PROCESSING OF CAMELINA SATIVA OILSEED TO EVALUATE DIGESTIBILITY FOR POTENTIAL INCLUSION IN DIETS FOR COLDWATER CARNIVOROUS FISH.

Abstract

Camelina sativa is an oilseed with potential to be processed into several novel plant-based protein or lipid rich by-products for use in fish feeds. Digestibility values are needed to formulate balanced diets using these feedstuffs. Camelina full fat seed, oil, expelled meal (HORM), and solvent extracted meal (SEM) were developed. Apparent digestibility values were determined for Atlantic cod (AC), Atlantic salmon (AS), and rainbow trout (RT). Digestible protein (DP; %) content was established for the seed, HORM, and SEM for the AC (23.0, 32.6, 34.1, respectively), AS (23.9, 33.4, 35.6, respectively) and RT (21.7, 33.4, 35.2, respectively). Digestible energy (DE; kcal/kg) content was established for the oil (AC, 6596; AS, 8524; RT, 8063). There was no effect from toasting SEM for RT. Water and phytase enzyme pre-treatment of SEM for 24 hours removed the glucosinolates and phytate completely (RT; DP, 35.44%; DE, 3185 kcal/kg). Based on digestibility values, these products show good potential for use in aquaculture feeds.