Replacement of soybean meal by peanut meal in diets for juvenile Nile tilapia, Oreochromis niloticus

Abstract

ABSTRACT. The use of alternative feeds aims to maintain productivity and reduce animal production costs. This objective of this study was to determine the nutritional value of peanut meal (PNM), as well as replacement of soybean meal (SBM) by PNM in diets for Nile tilapia, Oreochromis niloticus. To determine the apparent digestibility coefficients (ADC) of nutrients from the PNM, 40 fish (100 ± 4.3 g) were randomly distributed in four 250 L tanks and fed reference and test diets (50% PNM) plus 0.1% chromic oxide. Feces were collected by modified Guelph system. For the growth performance trial, 180 fish (13.4 ± 0.2 g) were randomly distributed in 30 200 L tanks and fed during 90 days with isoproteic (26.8% digestible protein) and isoenergetic (17.6 kJ g -1 digestible energy) diets containing replacement levels of 0, 25, 50, 75 and 100% of SBM digestible protein by PNM digestible protein. The experimental design was completely randomized with five treatments and six replicates. The ADC for protein from PNM was 90.9% whereas the ADCs for essential amino acids ranged from 88.7% for lysine to 97.6% for arginine. The feed conversion ratio was significantly affected when the SBM was totally replaced by PNM. The protein efficiency ratio, protein retention and whole-body protein content significantly decreased in fish fed diets containing PNM levels above 25% of PNM. Therefore, PNM can replace up to 25% of SBM without impairing juvenile Nile tilapia growth performance, feed efficiency, and body composition.

Application of Non-Aflatoxigenic Aspergillus flavus for the Biological Control of Aflatoxin Contamination in China

“…To reduce the biocontrol cost and effectively use peanut byproducts, this study used peanut meal and liquid seed coating as substrates; the peanut meal improved the ratio of non-AF A. flavus strains in soils at harvest to an average of 69.72% and reduced aflatoxin contamination by 67.54% in peanuts during storage compared with untreated fields ( Table 1 and Table 3 ). Additionally, peanut meal, as the byproduct of peanut oil, is also a good source of plant protein and contains high concentrations of energy components [ 42 ], having been used as animal feed (i.e., fish and pig) [ 43 , 44 ]. This is the first time that peanut meal has been used as the substrate to make biocontrol products for aflatoxin contamination in peanut fields.…”

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

“…Fewer studies have been done on replacing soybean meal in most fish feeds, except a trial to use peanut meal as an alternative to soybean meal in Nile tilapia feeds [8]. Soybean meal protein is mostly utilized in African aquaculture diets for omnivorous fish species, such as tilapias (Oreochromis species) and catfish (Clarias species).…”