Yellow snapper ( Lutjanus argentiventris ) connectivity in the Southern Gulf of California
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ORIGINAL PAPER
Yellow snapper (Lutjanus argentiventris) connectivity in the Southern Gulf of California Nicole Reguera-Rouzaud 1 & Noé Díaz-Viloria 1 & Laura Sánchez-Velasco 1 & Ana Laura Flores-Morales 2 & Alejandro Parés-Sierra 3 & Octavio Aburto-Oropeza 4 & Adrián Munguía-Vega 5,6 Received: 30 November 2018 / Revised: 31 January 2020 / Accepted: 15 April 2020 # Senckenberg Gesellschaft für Naturforschung 2020
Abstract We analysed the genetic connectivity and larval transport routes of Lutjanus argentiventris to test if eddies could transport coastal-demersal fish larvae between the peninsular and mainland coasts of the Southern Gulf of California. Larval transport was estimated using the ROMS oceanographic model during the main spawning period (July–August). We used 12 microsatellite loci to assess genetic diversity, population structure and gene flow estimates in 233 L. argentiventris samples from nine sites. The oceanographic model suggested the existence of a stream flow and eddies that maintain connectivity in the Southern Gulf of California. The global AMOVA and paired FST showed no significant genetic differentiation among the sites, and the estimations of the number of migrants indicated moderate to high gene flow among locations. However, after testing five demographic scenarios of connectivity with a coalescent sampler, our results supported the presence of a metapopulation structure with sourcesink dynamics. We discuss the challenges to reconcile our results considering the assumptions of the different analyses and the characteristics of marine metapopulations. Connectivity of L. argentiventris could be representative of other costal-demersal species with a similar life history and spawning season. Keywords Microsatellite . Oceanographic model . Larval dispersal . Gene flow
Introduction Communicated by R. Thiel Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12526-020-01070-y) contains supplementary material, which is available to authorized users. * Noé Díaz-Viloria [email protected] 1
Departamento de Plancton y Ecología Marina, Instituto Politécnico Nacional–Centro Interdisciplinario de Ciencias Marinas (IPN-CICIMAR), La Paz, Mexico
2
Departamento de Oceanografía Física, Facultad de Ciencias Marinas, Universidad Autónoma de Baja California, Ensenada, Mexico
3
Departamento de Oceanografía Física, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico
4
Marine Biology Research Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, USA
5
Conservation Genetics Laboratory, School of Natural Resources and the Environment, University of Arizona, Tucson, AZ, USA
6
Lab Applied Genetics Research, La Paz, Baja California Sur, Mexico
One of the strongest drivers of genetic structure within a species is connectivity, the demographic linking of local populations via larval dispersal or movement of juveniles or adults. For instance, connectivity influences almost all ecological
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