish Biology. 2003;63(2):398-409. https://doi.org/10.1046/j.1095-8649.2003.00162.x

Author

McKenzie, DJ ; Martinez, R ; Morales, A ; Acosta, J ; Morales, R ; Taylor, EW ; Steffensen, JF ; Estrada, MP. / Effects of growth hormone transgenesis on metabolic rate, exercise performance and hypoxia tolerance in tilapia hybrids. In: Journal of Fish Biology. 2003 ; Vol. 63, No. 2. pp. 398-409.

Bibtex

@article{f6c634b0be9a11df825b000ea68e967b,
title = "Effects of growth hormone transgenesis on metabolic rate, exercise performance and hypoxia tolerance in tilapia hybrids",
abstract = "Swimming respirometry was employed to compare inactive metabolic rate (Rr), maximum metabolic rate (Rmax), resultant aerobic scope and maximum sustainable (critical) swimming speed (Ucrit), in growth hormone transgenic (GHT) and wild-type (W) tilapia Oreochromis sp. hybrids. Although the Rr of GHT tilapia was significantly (58%) higher than their W conspecifics, there were no significant differences in their net aerobic scope because GHT tilapia exhibited a compensatory increase in Rmax that was equal to their net increase in Rr. As a consequence, the two groups had the same Ucrit. The GHT and W tilapia also exhibited the same capacity to regulate oxygen uptake during progressive hypoxia, despite the fact that the GHT fish were defending a higher demand for O2. The results indicate that ectopic expression of GH raises metabolic rate in tilapia, but the fish compensate for this metabolic load and preserve such physiological determinants of fitness as aerobic scope, swimming performance and tolerance of hypoxia.",
author = "DJ McKenzie and R Martinez and A Morales and J Acosta and R Morales and EW Taylor and JF Steffensen and MP Estrada",
note = "Keywords:aerobic scope;citrate synthase;critical swimming speed;lactate;maximum metabolic rate;oxygen uptake",
year = "2003",
doi = "10.1046/j.1095-8649.2003.00162.x",
language = "English",
volume = "63",
pages = "398--409",
journal = "Journal of Fish Biology",
issn = "0022-1112",
publisher = "Wiley-Blackwell",
number = "2",

}

RIS

TY - JOUR

T1 - Effects of growth hormone transgenesis on metabolic rate, exercise performance and hypoxia tolerance in tilapia hybrids

AU - McKenzie, DJ

AU - Martinez, R

AU - Morales, A

AU - Acosta, J

AU - Morales, R

AU - Taylor, EW

AU - Steffensen, JF

AU - Estrada, MP

N1 - Keywords:aerobic scope;citrate synthase;critical swimming speed;lactate;maximum metabolic rate;oxygen uptake

PY - 2003

Y1 - 2003

N2 - Swimming respirometry was employed to compare inactive metabolic rate (Rr), maximum metabolic rate (Rmax), resultant aerobic scope and maximum sustainable (critical) swimming speed (Ucrit), in growth hormone transgenic (GHT) and wild-type (W) tilapia Oreochromis sp. hybrids. Although the Rr of GHT tilapia was significantly (58%) higher than their W conspecifics, there were no significant differences in their net aerobic scope because GHT tilapia exhibited a compensatory increase in Rmax that was equal to their net increase in Rr. As a consequence, the two groups had the same Ucrit. The GHT and W tilapia also exhibited the same capacity to regulate oxygen uptake during progressive hypoxia, despite the fact that the GHT fish were defending a higher demand for O2. The results indicate that ectopic expression of GH raises metabolic rate in tilapia, but the fish compensate for this metabolic load and preserve such physiological determinants of fitness as aerobic scope, swimming performance and tolerance of hypoxia.

AB - Swimming respirometry was employed to compare inactive metabolic rate (Rr), maximum metabolic rate (Rmax), resultant aerobic scope and maximum sustainable (critical) swimming speed (Ucrit), in growth hormone transgenic (GHT) and wild-type (W) tilapia Oreochromis sp. hybrids. Although the Rr of GHT tilapia was significantly (58%) higher than their W conspecifics, there were no significant differences in their net aerobic scope because GHT tilapia exhibited a compensatory increase in Rmax that was equal to their net increase in Rr. As a consequence, the two groups had the same Ucrit. The GHT and W tilapia also exhibited the same capacity to regulate oxygen uptake during progressive hypoxia, despite the fact that the GHT fish were defending a higher demand for O2. The results indicate that ectopic expression of GH raises metabolic rate in tilapia, but the fish compensate for this metabolic load and preserve such physiological determinants of fitness as aerobic scope, swimming performance and tolerance of hypoxia.

U2 - 10.1046/j.1095-8649.2003.00162.x

DO - 10.1046/j.1095-8649.2003.00162.x

M3 - Journal article

VL - 63

SP - 398

EP - 409

JO - Journal of Fish Biology

JF - Journal of Fish Biology

SN - 0022-1112

IS - 2

ER -

ID: 21951226