Effects of three different dietary plant protein sources as fishmeal replacers in juvenile whiteleg shrimp, Litopenaeus vannamei

• Published in: Fisheries and aquatic sciences Vol. 23; no. 1; pp. 1 - 6
• Main Authors: Bae, Jinho, Hamidoghli, Ali, Djaballah, Marouane Sad, Maamri, Salha, Hamdi, Ayoub, Souffi, Ismail, Farris, Nathaniel Wesley, Bai, Sungchul C.
• Format: Journal Article
• Language: English
• Published: Springer 30-01-2020; The Korean Society of Fisheries and Aquatic Science; 한국수산과학회
• Subjects: Fermentation; fishmeal; Lysozyme; sesame meal; soybean meal; Soybeans; Superoxides; whiteleg shrimp; 수산학; South Korea
• ISSN: 2234-1757; 2234-1749; 2234-1757
• DOI: 10.1186/s41240-020-0148-x

Background As the cost of fishmeal continues to rise, there will be a need to optimize the diet by minimizing dietary fishmeal inclusion in aquafeed. In this study, a 7-week experiment was conducted to evaluate soybean meal, fermented soybean meal (soytide), and sesame meal as fishmeal replacers in whiteleg shrimp, Litopenaeus vannamei. Methods A 30%-based fishmeal diet was considered as control (CON), six other diets were prepared by replacing 20% or 40% of fishmeal with soybean meal (SB.sub.20 and SB.sub.40), fermented soybean meal (ST.sub.20 and ST.sub.40), or sesame meal (SM.sub.20 and SM.sub.40) from the CON diet. Twenty shrimp with average initial weight of 0.65 [+ or -] 0.05 g (mean [+ or -] SD) were randomly distributed into 21 tanks (45 L) and fed four times a day. Water temperature was controlled at 28 [+ or -] 1 [degrees]C and aeration was provided by air stones. Results Weight gain, specific growth rate, feed efficiency, and protein efficiency ratio of shrimp fed CON showed no significant differences compared to shrimp fed all the other diets. However, growth performance of shrimp fed ST.sub.20 diet was significantly higher than those of shrimp fed the SM.sub.20 and SM.sub.40 diets (P < 0.05). Superoxide dismutase activity (SOD) of shrimp fed CON, ST.sub.20, and ST.sub.40 diets was significantly higher than those of shrimp fed the SB.sub.40 and SM.sub.40 diets. But there were no significant differences among shrimp fed CON, SB.sub.20, ST.sub.20, ST.sub.40, and SM.sub.20 diets. Also, lysozyme activity of shrimp fed ST.sub.20 diet was significantly higher than those of shrimp fed the SB.sub.40 and SM.sub.40 diets. Although, lysozyme activity of shrimp fed the CON diet was not significantly different compared to shrimp fed all the other experimental diets. Conclusions Therefore, SB, ST, and SM could replace 40% of fishmeal based on growth performance and lysozyme. According to the SOD activity, SB and SM could replace 20% of fishmeal and ST could replace 40% of fishmeal in juvenile whiteleg shrimp Litopenaeus vannamei. Keywords: Fishmeal, Soybean meal, Fermentation, Whiteleg shrimp, Sesame meal