2 research outputs found
Kinship analyses identify fish dispersal events on a temperate coastline
7 páginas, 3 figuras.Connectivity is crucial for the persistence and resilience of marine species,
the establishment of networks of marine protected areas and the delineation
of fishery management units. In the marine environment, understanding
connectivity is still a major challenge, due to the technical difficulties of
tracking larvae. Recently, parentage analysis has provided a means to
address this question effectively. To be effective, this method requires limited
adult movement and extensive sampling of parents, which is often
not possible for marine species. An alternative approach that is less sensitive
to constraints in parental movement and sampling could be the reconstruction
of sibships. Here, we directly measure connectivity and larval dispersal
in a temperate marine ecosystem through both analytical approaches. We
use data from 178 single nucleotide polymorphism markers to perform
parentage and sibship reconstruction of the black-faced blenny (Tripterygion
delaisi) from an open coastline in the Mediterranean Sea. Parentage analysis
revealed a decrease in dispersal success in the focal area over 1 km distance
and approximately 6.5% of the juveniles were identified as self-recruits.
Sibship reconstruction analysis found that, in general, full siblings did not
recruit together to the same location, and that the largest distance between
recruitment locations was much higher (11.5 km) than found for parent–
offspring pairs (1.2 km). Direct measurements of dispersal are essential to
understanding connectivity patterns in different marine habitats, and show
the degree of self-replenishment and sustainability of populations of marine
organisms.We demonstrate that sibship reconstruction allows direct measurements
of dispersal and family structure in marine species while being more
easily applied in those species for which the collection of the parental
population is difficult or unfeasible.This work was partially funded by the Spanish
Ministry of Science and Innovation through the BENTHOMICS
(CTM2010-22218-C02-01-02) projects and the FBBVA project
(BIOCON 08-187?09). The authors C.S., M.P. and E.M. are part of
the research group 2009SGR-636 and 2009SGR-665 of the Generalitat
de Catalunya, and C.S. was funded by a JAE-Predoctoral Fellowship.Peer reviewe