The effects of temperature acclimation on organ/tissue mass and cytochrome c oxidase activity in juvenile cod ( Gadus morhua)

• Published in: Journal of Fish Biology
• Main Authors: Foster, A. R., Hall, S. J., Houlihan, D. F.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1993
• Subjects: Gadus morhua
• Online Access: http://dx.doi.org/10.1111/j.1095-8649.1993.tb00400.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1993.tb00400.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1993.tb00400.x

Cod were acclimated to 5 and 15° C (cold and warm acclimation, respectively) for at least 43 days after which tissue‐somatic indices, tissue protein, DNA content, and cytochrome c oxidase (CCO) activity were measured. Liver, stomach, intestine, total heart and ventricle‐somatic indices were all increased significantly in the cold acclimated animals compared with their warm acclimated counterparts. There were no differences in gill or white muscle‐somatic indices between the acclimation temperatures. Tissue protein concentration (mg protein g tissue −1 ) was generally unaffected by temperature acclimation. Cold acclimation resulted in higher white muscle and lower ventricle CCO specific activities(μmol cytochrome c oxidized min −1 · g tissue −1 ) compared with the respective warm acclimated tissues. No significant differences in CCO specific activity were observed in the remaining tissues (when measured at an intermediate temperature of 10° C). Total tissue CCO activity (measured at an intermediate temperature of 10° C) did not differ significantly between the cold and warm acclimated fish.