Evaluation of rendered animal protein ingredients for replacement of fish meal in practical diets for gibel carp,Carassius auratus gibelio (Bloch) |
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| Authors: | Menghong Hu Youji Wang Zhi Luo Min Zhao Bangxi Xiong Xueqiao Qian Yujiang Zhao |
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| Institution: | 1. College of Fisheries, Huazhong Agricultural University, Wuhan, Hubei, China;2. Guangdong Haid Farming and Fishery Research Center, Guangzhou, Guangdong, China |
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| Abstract: | A 12‐week feeding trial was carried out in fibreglass tanks to examine partial replacement of fish meal (FM) with poultry by‐product meal (PBM), meat and bone meal (MBM) and blood meal (BM) in practical diets for gibel carp Carassius auratus gibelio (Bloch). Triplicate groups of fish (initial body weight 15.3 g fish?1) were fed eight isonitrogenous (crude protein: 37.5%) and isolipidic diets (crude lipid: 7%). The control diet is the commercial diet of gibel carp, which used 18% of FM as the sole animal protein source. In the other seven diets (Diet 2–Diet 8), 17–83% of FM protein was substituted by a blend of PBM and BM or a blend of PBM, MBM and BM. The final body weight and thermal‐unit growth coefficient of fish fed the feeds in Diet 8 in which 83% of FM protein was replaced by the blend of 3% BM, 10% PBM and 5% MBM is significantly lower than Diet 1 (the control). The feed efficiency ratio in Diet 8 group is significantly lower than Diet 1, 2, 4 and 7 groups. The results of the present study indicated that a combination of PBM, BM and MBM can replace most of the FM protein and the FM level can be reduced to about 6% with satisfactory growth and feed utilization in practical diets for gibel carp. |
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| Keywords: | gibel carp Carassius auratus gibelio (Bloch) fish meal rendered animal ingredients practical diets replacement |
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