The European Commission recognizes the need for developing an improved management framework for deep sea fisheries, which are particularly vulnerable to exploitation and for which little scientific knowledge and data are available.

Recent research has shown that the genetic close-kin mark recapture (CKMR) method can be employed for obtaining fisheries-independent abundance estimates in marine fish, which would be extremely valuable for deep sea stocks. Yet, the viability of the method needs to be evaluated considering the general lack of biological knowledge for deep sea stocks.

In this context, the need of using a better studied species with well-known biology and life-history traits as a target for exploring the viability of the method and required modifications has been suggested. For this reason, although not strictly a deep-sea species, it has been considered that the white anglerfish (Lophius piscatorius) could be a good candidate target species for i) being commercially important, so that the development of the method for this species is directly relevant ii) allowing relative easy sample collection, so that a large number of samples from which to subsample could be obtained, and iii) being sufficiently studied, so that minimum biological and reproductive parameters are known.

Nonetheless, an essential requisite for the successful application of the CKMR method is the knowledge of the population substructure of the target species. Although previous studies have addressed this question for white anglerfish within the Atlantic and suggest homogeneity, additional support is required. Thus, the main objective of the project is to establish the genetic population structure of the white anglerfish across the Atlantic FAO fishing area 27 and to provide a solid baseline for a close-kin abundance estimate.