Farinha de camarão em dietas para o tambaqui (Colossoma macropomum)
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2015-03-03
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Universidade Federal de Goiás
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This study aimed to evaluate the feasibility of replacing soybean meal by shrimp meal in diets for tambaqui. In trial I, the coefficient of total tract apparent digestibility of the dry matter, protein, amino acids, fat, chitin, and organic matter was determined for shrimp meal, while in trial II, the growth performance of tambaqui fed diets containing graded levels of shrimp meal was evaluated. Triplicates groups of Tambaqui fingerlings with 2.7±0.72g mean initial weight were randomly assigned to 20 310L-aquaria and fed five diets that the soybean meal protein was replaced by shrimp meal protein at 0.0, 12.5, 25, 50 and 75%. The parameters evaluated were weight gain, feed intake, feed conversion ratio, specific growth rate, protein efficiency ratio, protein retention and diet with lower valuation was represented by higher replacement. Carcass chemical composition, haematology and serum biochemistry were analysed as well. Chitin seems not to be digested by tambaqui and tended to reduce the CTTAD of dry matter and organic matter. The CTTAD of amino acids were high and correlated to the CTTAD of protein. Fish fed diets containing the 48.6% shrimp showed the highest ash content (P<0.05). Haematology of tambaqui was not affected by shrimp meal inclusion. However, the number of thrombocytes and eosinophils increased in fish fed the diets with the highest shrimp meal level. The gain in weight was low with the highest level of shrimp meal inclusion, however, no effect of shrimp meal inclusion to the diets was observed in others growth parameters. Total serum protein and globulin levels increased according to the increase of shrimp meal levels (P<0,05). In sum, shrimp meal protein seems to be able to replace the soybean meal protein up to 75% in diets for tambaqui without reducing the growth performance or health status. A possible immune enhancer effect of natural chitin from shrimp meal may take place in tambaqui; however further studies are needed to confirm our hypothesis.
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SOUTO, C. N. Farinha de camarão em dietas para o tambaqui (Colossoma macropomum). 2015. 56 f. Dissertação (Mestrado em Zootecnia) - Universidade Federal de Goiás, Goiânia, 2015.