EVALUATION OF DIFFERENT SOYBEAN SOURCES AS AN INGREDIENT IN PRACTICAL DIETS FOR PACIFIC WHITE SHRIMP Litopenaeus vannamei

G.A.H.S. Chathuranga*, Xuan Qiu, Anneleen Swanepoel, D. Allen Davis
School of Fisheries, Aquaculture and Aquatic Sciences
Auburn University, AL, USA 36849-5419
hsg0009@auburn.edu
 

Solven extracted soybean meal (SBM) is generated using different varieties of soybeans grown under a range of conditions and then processed at different crushing plants. Due to its competitive cost and availability, it is a popular plant base protein source for shrimp feed formulations. However, there is limited information on the effect to variations in these meals on performances of shrimp. Hence, the present study was designed to determine the effects of different soybean sources on the growth performances of L.vannamei. Two growth trials were conducted with iso-nitrogenous and iso-lipidic (350 g/kg protein and 80 g/kg lipid) test diets formulated with twenty-five soybean sources. Trial one incorporated 14 treatments including a soy based diets containing 517 g/kg SBM  (eight replicates) and this soy source was then replace with 13 different soybean sources (four replicates). The second trial used the same basal diet and 11 soybean sources (Total 12 diets) with five replicates. Both of the growth trials were operated with the stocking density of 10 shrimps/aquarium in a semi-recirculatory system and the initial weight of shrimp for trials 1 and 2 were 0.23 g ± 0.02 and 0.67 g ± 0.02 respectively. During the two trials, shrimp were fed four time/day assuming a FCR of 1.8, over 42 days for trial 1 and 35 days for trial 2. As per the statistical analysis, no significant differences were found for the growth performances of shrimps at trial one except for FCR, while in trial two significant difference were observed in most parameters (Table 1). Individual and combined results of the growth trials will be presented along with data on possible correlations to biochemical composition of the meals.