Development of a new type of fish diet, non-fish meal extruded-pellet
2015
Ishida, N. (National Research Institute of Fisheries Science, FRA, Yokohama (Japan)) | Koshiishi, T. | Tsuzaki, T. | Maeno, K. | Katayama, S. | Satoh, M. | Satoh, S.
We developed a non-fish meal diet using plant and/or animal protein materials. Three kinds of non-fish meal diets and a control diet containing 50% fish meal were processed. In the non-fish meal diets, the fish meal was replaced with commercially available plant or animal materials and supplemented with taurine and materials for maintaining palatability. These diets were fed to one year old yellowtail (BW 753 +- 96g) in net cages. There was no difference in growth, daily weight gain, daily feeding rate, feed conversion ratio and protein efficiency ratio among the diets. Non-fish meal diets were processed in a factory and dietary properties were studied such as uptake, stomach evacuation rate, and comparative disease resistance in fish fed the experimental diets. In addition, palatability of each substitute protein material for fish was examined and materials to enhance palatability of the non-fish meal diets were clarified. Non-fish meal diets have the potential to support the growth of one year old yellowtail.
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