6533b7d7fe1ef96bd1268fb9

RESEARCH PRODUCT

Genetic structuring in Atlantic haddock contrasts with current management regimes

Per Erik JordeKnut KorsbrekkeJon-ivar WestgaardGjert Endre DingsørJohn B. TaggartJon Egil SkjæraasenKevin A. GloverPaul R. BergPaul R. BergGeir DahlePeter J. WrightHalvor KnutsenSteven X. Cadrin

subject

0106 biological sciences0301 basic medicinePopulation geneticsAquatic ScienceOceanography010603 evolutionary biology01 natural sciencesStructuringGenetic population structure of fish in the North AtlanticFiskeriforvaltningGenetic diversity03 medical and health sciencesVDP::Genetikk og genomikk: 474Fisheries ManagementGenetisk populasjonsstruktur hos fisk i NordatlanterenEcology Evolution Behavior and SystematicsEcologybiologyHaddockbiology.organism_classificationFishery030104 developmental biologyGeographyCurrent managementHyseGenetisk diversitetPopulasjonsgenetikkHaddock

description

AbstractThe advent of novel genetic methods has made it possible to investigate population structure and connectivity in mobile marine fish species: knowledge of which is essential to ensure a sustainable fishery. Haddock (Melanogrammus aeglefinus) is a highly exploited marine teleost distributed along the coast and continental shelf on both sides of the North Atlantic Ocean. However, little is known about its population structure. Here, we present the first study using single-nucleotide polymorphism (SNP) markers to assess the genetic population structure of haddock at multiple geographic scales, from the trans-Atlantic to the local (fjord) level. Genotyping 138 SNP loci in 1329 individuals from 19 locations across the North Atlantic revealed three main genetic clusters, consisting of a Northwest Atlantic cluster, a Northeast Arctic cluster, and a Northeast Atlantic cluster. We also observed a genetically distinct fjord population and a pattern of isolation by distance in the Northeast Atlantic. Our results contrast with the current management regime for this species in the Northeast Atlantic, as we found structure within some management areas. The study adds to the growing recognition of population structuring in marine organisms in general, and fishes in particular, and is of clear relevance for the management of haddock in the Northeast Atlantic.

yearjournalcountryeditionlanguage
2020-12-13
10.1093/icesjms/fsaa204https://hdl.handle.net/11250/3045840