Effects of diets with different plant proteins on the performance of silver perch (Bidyanus bidyanus Mitchell) and on water quality in earthen ponds

Autor:	David Glendenning, Charles Mifsud, Philip Read, Geoff L Allan, Stuart J Rowland, Brett A. Ingram
Rok vydání:	2007
Předmět:	Perch food.ingredient biology business.industry Aquatic Science Blood meal biology.organism_classification Feed conversion ratio Biotechnology food Fish meal Animal science Aquaculture Palatability Bidyanus bidyanus business Canola
Zdroj:	Aquaculture Research. 38:748-756
ISSN:	1365-2109 1355-557X
DOI:	10.1111/j.1365-2109.2007.01727.x
Popis:	As part of a project to develop least-cost diets with low levels of fish meal, silver perch (Bidyanus bidyanus Mitchell) fingerlings (mean weight, 11.8 g) were stocked at a density of 7500 fish ha−1 into 0.1-ha earthen ponds and fed one of two diets containing 33% digestible protein, 13 MJ kg−1 digestible energy, similar nutrient specifications, but with different levels of fish meal and plant proteins. The reference diet SP35 had 27% fish meal, 28% wheat, 20% soybean and 11% sorghum, while the diet silver perch least-cost (SPLC) had 10% fish meal, 20% peanut meal, 19% wheat, 17% lupins, 16% canola, 8% soybean and 5% blood meal; there were three replicate ponds for each diet. Fish were fed a restricted ration up to 5% body weight day−1 and cultured for 10 months. Survival ranged from 85.9% to 94.3% and was not affected by diet. The mean weight (550 g), specific growth rate (SGR; 1.28% day−1), absolute growth rate (AGR; 1.9 g fish−1 day−1) and production rate (4.5 tonnes ha−1 year−1) were significantly higher (P
Databáze:	OpenAIRE
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