Replicar los datos para: Spatial and temporal stability in the population structure of a marine crab despite the long distance between populations, the presence of a biogeographic break, and the main oceanic currents

10.34691/FK2/VF1R0KVeliz, DavidDavidVeliz0000-0002-5768-9887Universidad de ChileRojas-Hernández, NoemiNoemiRojas-HernándezUniversidad de ChileVega-Retter, CarenCarenVega-Retter0000-0001-9891-3403Universidad de ChileZaviezo, CamilaCamilaZaviezoUniversidad de ChileGarrido, IgnacioIgnacioGarridoUniversidad Austral de ChilePardo, Luis M.Luis M.Pardo0000-0002-8179-5057Universidad Austral de ChileReplicar los datos para: Spatial and temporal stability in the population structure of a marine crab despite the long distance between populations, the presence of a biogeographic break, and the main oceanic currentsRepositorio de datos de investigación de la Universidad de Chile2022Earth and Environmental SciencesVeliz, DavidDavidVelizUniversidad de Chile2022-04-112023-04-0540513776500722162090application/vnd.pg.formattext/plain; charset=US-ASCIItext/plain; charset=US-ASCII1.0CC-BY 4.0Elucidating the processes responsible for maintaining the population connectivity of marine benthic species mediated by larval dispersal remains a fundamental question in marine ecology and fishery management. Understanding these processes becomes particularly important in areas with a biogeographical break and primarily unidirectional water movement along the sides of the break. Based on single-nucleotide polymorphism (SNP) variability, we determine the population genetic structure, temporal genetic stability, and gene flow among populations of the commercially important crab Metacarcinus edwardsii in a system in southern Chile with a biogeographical break at 42°S. Specimens were collected from eight localities along its geographical distribution, and collection from four of these sites was performed twice. The population genomic approach, assessed with 4,209 SNPs and 234 samples, showed null population differentiation in both the geographical and temporal dimensions. No evidence of effects from the biogeographic break and the northward Humboldt current was detected in gene flow. Migration analyses showed gene flow among all sites but different proportion between pairs of sites. Overall, this research suggests that M. edwardsii comprises a single large population with high gene flow between sites separated by more than 1700 km and demonstrating temporal stability of the population genetic structure.