FN Archimer Export Format PT J TI Pinctada margaritifera responses to temperature and pH: Acclimation capabilities and physiological limits BT AF LE MOULLAC, Gilles SOYEZ, Claude LATCHERE, Oihana VIDAL-DUPIOL, Jeremie FREMERY, Juliette SAULNIER, Denis LO YAT, Alain BELLIARD, Corinne MAZOUNI-GAERTNER, Nabila GUEGUEN, Yannick AS 1:1;2:1;3:1;4:1;5:1;6:1;7:1;8:1;9:2;10:1,3; FF 1:PDG-RBE-RMPF;2:PDG-RBE-RMPF;3:PDG-RBE-RMPF;4:PDG-RBE-RMPF;5:PDG-RBE-RMPF;6:PDG-RBE-RMPF;7:PDG-RBE-RMPF;8:PDG-RBE-RMPF;9:;10:PDG-RBE-IHPE; C1 IFREMER, UMR EIO 241, LabexCorail, BP 7004, Taravao 98719, Tahiti, Fr Polynesia. Univ Polynesie Francaise, UMR EIO 241, Campus Outumaoro,BP 6570, Faaa 98702, Fr Polynesia. Univ Montpellier, CNRS, UPVD, Ifremer,UMR IHPE 5244, CC 80, F-34095 Montpellier, France. C2 IFREMER, FRANCE UNIV POLYNESIE FRANCAISE, FRANCE IFREMER, FRANCE SI TAHITI MONTPELLIER SE PDG-RBE-RMPF PDG-RBE-IHPE UM IHPE EIO IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 2.176 TC 28 UR https://archimer.ifremer.fr/doc/00332/44364/43969.pdf LA English DT Article DE ;Global change;Pearl oyster;Bioenergetic;Biomineralization;Pacific ocean;French Polynesia AB The pearl culture is one of the most lucrative aquacultures worldwide. In many South Pacific areas, it depends on the exploitation of the pearl oyster Pinctada margaritifera and relies entirely on the environmental conditions encountered in the lagoon. In this context, assessing the impact of climatic stressors, such as global warming and ocean acidification, on the functionality of the resource in terms of renewal and exploitation is fundamental. In this study, we experimentally addressed the impact of temperature (22, 26, 30 and 34 °C) and partial pressure of carbon dioxide pCO2 (294, 763 and 2485 μatm) on the biomineralization and metabolic capabilities of pearl oysters. While the energy metabolism was strongly dependent on temperature, results showed its independence from pCO2 levels; no interaction between temperature and pCO2 was revealed. The energy metabolism, ingestion, oxygen consumption and, hence, the scope for growth (SFG) were maximised at 30 °C and dramatically fell at 34 °C. Biomineralization was examined through the expression measurement of nine mantle's genes coding for shell matrix proteins involved in the formation of calcitic prisms and/or nacreous shell structures; significant changes were recorded for four of the nine (Pmarg-Nacrein A1, Pmarg-MRNP34, Pmarg-Prismalin 14 and Pmarg-Aspein). These changes showed that the maximum and minimum expression of these genes was at 26 and 34 °C, respectively. Surprisingly, the modelled thermal optimum for biomineralization (ranging between 21.5 and 26.5 °C) and somatic growth and reproduction (28.7 °C) appeared to be significantly different. Finally, the responses to high temperatures were contextualised with the Intergovernmental Panel on Climate Change (IPCC) projections, which highlighted that pearl oyster stocks and cultures would be severely threatened in the next decade. PY 2016 PD DEC SO Estuarine Coastal And Shelf Science SN 0272-7714 PU Academic Press Ltd- Elsevier Science Ltd VL 182 IS Part.B UT 000390728100006 BP 261 EP 269 DI 10.1016/j.ecss.2016.04.011 ID 44364 ER EF