@article{fdi:010078649, title = {{N}ear-future ocean warming and acidification alter foraging behaviour, locomotion, and metabolic rate in a keystone marine mollusc}, author = {{H}orwitz, {R}. and {N}orin, {T}. and {W}atson, {S}.-{A}. and {P}istevos, {J}.{C}.{A}. and {B}eldade, {R}. and {H}acquart, {S}. and {G}attuso, {J}.{P}. and {R}odolfo-{M}etalpa, {R}iccardo and {V}idal-{D}upiol, {J}. and {K}illen, {S}.{S}. and {M}ills, {S}.{C}.}, editor = {}, language = {{ENG}}, abstract = {{E}nvironmentally-induced changes in fitness are mediated by direct effects on physiology and behaviour, which are tightly linked. {W}e 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 {S}tylocheilus striatus, a specialist grazer of the toxic cyanobacterium {L}yngbya majuscula. {W}e 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. {G}enerally, 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. {D}ecision-making was also severely altered, with correct foraging choice nearly 40% lower under combined stressors. {M}etabolic rate appeared to acclimate to the stressors in isolation, but was significantly elevated under combined stressors. {O}verall, sea hares that developed under {OW} and/or {OA} exhibited a less severe impact, indicating beneficial phenotypic plasticity. {R}educed 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.}, keywords = {{RECIF} {CORALLIEN} ; {FACTEUR} {CLIMATIQUE} ; {INVERTEBRE} {AQUATIQUE} ; {BIOLOGIE} ; {METABOLISME} ; {ETHOLOGIE} ; {ACIDIFICATION} ; {RECHAUFFEMENT} {CLIMATIQUE} ; {IMPACT} {SUR} {L}'{ENVIRONNEMENT} ; {LIEVRE} {DE} {MER} ; {CYANOBACTERIE} {TOXIQUE}}, booktitle = {}, journal = {{S}cientific reports}, volume = {10}, numero = {1}, pages = {art. no 5461 [11 ]}, ISSN = {2045-2322}, year = {2020}, DOI = {10.1038/s41598-020-62304-4}, URL = {https://www.documentation.ird.fr/hor/fdi:010078649}, }