Effect of Agricultural By-Products as a Carbon Source in a Biofloc-Based System on Growth Performance, Digestive Enzyme Activities, Hepatopancreas Histology, and Gut Bacterial Load of Litopenaeus vannamei Post Larvae

The present study evaluated the influence of different commercial agricultural by-products as a carbon source in bifloc-based (BFT) culture system on growth performance, whole-body proximate composition, digestive enzyme activities, gut microbial abundance, and hepatopancreas histology Pacific whiteleg shrimp, Litopenaeus vannamei post larvae (Pls). Three groups were designed, first group was control group, where shrimp reared clear water (without addition exchange rate 100% two times week) fed with diet, second third BFT systems using sources, sugarcane bagasse (SB) rice bran (RB) without additional feeding or exchange. initial stocking density 16 Pls/liter an average individual weight 0.01 ± 0.002 g age (PL20). experiment lasted 90 days. quality parameters maintained at optimum levels during experiment. final body specific significantly (p ? 0.01) higher than those both SB RB-based BFT. Meanwhile, survival < 0.05) control. protease activity stomach did not differ significantly. protease, lipase, amylase intestine showed significant increase obtained group. total heterotrophic bacteria groups. Furthermore, histological status SB-based tubules distal B-cell zones (blister-like cells) by 16.83 34.89%, respectively, compared to This revealed that could be used natural feed artificial diets, which influenced microbiota increased well improved structure shrimp. However, success this conditions under high still needs more investigation.