Randomized trial assessed how physiological and molecular responses affect thermal tolerance in common carp, suggesting new aquaculture temperature guidelines.
Key Points
The study aims to explore how physiological and molecular responses relate to thermal tolerance in common carp.
Common carp were subjected to rapid temperature changes from 25 °C to 13–37 °C at 3 °C h−1 (n = 10 per treatment).
Parameters like cortisol, blood counts, serum biochemistry, and opercular movement were measured.
HSC70-2 gene expression levels were analyzed in various tissues.
Cortisol levels increased significantly at 37 °C (p < 0.05), indicating heat-induced stress.
Physiological disturbances were noted with immediate changes in blood count parameters upon temperature deviation.
HSC70-2 expression showed crucial shifts at 17 and 27 °C (p < 0.05), indicating molecular inflection points.