Temperature effects on recovery of Pacific cod following exhaustive exercise

Temperature effects on recovery of Pacific cod following exhaustive exercise

S.K. Hanna, A.H. Haukenes, R.J. Foy, and C.L. Buck

Temperature effects on recovery of Pacific cod following exhaustive exerciseThis is part of Resiliency of Gadid Stocks to Fishing and Climate Change
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We examined post-exhaustive exercise recovery in Pacific cod acclimated to either 2°C or 7°C. We collected blood samples prior to an exhaustive swimming protocol, immediately after and up to four hours of recovery. Plasma concentrations of cortisol, glucose, lactate, Na+, and Cl were determined. Concentrations of cortisol, glucose, and lactate significantly increased post-swim as compared to samples collected pre-swim irrespective of temperature treatment. For either temperature treatment, sample concentrations of cortisol, glucose, and lactate of cod remained elevated and did not return to pre-swim levels after four hours of recovery.

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