Summary
This aquaculture study investigated physiological and molecular responses of grass carp to overwintering conditions, measuring changes in body composition, antioxidant defence systems, and fatty acid profiles alongside expression patterns of metabolic genes. The research contributes to understanding how seasonal environmental stress (winter) affects fish nutritional quality and metabolic status. Such findings may inform hatchery management and feeding strategies for farmed grass carp in temperate aquaculture systems.
Regional applicability
Grass carp aquaculture is not widely practised in the United Kingdom; the species is more common in Asian and some European aquaculture systems. However, findings on overwintering stress responses may have relevance to other farmed fish species in UK temperate waters and inform best practice in cold-water aquaculture management.
Key measures
Body composition, antioxidant enzyme activities (likely superoxide dismutase, catalase, glutathione peroxidase), fatty acid composition (individual and total PUFA/MUFA/SFA), gene expression related to glucose and lipid metabolism
Outcomes reported
The study examined how overwintering (winter storage/dormancy) affects body composition, antioxidant enzyme activity, fatty acid profiles, and expression of genes related to glucose and lipid metabolism in grass carp (Ctenopharyngodon idellus). The research measured multiple physiological and molecular markers to characterise metabolic changes during the overwintering period.
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