Effect of dietary lysine and genetics on growth and indices of lysine catabolism in rainbow trout (Oncorhynchus mykiss)

The level of the essential amino acid lysine is of concern in trout feed. The objective of this study was to investigate the response of different families of fish to lysine-deficient (LD) versus lysine-adequate (LA) soy protein-containing diets. For each treatment combination, there were five replicates. As expected, feed efficiency (p < .0001) and thermal growth coefficient (TGC, p < .0001) were improved in fish fed the LA compared to the LD...