Journal
CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
Volume 33, Issue 3, Pages 696-704Publisher
SCIENCE PRESS
DOI: 10.1007/s00343-015-4093-y
Keywords
Nile tilapia; thermal acclimatization; metabolism; enzymes
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Funding
- Deanship of Scientific Research at King Saud University [RGP-VPP-304]
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The effects of rearing temperature on white muscle and hepatic phosphofructokinase (PFK), pyruvate kinase (PK), lactate dehydrogenase (LDH), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were examined in fingerlings of blue tilapia, Oreochromis aureus. The experiment was conducted for 14 weeks at temperatures of 18, 22, 26, 30, and 34A degrees C. The activity of the glycolytic enzymes PFK, PK, and LDH in white muscle increased significantly with increase in water temperature. A reverse trend was observed for these enzymes in the liver, except for LDH, which behaved in the same manner as in white muscle. Cytosolic AST and ALT activity increased in both white muscle and liver in response to warm thermal acclimatization, while a reduction in mitochondrial AST and ALT activity was noticed at high temperatures in comparison with those at a lower temperature.
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