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Total replacement of fish meal with animal protein sources in Nile tilapia, Oreochromis niloticus (L.), feeds
Author(s) -
ElSayed AF M
Publication year - 1998
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1046/j.1365-2109.1998.00199.x
Subject(s) - nile tilapia , oreochromis , biology , fish meal , meal , feed conversion ratio , meat and bone meal , tilapia , zoology , food science , shrimp , protein efficiency ratio , fish <actinopterygii> , fishery , body weight , endocrinology
The effects of total replacement of dietary fish meal (FM) with animal protein sources on the growth, feed efficiency and profit indices of Nile tilapia, Oreochromis niloticus (L.), were investigated. Shrimp meal (SM), blood meal (BM), meat and bone meal (MBM), BM + MBM mix and poultry by‐product meal (PBM) replaced FM in six isonitrogenous (30% crude protein), isocaloric (400 kcal GE 100 g –1 ) diets. The diets were fed to O . niloticus fingerlings (12.5 g) to satiation twice a day for 150 days. The growth of fish fed SM, PBM and MBM was not significantly different from those fed the FM‐based diet, while feed conversion and protein efficiency ratios were significantly retarded. Further reduction in fish performance was noticed when BM or BM + MBM replaced FM in the control diet. Cost–benefit analyses of the test diets indicated that these sources were economically superior to FM. The PBM‐based diet produced higher carcass lipid than other diets. Fish fed SM, MBM and PBM diets had significantly higher ash contents ( P < 0.05).