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Use of High Content Fish Silage Wet Food in Final Growth out of PacQ （piaractus mesopotamicus, Holmberg 1887）in Northeast Argentina

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Journal of Agricultural Science and Technology(B) 2012年第3期2卷 307-311页

作者： Gustavo Wicki Oscar Galli Merino Pablo Calo Facundo Sal Centro Nacional de Desarrollo Acuicola （CENADAC） Direccion de Acuicultura-SAGPyA Paseo Colon 982 Anexo Pesca 1063Bs.As. Argentina

The effect of two diets containing fish acid silage were studied, the first one offered as dry diet and the second one as a wet diet, in final culture cycle of PactS. Previous experiences showed that diets without fishmeal maintain same growth rate in semi intensive system, compared to diets containing 8% and 20% fish meal. Feeding trials were carried out in CENADAC （27°32′ S, 58030＇ W） in a semi intensive pond culture system for 122 days. Two experimental feed including fish silage, a liquid product obtained of fish residues treated by enzymes action, were formulated. Fish silage was prepared by mincing and blending fish viscera with sufficient formic acid （2.11% v/w） to attain a stable pH of 3.5. Fish were daily fed initially with the dry ration at 1.3% bw/d and at a rate of 0.55 g of protein/100 g of fish with the wet ration. At the end of the experience the average weight observed for dry fed fish was 1,513.5 g and 1,560.3 g for those wet fed. The daily growth was 3.69 g/d for the first group and 3.9 g/d for the second one. The final FCR was 2.72 and 3.01 for each group without significant differences. These results showed that it is possible to grow out paco with wet self made feed without fish meal and with similar growth that those fed dry diet.

关键词： piaractus mesopotamicus feed fish acid silage.

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