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

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.

Keyword(s)

Connectivity matrix, Population genomics, Lagoon hydrodynamics, Dispersal modelling, Pinctada margaritifera

Full Text

FilePagesSizeAccess
Publisher's official version
137 Mo
Author's final draft
341 Mo
How to cite
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.). https://doi.org/10.1016/j.marpolbul.2021.112324, https://archimer.ifremer.fr/doc/00688/80045/

Copy this text