New marine ingredients for future salmonid feeds

Abstract

This chapter discusses how to obtain more food and biomass from the oceans in a way that does not deprive future generations of their benefits. In the future, there will be increased competition for natural resources driven by factors such as population growth and climate change. Aquatic foods are increasingly recognised for their key role in food security and nutrition, not just as a source of protein, but also as unique and extremely diverse providers of essential omega-3 long-chain polyun-saturated fatty acids (n-3 LC PUFA) and bioavailable micronutrients. Knowledge related to utilisation of new marine feed resources for aquaculture, like microalgae, macroalgae, zooplankton (copepods, euphausiids), mesopelagic resources, as well as strategies such as integrated multi-tropic aquaculture (IMTA) with marine invertebrates (mussels) and seaweed will be important for sustainable growth and development of this industry. To increase the use of novel resources, new ingredients must meet the requirements of being appropriately nutritious, safe, and available in large quantities, while having a predictable supply chain, and being competitively priced for functional use.