Integrating transcriptomic and metabolomic analysis to understand muscle qualities of red swamp crayfish (Procambarus clarkii) under transport stress.

This study investigated the transport stress (crowding stress and duration) on the physicochemical properties, energy metabolism and antioxidant enzyme activities of the red swamp crayfish (Procambarus clarkii) tail muscle (CTM). Besides, transcriptomic and metabolomic were conducted to elucidate the possible mechanism of CTM alternations during transport stress. The survival rate of crayfish gradually decreased with the external crowding stress and crowding time increasing. The transport stress also led to the increased distance among muscle fibers, water mobility and energy consumption, and the decreased of water holding capacity (WHC), hardness of CTM. The hepatopancreas exhibited more sensitive to crowding stress than muscle. The multi-omics analysis revealed that transport stress could interfere the translation and protein folding functions of ribosomal proteins, fatty acid metabolism and degradation, physiological functions of mitochondria in CTM. This study could provide critical information to increase the understanding of the regulation mechanism of crayfish when subjected to transport stress.