Abstract


ASSESSING CONNECTIVITY IN MIGRATORY AND SEDENTARY MARINE ORGANISMS THROUGH POPULATION STRUCTURE INFERRED FROM GENOME-WIDE MARKERS

Atlantic mackerel (Scomber scombrus L.) and Altantic Bluefin tuna (Thunnus thynnus thynnus) are widely distributed fish that perform extensive migrations between spawning and feeding grounds. In contrast, the purple sea urchin (Paracentrotus lividus) is a sedentary benthic invertebrate that relies on its pelagic larval stage for dispersion. Due to a hypothetical homing behavior of mackerel and Bluefin tuna, determining subpopulations within these species and assessing connectivity among them requires the study of genetic structure at different life stages, whereas, in the purple sea urchin, the genetic structure of the adults should be an indicator of the connectivity potential through larval dispersion. We have analyzed thousands of Single Nucleotide Polymorphisms (SNPs) discovered and genotyped through restriction site associated DNA sequencing (RAD-seq) in order to study genetic population structure on larvae, juveniles and adults of Atlantic mackerel and Atlantic Bluefin tuna, and on adults of purple sea urchin. Our results prove RAD-seq as a powerful approach to discover markers suitable for detecting population structure, and to shed light into the subpopulation connectivity, larval dispersal potential and migratory behaviors of the species under study.

Authors

Rodriguez-Ezpeleta, N., AZTI-Tecnalia, Spain, nrodriguez@azti.es

Álvarez, P., AZTI-Tecnalia, Spain, palvarez@azti.es

Arrizabalaga, H., AZTI-Tecnalia, Spain, harri@azti.es

Bald, J., AZTI-Tecnalia, Spain, jbald@azti.es

Irigoien, X., KAUST, Saudi Arabia, Xabier.Irigoyen@kaust.edu.sa

Details

Oral presentation

Session #:007
Date: 2/25/2015
Time: 11:00
Location: Albeniz (Floor -2)

Presentation is given by student: No