Black Soldier Fly Larvae compost a diverse range of food waste streams and their prepupae (tough shell-covered bodies that look a bit like woodlice) are then a resource-efficient and high nutrient substitute for wild-catch fishmeal (highly unsustainable) that could have a significant beneficial economic and environmental impacts.
Black Soldier Fly Larvae (BSFL) as a feed have been trialled extensively on the small scale for over 30 years, and are found to be a compelling potential commercial feedstuff for other food-animals. When dried (for easy storage) the prepupae (BSFP) contain 42% protein and 35% fat. In combination with other ingredients, BSFP have been trialled successfully as a feed for rainbow trout and catfish achieving good growth and health results. Studies indicate that BSFP can replace >25% of a fish meal in a diet with no negative effect on growth in rainbow trout and in channel catfish. insects could be legally used in fish feeds in Europe as early as next July after the EU voted in December to accept proposed amendments to legislation governing farmed insects used in animal feeds. Not that we were worried – Food safety and bacterial considerations for using this feed are so far favorable. In China, the USSR, USA, Mexico and Eastern Europe BSFP have been fed to poultry, pigs, shrimp, various species of fish, turtles and frogs – no problems. Moreover anti-microbial factors were recorded reducing the chance of feed transmitting pathogens wherein BSFL have been shown to significantly reduced E. coli 0157:H7 and Salmonella enterica in hen manure (pretty good going).