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Cuif M., Kaplan David, Fauvelot Cécile, Lett Christophe, Vigliola Laurent. (2015). Monthly variability of self-recruitment for a coral reef damselfish. Coral Reefs, 34 (3), 759-770. ISSN 0722-4028

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Lien direct chez l'éditeur doi:10.1007/s00338-015-1300-4

Monthly variability of self-recruitment for a coral reef damselfish
Année de publication2015
Type de documentArticle référencé dans le Web of Science WOS:000359161500006
AuteursCuif M., Kaplan David, Fauvelot Cécile, Lett Christophe, Vigliola Laurent.
SourceCoral Reefs, 2015, 34 (3), p. 759-770. ISSN 0722-4028
RésuméUnderstanding the dynamics of marine populations is critical to managing marine systems effectively and requires information on patterns of population dispersal and connectivity that are still poorly known. We used transgenerational marking to study larval dispersal of the humbug damselfish, Dascyllus aruanus, in the patchy reef seascape of the southwest Lagoon of New Caledonia (SWL), southwest tropical pacific. The adult population of a patch reef located in the central part of the SWL was injected repeatedly with an enriched Ba-137 solution to ensure mass production of marked larvae over two successive reproductive seasons. Multiple cohorts of newly settled larvae were sampled, and their otolith core was analyzed by laser ablation inductively coupled plasma mass spectrometry to assess the seasonal and interannual variability of self-recruitment at the central reef. Connectivity between this reef and ten neighboring reefs was also estimated. Analysis of > 1200 settlers indicated that self-recruitment varied significantly between months (ranging from 0 to 68 %) and years (21 % in 2011 and 0 % in 2012). However, variable self-recruitment did not always correspond to variable numbers of self-recruits. Therefore, whereas self-recruitment is undoubtedly a good indication of the degree of population openness, it may not indicate local population persistence. Finally, being the first self-recruitment study to include such a large number of settlers, our study reveals that the threshold used to determine marked individuals significantly affects perceived self-recruitment and connectivity rates and, therefore, must be carefully chosen.
Plan de classementEcologie, systèmes aquatiques [036]
LocalisationFonds IRD [F B010064893]
Identifiant IRDfdi:010064893
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010064893

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