Preliminary studies on effect of the supplementation of raw squid liver to extruded pellet on the digestibility of dietary nutrients and the feed performance for rainbow trout [Oncorhynchus mykiss]
2001
Matsuda, Y. (Nippon Suisan Kaisha Ltd., Hachioji, Tokyo (Japan)) | Hayashi, A. | Yoshitomi, B. | Takeuchi, T.
In Japan, 24,000t of squid liver (SL) is disposed every year as waste derived from food processing industry. Present study was conducted to assess the digestibility of dietary nutrients and the feed performance in extruded pellet (EP) containing 20% raw SL on rainbow trout, Oncorhynchus mykiss. The control fish weighing 161.5g on average at the start of the experiment, grew up to 221.6g on average for 34 days feeding, while the fish fed the experimental diet containing 20% raw SL grew from 165.1g to 243.5g on average. Feed efficiency of the control and the fish fed the experimental diet was 0.66 and 0.75, respectively. Also, daily feed intake of the control and the fish fed the experimental diet was 1.6% and 1.8%, respectively. There was no difference in apparent digestibility of dietary protein, lipid and starch between the diets was 92%, 92% and 84%, respectively. These results indicate that EP containing 20% raw SL can be used for rainbow trout.
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