World Aquaculture 2023

May 29 - June 1, 2023

Darwin, Northern Territory, Australia

THE EFFECTS OF DIFFERENT SOYBEAN PROTEIN SOURCES ON GROWTH PERFORMANCE, FEED UTILIZATION EFFICIENCY, INTESTINE HISTOLOGY, AND GENE EXPRESSION OF PACIFIC WHITE SHRIMP Litopenaeus vannamei

D. Allen Davis*, Khanh Q. Nguyen, Adela N. Araujo, Trenton L. Corby, Leila M. Strebel, Melanie Rhodes, Timothy J. Bruce

 

School of Fisheries, Aquaculture and Aquatic Sciences

Auburn University

Auburn, AL 36849,

davisda@auburn.edu

 



The goal of this study was to evaluate the impacts of one animal-based diet and four soybean meal sources at different replacement which were the products of solvent-extracted soybean meal with low oligosaccharide (SBM-LO) content, soy protein concentrate (SPC), fermented (FerSBM), and expeller-pressed (EPSBM) process on the growth performance, feed utilization efficiency, intestine histology, and gene expression. The trial was conducted in a green water recirculation system with the stocking density at 30 inds/ tank, at the initial weight of 0.42 ± 0.01 g. Shrimps were fed in eight weeks using four replicate tanks, with eight experimental diets including SBM-LO, SPC, FerSBM at 50% and 100% protein replacement, expeller-pressed soybean meal from at 100% protein replacement, animal diet with 50% fishmeal and 50% meal as protein source, and one basal diet as reference. Trial results revealed significant differences amongst treatments, especially between animal-based and plant-based diets for all growth parameters (p<0.05) except for survival rate (p>0.05). With respect to feed utilization efficiency, we observed interesting trends with significant higher in phosphorus retention for the BrightDay diets. Concerning histomorphology and gene expression, no statistical changes were observed (p>0.05). Based on these findings, more research on different processed soybean sources needs to be done to optimize the diets matrix, diversify the ingredients source for better animal growth performance and optimize profits for practical applications.