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Growth and feed efficiency of juvenile shrimp Litopenaeus vannamei fed formulated diets containing different levels of poultry by-product meal |
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| Authors: | Shuyan Chi Beiping Tan Kangsen Mai Shixuan Zheng |
| Institution: | 1. Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, P R. China;Laboratory of Aquatic Economic Animal Nutrition and Feed, Guangdong Ocean University, Zhanjiang 524025,P. R. China 2. Laboratory of Aquatic Economic Animal Nutrition and Feed, Guangdong Ocean University, Zhanjiang 524025,P. R. China 3. Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, P R. China 4. Zhanjiang Yuehai Feed Co. Ltd., Zhanjiang 524000, P R. China |
| Abstract: | This feeding trial was conducted to evaluate the potential of poultry by-product meal (PBM) as a protein source in the culture ofLitopenaeus vannamei. Seven isonitrogenous and isoenergetic diets were formulated to near to commercial diet with about 40% protein and 7.5% lipid. Fish meal was replaced by 0, 30%, 40%, 50%, 60%, 70% and 100% of PBM (diets 1-7). The diet with 100% fish meal was used as a control (diet 1). Post-larvae were reared in an indoor semi-closed re-circulating system. Each dietary treatment was tested in 4 replicate tanks (260 L) of 40 shrimp, arranged in a completely randomized design. The shrimps were hand-fed for three times a day to near-satiation (0700, 1200 and 1800) for 60d. Percentage weight gain, survival, feed conversion ratio (FCR), protein efficiency ratio (PER) and body composition of shrimps were measured. There were no significant differences (P>0.05) in growth performance among shrimps fed diets 1-5 (0-60% fish meal replacement). However, shrimps fed diet 7 (100% fish meal replacement) had significantly lower (P<0.05) growth than those fed diets 1-5 (0-60% fish meal replacement). Shrimp fed diets 2-4 (30%-50% fish meal replacement) showed significantly higher growth than those fed diets 6 and 7 (70% and 100% fish meal replacement, respectively). Survival ranged from 94.7% to 100.0% and did not differ significantly (P>0.05) among different experimental diets. No differences in body composition were found among shrimps fed different diets. These results showed that up to 70% of fish meal protein can be replaced by PBM without adversely affecting the growth, survival, FCR, PER and body composition of Litopenaeus vannamei. |
| Keywords: | Litopenaeus vannamei poultry by-product meal fish meal replacement |
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