Effect of Partial Soybean Replacement by Shrimp By-Products on the Productive and Economic Performances in African Catfish (Clarias lazera) Diets

Abstract

The present study was carried out to evaluate the effects of partial replacement of soybean with shrimp by-products (SBp) in African catfish (Clarias lazera) diets on productive (growth, digestibility, body composition, dressing yield, blood parameters, immunity) and economic performances. Therefore, 750 fingerlings (~20.0 g) were distributed into five groups of 150 fingerlings/group with three replicates (n = 50) per group. Group 1 was fed a basal diet, while G2 and G3 were fed diets containing 25% SBp (autoclaved and acid-treated, respectively) as soybean replacer for 12 weeks, while, in G4 and G5, SBp level was 50%. All growth and nutrient utilization parameters (body weight, Wg, ADG, PER, FCR, and digestibility), plasma proteins, and immunity significantly increased in G4 and G5. Anemia screening markers recorded insignificant differences between the tested groups and control one, whereas lipid markers of plasma and fish body decreased by autoclaved SBp and increased by acid-treated SBp. The African catfish body dry matter and crude protein percentages were enriched by the addition of SBp. Replacing the soybean meal decreases diet costs and diet costs/1 kg of weight gain. In conclusion, replacing soybean with SBp (especially 50% acid-treated) positively influenced productive and economic performances with friendly effects to avoid the environmental pollution by these wastes.

Fish Nutrition and Physiology

“…Besides, shrimp by-product (SBp) has been identified as a possible animal protein source by increasing shrimp production from captures and farms. The study showed that replacing soybean with SBp (especially 50% acid-treated) positively influenced the productive and economic performances of African Catfish (Clarias lazera) [3]. Plant extracts achieved a success in the aquaculture industry as dietary supplements in promoting growth and immunity.…”

Fermentation of rain tree (Samanea saman) seed meal using mixed microbes to improve its nutritional quality

“…According to Qin et al (2022), soybean meal contains high protein with a balanced amino acid composition. Shrimp feed for Litopenaeus vannamei contains the highest composition of vegetable protein (30-35%) (Abu-Alya et al 2021). It is one of the main determinants of the quality of aquaculture production (Nunes et al 2022).…”