Sustainable fish feed research
The US Dartmouth College’s Class of 1978 Life Sciences building is using several hundred Nile tilapia in an experiment to develop sustainable fish feed.
Tilapia is the second most farmed species in the world by volume and experts are using them help tackle the problem of the diets of farmed raised fish.
Lead researcher, Anne Kapuscini says that farm-raised fish are fed mostly diets consisting of fish oil and meal which is leading to over fishing of anchovy and menhaden and other pelagic species – traditionally used to make the feed.
The researchers hope to make commercial aquaculture diets more sustainable by the use of marine micro-algae.
Their latest experiment seeks to determine what percentage of algae can replace the fish oil currently used in aquaculture diets and still give good fish growth and survival. The experts also want to measure how much it raises omega 3 fatty acids in the flesh of the fish – boosting this could make the tilapia even heathier to eat.