Abstract
This study aimed to evaluate the use of protein hydrolysate of poultry by-product and swine liver in the diet of Litopenaeus vannamei and its effect on the intestinal microbiota and on the enzymatic activity of the hepatopancreas. Shrimp (10.94 ± 0.90 g) were fed with diets containing 0%, 25%, 50%, 75% and 100% of replacement of salmon by-product meal by protein hydrolysate, in triplicate. The hepatopancreas enzymatic activity and composition of intestinal microbiota was studied. It was observed that the protein hydrolysate in the diet changed the enzymatic activity of the shrimp when compared to the control group (p < 0.05). Amylase activity increases directly with the percent of protein replacement in the diet. Metagenomic analysis revealed change in the gut biome of the shrimps. The increasing levels of protein replacement provided greater richness in the 75% and 100% treatments, were mainly related to changes in the abundances in the families Rhodobacteraceae and Flavobacteriaceae. A reduction in the abundance of the Vibrionaceae family was observed with the inclusion of protein hydrolysate in the diet. These results indicate that the protein hydrolysate demonstrated beneficial changes when added at concentrations of 25% in the diet of L. vannamei.
Highlights
In aquaculture, most production success is related to the supply of balanced feeds with high nutritional value and good digestibility
This study aimed to evaluate the use of protein hydrolysate of poultry by-product and swine liver in the diet of Litopenaeus vannamei and its effect on the intestinal microbiota and on the enzymatic activity of the hepatopancreas
We hypothesized that the combination of hydrolysates of poultry by-products and swine liver would improve the balance of essential amino acids and, the nutritional value of protein hydrolysate produced to shrimp feed
Summary
Most production success is related to the supply of balanced feeds with high nutritional value and good digestibility. The nutrients contained in some agro-industrial by-products have high nutritional value for animal feed, which supports a good quality diet (Villamil et al, 2017; Kim et al, 2018). PROTEIN HYDROLYSATE OF POULTRY BY-PRODUCT AND SWINE LIVER. We hypothesized that the combination of hydrolysates of poultry by-products and swine liver would improve the balance of essential amino acids and, the nutritional value of protein hydrolysate produced to shrimp feed. The combination of different sources of protein in the same feed, can, in addition to improving the nutritional value, increase its digestibility by the animals that consume it (Castro et al, 2016)
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