Milazzo M. auteur aut IRD Cattano C. auteur aut IRD Alonzo S. H. auteur aut IRD Foggo A. auteur aut IRD Gristina M. auteur aut IRD Rodolfo-Metalpa Riccardo auteur aut IRD Sinopoli M. auteur aut IRD Spatafora D. auteur aut IRD Stiver K. A. auteur aut IRD Hall-Spencer J. M. auteur aut IRD text journalArticle eng text/pdf born digital access Fish exhibit impaired sensory function and altered behaviour at levels of ocean acidification expected to occur owing to anthropogenic carbon dioxide emissions during this century. We provide the first evidence of the effects of ocean acidification on reproductive behaviour of fish in the wild. Satellite and sneaker male ocellated wrasse (Symphodus ocellatus) compete to fertilize eggs guarded by dominant nesting males. Key mating behaviours such as dominant male courtship and nest defence did not differ between sites with ambient versus elevated CO2 concentrations. Dominant males did, however, experience significantly lower rates of pair spawning at elevated CO2 levels. Despite the higher risk of sperm competition found at elevated CO2, we also found a trend of lower satellite and sneaker male paternity at elevated CO2. Given the importance of fish for food security and ecosystem stability, this study highlights the need for targeted research into the effects of rising CO2 levels on patterns of reproduction in wild fish. specialized pH CO2 vent alternative reproductive tactics Labrid climate change MEDITERRANEE ITALIE SICILE 032 034 283 1835 art. 20161021 [7 p.] 2016 0962-8452 https://www.documentation.ird.fr/hor/fdi:010068116 10.1098/rspb.2016.1021 0962-8452 [F B010068116] https://www.documentation.ird.fr/hor/fdi:010068116 https://www.documentation.ird.fr/intranet/publi/2016/10/010068116.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2016-11-03 2017-08-23 fdi:010068116 fre