Understanding connectivity of pearl oyster populations within Tuamotu atoll semi-closed lagoons: Cumulative insight from genetics and biophysical modelling approaches

Type Article
Date 2021-06
Language English
Author(s) Andréfouët Serge1, Le Gendre RomainORCID2, Thomas Yoann3, Lo-Yat Alain4, Reisser CelineORCID4, 5
Affiliation(s) 1 : UMR-9220 ENTROPIE (Institut de Recherche pour le Développement, Université de la Réunion, Ifremer, CNRS, Université de la Nouvelle-Calédonie), 101, promenade Roger-Laroque Anse Vata, BP A5, 98848 Noumea, New Caledonia
2 : IFREMER, UMR-9220 ENTROPIE, IRD, Université de la Réunion, CNRS, Université de la Nouvelle-Calédonie, Campus IRD, BP32078, Nouméa, New Caledonia
3 : Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzane, France
4 : UMR EIO, IFREMER Centre du Pacifique, Unité RMPF, BP49, Vairao, Tahiti, French Polynesia
5 : MARBEC, Univ Montpellier, CNRS, IFREMER, IRD, Montpellier, France
Source Marine Pollution Bulletin (0025-326X) (Elsevier BV), 2021-06 , Vol. 167 , P. 112324 (13p.)
DOI 10.1016/j.marpolbul.2021.112324
WOS© Times Cited 2
Keyword(s) Connectivity matrix, Population genomics, Lagoon hydrodynamics, Dispersal modelling, Pinctada margaritifera
Abstract

Connectivity affects species demography, (meta)population dynamics, evolution, phylogeny and biogeography. Various methodological approaches are applied to measure connectivity. Biophysical modelling can explore systematically the influence of atmospheric, oceanic and ecological forcing, while genetics measures connectivity patterns within the sampling strategy limit. In the Pacific Ocean pearl farming lagoons, the activity relies on spat collecting of the black lipped pearl oyster Pinctada margaritifera occurring after the larval dispersal phase, which follows spawning from wild or farmed populations. Biophysical 3D modelling and genomic studies have both separately brought insights on within-lagoon connectivity and on the origin of spats. Here, we combined previous genetics results with new realistic biophysical modelling scenarios to elucidate connectivity in Ahe Atoll lagoon. When combined, we identified the weather sequence likely explaining the realized connectivity observations. We discuss the strengths, weaknesses, opportunities and threats of combining these two approaches considering specific pearl farming demographic connectivity questions.

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Andréfouët Serge, Le Gendre Romain, Thomas Yoann, Lo-Yat Alain, Reisser Celine (2021). Understanding connectivity of pearl oyster populations within Tuamotu atoll semi-closed lagoons: Cumulative insight from genetics and biophysical modelling approaches. Marine Pollution Bulletin, 167, 112324 (13p.). Publisher's official version : https://doi.org/10.1016/j.marpolbul.2021.112324 , Open Access version : https://archimer.ifremer.fr/doc/00688/80045/