Connectivity dominates larval replenishment in a coastal reef fish metapopulation
Identifieur interne : 001966 ( Pmc/Curation ); précédent : 001965; suivant : 001967Connectivity dominates larval replenishment in a coastal reef fish metapopulation
Auteurs : Pablo Saenz-Agudelo [France, Australie] ; Geoffrey P. Jones [Australie] ; Simon R. Thorrold [États-Unis] ; Serge Planes [France]Source :
- Proceedings of the Royal Society B: Biological Sciences [ 0962-8452 ] ; 2011.
Abstract
Direct estimates of larval retention and connectivity are essential to understand the structure and dynamics of marine metapopulations, and optimize the size and spacing of reserves within networks of marine-protected areas (MPAs). For coral reef fishes, while there are some empirical estimates of self-recruitment at isolated populations, exchange among sub-populations has been rarely quantified. Here, we used microsatellite DNA markers and a likelihood-based parentage analysis to assess the relative magnitude of self-recruitment and exchange among eight geographically distinct sub-populations of the panda clownfish
Url:
DOI: 10.1098/rspb.2010.2780
PubMed: 21325328
PubMed Central: 3151711
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<front><div type="abstract" xml:lang="en"><p>Direct estimates of larval retention and connectivity are essential to understand the structure and dynamics of marine metapopulations, and optimize the size and spacing of reserves within networks of marine-protected areas (MPAs). For coral reef fishes, while there are some empirical estimates of self-recruitment at isolated populations, exchange among sub-populations has been rarely quantified. Here, we used microsatellite DNA markers and a likelihood-based parentage analysis to assess the relative magnitude of self-recruitment and exchange among eight geographically distinct sub-populations of the panda clownfish <italic>Amphiprion polymnus</italic>
along 30 km of coastline near Port Moresby, Papua New Guinea. In addition, we used an assignment/exclusion test to identify immigrants arriving from genetically distinct sources. Overall, 82 per cent of the juveniles were immigrants while 18 per cent were progeny of parents genotyped in our focal metapopulation. Of the immigrants, only 6 per cent were likely to be genetically distinct from the focal metapopulation, suggesting most of the connectivity is among sub-populations from a rather homogeneous genetic pool. Of the 18 per cent that were progeny of known adults, two-thirds dispersed among the eight sub-populations and only one-third settled back into natal sub-populations. Comparison of our data with previous studies suggested that variation in dispersal distances is likely to be influenced by the geographical setting and spacing of sub-populations.</p>
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,<country>USA</country>
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<author-notes><corresp id="cor1"><label>*</label>
Author for correspondence (<email>pablo.saenz@univ-perp.fr</email>
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).
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<abstract><p>Direct estimates of larval retention and connectivity are essential to understand the structure and dynamics of marine metapopulations, and optimize the size and spacing of reserves within networks of marine-protected areas (MPAs). For coral reef fishes, while there are some empirical estimates of self-recruitment at isolated populations, exchange among sub-populations has been rarely quantified. Here, we used microsatellite DNA markers and a likelihood-based parentage analysis to assess the relative magnitude of self-recruitment and exchange among eight geographically distinct sub-populations of the panda clownfish <italic>Amphiprion polymnus</italic>
along 30 km of coastline near Port Moresby, Papua New Guinea. In addition, we used an assignment/exclusion test to identify immigrants arriving from genetically distinct sources. Overall, 82 per cent of the juveniles were immigrants while 18 per cent were progeny of parents genotyped in our focal metapopulation. Of the immigrants, only 6 per cent were likely to be genetically distinct from the focal metapopulation, suggesting most of the connectivity is among sub-populations from a rather homogeneous genetic pool. Of the 18 per cent that were progeny of known adults, two-thirds dispersed among the eight sub-populations and only one-third settled back into natal sub-populations. Comparison of our data with previous studies suggested that variation in dispersal distances is likely to be influenced by the geographical setting and spacing of sub-populations.</p>
</abstract>
<kwd-group><kwd>parentage analysis</kwd>
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<kwd>dispersal</kwd>
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<kwd>self-recruitment</kwd>
<kwd>marine protected area</kwd>
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