USE OF BLACK SOLDIER FLY (Hermetia illucens) MEAL IN RAINBOW TROUT (Oncorhynchus mykiss) FEEDS

A key aspect of the sustainability of aquaculture industry is the supply of proteins for aqua feeds as fish meal (FM) is considered a finite resource and has reached very high price (Hardy, 2010). Several alternative have been tested in the past decades and nowadays FM represent only about 10 to 20% of the feed for carnivorous aquaculture species, the rest of protein supply being covered mainly by vegetable proteins (Jobling, 2015). Nevertheless, even if a complete substitution of FM by plant proteins is feasible, it has been highlight that adverse effect can occur for many reasons among which, their content of anti-nutritional factors, unpalatable compounds, inappropriate fatty acid profile, shortage of essential amino acid, and problems related to the inflammation of the digestive tract (Jobling, 2015). At present the interest of researchers about insect meal is increasing. Some studies have been carried out in order to evaluate the use of insect mealsin diets for fish because of their high protein content and since insects are often included in natural fish diets. Recent reviews have highlighted how some insect larvae derived mealscan successful be used in fish diets (Barroso et al., 2014; Makkaret al., 2014; Henry et al., 2015) but new research are requested to confirm these data. As among insect species investigated, black soldier fly (BSF -Hermetia illucens ) meal seems a good candidate due to its valuable nutritional properties, the aim of thisresearchwas to investigate the effects of the inclusion of a defatted BSF in rainbow trout feed on performances, somatic indexes, and some slaughtering and quality parameters.