Comparative Analysis of Nutritional and Biotechnological Value of Muscle Tissue of Mesopelagic Fishes of the North-East Atlantic Region.

A comparative analysis of some nutritional and biotechnological characteristics of muscle tissue of the most widespread and abundant mesopelagic fish species inhabiting the Irminger Sea (North Atlantic) was carried out. At the level of lipid metabolism, potential nutritional value was established for non-commercial Notoscopelus kroyeri and Serrivomer beanii along with the commercial beaked redfish Sebastes mentella. For Lampanyctus macdonaldi and, partially, Borostomias antarcticus, possible biotechnological value was shown in terms of extracting individual valuable molecules and substances of lipid nature. The other studied species (Bathylagus euryops, Chauliodus sloani, Malacosteus niger, Scopelogadus beanii, and Stomias boa), as well as B. antarcticus, are very promising for their use in aquaculture in the development of innovative feed compositions and additives for them. It was found that the depth and area of catch don't have a significant effect on the nutritional and biotechnological characteristics of the muscle tissue of the studied species. The exception is B. euryops, the characteristics under consideration of which vary depending on the area of catch; for S. mentella and S. beanii, on the depth of catch. The results of the study can serve as a basis for the development and improvement of methods and protocols for sustainable use of deep-sea biological resources in the process of their development in the North Atlantic region, as well as determine the areas of practical use of these species and the format of products obtained from them or with their use (feed, additive, pure substance, composition, functional food product, etc.).