FN Archimer Export Format PT J TI Near-future ocean warming and acidification alter foraging behaviour, locomotion, and metabolic rate in a keystone marine mollusc BT AF Horwitz, Rael Norin, Tommy Watson, Sue-Ann Pistevos, Jennifer C. A. Beldade, Ricardo Hacquart, Simon Gattuso, Jean-Pierre Rodolfo-Metalpa, Riccardo Vidal-Dupiol, Jeremie Killen, Shaun S. Mills, Suzanne C. AS 1:1;2:2;3:3;4:1;5:1,4;6:1;7:5,6;8:7;9:8,9;10:2;11:1; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:PDG-RBE-IHPE;10:;11:; C1 PSL Université Paris: EPHE-UPVD-CNRS, USR 3278 CRIOBE, BP 1013, 98729, Papetoai, Moorea, French Polynesia University of Glasgow, Institute of Biodiversity, Animal Health and Comparative Medicine, Graham Kerr Building, Glasgow, G12 8QQ, United Kingdom Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland, 4811, Australia Pontificia Universidad Católica de Chile, Departamento de Ecología, Facultad de Ciencias Biológicas, Santiago, Chile Sorbonne Université, CNRS, Laboratoire d’Océanographie de Villefranche, 181 chemin du Lazaret, F-06230, Villefranche-sur-mer, France Institute for Sustainable Development and International Relations, Sciences Po, 27 rue Saint Guillaume, F-75007, Paris, France ENTROPIE IRD - Université de La Réunion - CNRS, Nouméa, 98848, Nouvelle-Calédonie, France IFREMER, UMR 241 EIO, BP 7004, 98719, Taravao, Tahiti, French Polynesia IHPE, Université Montpellier, CNRS, IFREMER, Université Perpignan Via Domitia, F-34095, Montpellier, France C2 EPHE, FRANCE UNIV GLASGOW, UK UNIV JAMES COOK, AUSTRALIA UNIV PONTIFICIA CATOLICA CHILE, CHILE UNIV SORBONNE, FRANCE IDDRI, FRANCE IRD, FRANCE IFREMER, FRANCE IFREMER, FRANCE SI MONTPELLIER SE PDG-RBE-IHPE UM IHPE EIO ENTROPIE IN WOS Ifremer UMR WOS Cotutelle UMR DOAJ copubli-france copubli-p187 copubli-europe copubli-univ-france copubli-int-hors-europe IF 4.379 TC 15 UR https://archimer.ifremer.fr/doc/00618/72974/72049.pdf https://archimer.ifremer.fr/doc/00618/72974/72050.pdf LA English DT Article AB Environmentally-induced changes in fitness are mediated by direct effects on physiology and behaviour, which are tightly linked. We investigated how predicted ocean warming (OW) and acidification (OA) affect key ecological behaviours (locomotion speed and foraging success) and metabolic rate of a keystone marine mollusc, the sea hare Stylocheilus striatus, a specialist grazer of the toxic cyanobacterium Lyngbya majuscula. We acclimated sea hares to OW and/or OA across three developmental stages (metamorphic, juvenile, and adult) or as adults only, and compare these to sea hares maintained under current-day conditions. Generally, locomotion speed and time to locate food were reduced ~1.5- to 2-fold when the stressors (OW or OA) were experienced in isolation, but reduced ~3-fold when combined. Decision-making was also severely altered, with correct foraging choice nearly 40% lower under combined stressors. Metabolic rate appeared to acclimate to the stressors in isolation, but was significantly elevated under combined stressors. Overall, sea hares that developed under OW and/or OA exhibited a less severe impact, indicating beneficial phenotypic plasticity. Reduced foraging success coupled with increased metabolic demands may impact fitness in this species and highlight potentially large ecological consequences under unabated OW and OA, namely in regulating toxic cyanobacteria blooms on coral reefs. PY 2020 PD MAR SO Scientific Reports SN 2045-2322 PU Springer Science and Business Media LLC VL 10 IS 1 UT 000560016100002 DI 10.1038/s41598-020-62304-4 ID 72974 ER EF