Research into alternatives proteins in aquafeed

rainbow trout

Aquaculture research is studying the effects of replacing fishmeal with blends of alternative proteins in the United States on growth performance of rainbow trout (Oncorhynchus mykiss), and early or late stage juvenile Atlantic salmon (Salmo salar). The purpose of the research was to evaluate alternative proteins as replacements. Nine experimental diets in which protein blends replaced 63 percent, 82  percent  or 100 percent of fishmeal in the formulation (20, 10, and 0 percent fishmeal) were fed to rainbow trout (initial weight 19.5 g) for 12 weeks.

 Weight gains of trout fed diets containing the soy protein concentrate-based blend and the fishmeal control diet were similar, except at the 100 percent fishmeal replacement level, and significantly higher than that of trout fed diets containing the other blends. The soy protein blend and another based on wheat gluten meal were modified slightly and evaluated in early stage Atlantic salmon juveniles (initial weight 5.5 g). Read more ...