Evaluating the performance of Pacific white shrimp (Penaeus vannamei Boone, 1931) reared under different stocking densities: a study of their biochemical …

چکیده مقاله

In the present study, the effects of different stocking densities on growth performance, hemolymph biochemical and immune indices, as well as on the metabolic and antioxidant enzyme activities in the hepatopancreas of Pacific white shrimp (Penaeus vannamei) were investigated in a biofloc aquaculture system. For the experiment, juvenile shrimp with an initial weight of 3.85 +/- 0.34 g were cultured for 35 days in 150 L fiberglass tanks under limited water exchange. Four treatments featuring different stocking densities (0.308, 0.616, 0.924, and 1.23 g/L) were implemented and designated as SD1, SD2, SD3, and SD4, respectively. Results indicated that as the stocking density increased, the final weight, shrimp survival rate, and feed efficiency decreased. Notably, in the SD4 treatment, the shrimp recorded the lowest values: a final weight of 7.01 g, a survival rate of 88.19%, and a feed efficiency of 44.59% (P < 0.05 …