Sangare N. auteur aut IRD Lo-Yat A. auteur aut IRD Le Moullac G. auteur aut IRD Pecquerie Laure auteur aut IRD Thomas Yoann auteur aut IRD Lefebvre S. auteur aut IRD Le Gendre R. auteur aut IRD Beliaeff B. auteur aut IRD Andréfouët Serge auteur aut IRD text journalArticle eng text/pdf born digital access The black-lipped pearl oyster (Pinctada margaritifera) is extensively farmed in French Polynesia to produce black pearls. For a sustainable management of marine resources, studying interactions between organisms and environment, and the associated factors and processes that will impact their life cycle and thus modulate population dynamics is a major research priority. Here, we describe black-lipped pearl oyster energy acquisition and use, and its control by temperature and food concentration within the Dynamic Energy Budget (DEB) theory framework. The model parametrization was based on literature data and a specific laboratory experiment. Model validation was carried out thanks to historical in-situ datasets and a dedicated field survey. Three theoretical environmental scenarios were built to investigate the response of the pearl oyster to environmental variations. We successfully modeled a wide range of life-stage-specific traits and processes, especially the delayed acceleration of growth after settlement. Applying the model on field data collected at three different culture sites required only one free-fitted parameter, the half saturation coefficient X-k, which controls how ingestion depends on food density. X-k integrates all variations linked to the trophic environment. Analysis of the kinetics of energy fluxes under theoretical environmental scenarios suggests that temperature variations induce seasonality of reproduction in a species thought to spawn opportunistically throughout the whole year. The major influence of food concentration fluctuations on growth rate and reproductive effort is highlighted. The model showed the lower performances associated with recovery time between food-rich and starvation periods. The implications of these findings in the context of black pearl farming in a changing environment are discussed. specialized Bivalve Physiology Bioenergetics Dynamic energy budget theory Environmental change Pearl farming POLYNESIE FRANCAISE TUAMOTU ARCHIPEL AHE TAKAPOTO GAMBIER 034 040 423 art. 109006 [14 p.] 2020 0304-3800 https://www.documentation.ird.fr/hor/fdi:010078941 10.1016/j.ecolmodel.2020.109006 0304-3800 [F B010078941] https://www.documentation.ird.fr/hor/fdi:010078941 https://www.documentation.ird.fr/intranet/publi/2020/04/010078941.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2020-05-19 2025-02-24 fdi:010078941 fre