Replacing fishmeal with blends of alternative proteins on growth performance of rainbow trout (Oncorhynchus mykiss), and early or late stage juvenile Atlantic salmon (Salmo salar)

Published source details Burr G.S., Wolters W.R., Barrows F.T. & Hardy R.W. (2012) Replacing fishmeal with blends of alternative proteins on growth performance of rainbow trout (Oncorhynchus mykiss), and early or late stage juvenile Atlantic salmon (Salmo salar). Aquaculture, 334-337, 110-116.
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This study is summarised as evidence for the following.

	Action	Category
	Use an alternative protein source: plant-based Action Link

Use an alternative protein source: plant-based

A controlled study comprising of two trials in the USA (Burr et al., 2012) found varied results in final body weight when feeding different stage fingerling salmon, Salmo salar, plant-based protein diets compared to a fish meal control. Trial one found early stage fingerlings fed a plant protein diet had lower average final body weights (19.23-22.97g) compared to the control (27.29g). Trial two found that late stage fingerlings had similar final average body weights across all diets. Survival rates ranged from 92.4-96.3% and were similar across all treatment groups. In trial one, 50 early stage fingerling salmon were fed six experimental diets prepared using plant protein blends (soybean, maize gluten, wheat gluten). Plant protein was added to five diets in increasing increments (50%, 66% and 84%) to substitute fish meal. The control diet contained fish meal only. Feeding took place over 18 weeks, using automated feeders. In trial two, 112 late stage fingerling salmon were fed diets containing 100% plant protein blend for 12 weeks. All fish were bulk weighed and counted every four weeks during the study