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Publication . Article . Other literature type . 2013

Role of evolutionary and ecological factors in the reproductive success and the spatial genetic structure of the temperate gorgonian Paramuricea clavata

Kenza Mokhtar-Jamaï; Rafel Coma; Jinliang Wang; Frederic Zuberer; Jean-Pierre Féral; Didier Aurelle;
Open Access
English
Published: 01 May 2013 Journal: Ecology and Evolution, volume 3, issue 6, pages 1,765-1,779 (issn: 2045-7758, eissn: 2045-7758, Copyright policy )
Publisher: Blackwell Publishing Ltd
Abstract
Dispersal and mating features strongly influence the evolutionary dynamics and the spatial genetic structure (SGS) of marine populations. For the first time in a marine invertebrate, we examined individual reproductive success, by conducting larval paternity assignments after a natural spawning event, combined with a small-scale SGS analysis within a population of the gorgonian Paramuricea clavata. Thirty four percent of the larvae were sired by male colonies surrounding the brooding female colonies, revealing that the bulk of the mating was accomplished by males from outside the studied area. Male success increased with male height and decreased with increasing male to female distance. The parentage analyses, with a strong level of self-recruitment (25%), unveiled the occurrence of a complex family structure at a small spatial scale, consistent with the limited larval dispersal of this species. However, no evidence of small scale SGS was revealed despite this family structure. Furthermore, temporal genetic structure was not observed, which appears to be related to the rather large effective population size. The low level of inbreeding found suggests a pattern of random mating in this species, which disagrees with expectations that limited larval dispersal should lead to biparental inbreeding. Surface brooding and investment in sexual reproduction in P. clavata contribute to multiple paternity (on average 6.4 fathers were assigned per brood), which enhance genetic diversity of the brood. Several factors may have contributed to the lack of biparental inbreeding in our study such as (i) the lack of sperm limitation at a small scale, (ii) multiple paternity, and (iii) the large effective population size. Thus, our results indicate that limited larval dispersal and complex family structure do not necessarily lead to biparental inbreeding and SGS. In the framework of conservation purposes, our results suggested that colony size, proximity among colonies and the population size should be taken into consideration for restoration projects.
This research was partly supported by the MCI project CGL2010-18466 and CoCoNet (FP7 Grant Agreement: 287844). R. C. is part of the Marine-Biogeochemistry and Global-Change-Research group from Generalitat de Catalunya.
15 páginas, 4 figuras, 4 tablas.
Peer reviewed
Subjects by Vocabulary

Medical Subject Headings: fungi

Microsoft Academic Graph classification: Effective population size Paramuricea clavata ved/biology.organism_classification_rank.species ved/biology Inbreeding Mating system Biology Biological dispersal Reproductive success Ecology Population education.field_of_study education Population size

Subjects

Original Research, Gamete and larval dispersal, mating system, microsatellites, natural spawning event, parentage analyses, Gamete and larval dispersal, mating system, microsatellites, natural spawning event, parentage analyses, [ SDE.BE ] Environmental Sciences/Biodiversity and Ecology, Nature and Landscape Conservation, Ecology, Ecology, Evolution, Behavior and Systematics, [SDE.BE]Environmental Sciences/Biodiversity and Ecology

Funded by
EC| COCONET
Project
COCONET
Towards COast to COast NETworks of marine protected areas ( from the shore to the high and deep sea), coupled with sea-based wind energy potential.
  • Funder: European Commission (EC)
  • Project Code: 287844
  • Funding stream: FP7 | SP1 | KBBE
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