Rummer J. L. auteur aut IRD Bouyoucos I. A. auteur aut IRD Mourier Johann auteur aut IRD Nakamura N. auteur aut IRD Planes S. auteur aut IRD text journalArticle eng text/pdf born digital access Anthropogenic ocean acidification (OA) is a threat to coral reef fishes, but few studies have investigated responses of high-trophic-level predators, including sharks. We tested the effects of 72-hr exposure to OA-relevant elevated partial pressures of carbon dioxide (pCO(2)) on oxygen uptake rates, acid-base status, and haematology of newborn tropical blacktip reef sharks (Carcharhinus melanopterus). Acute exposure to end-of-centurypCO(2)levels resulted in elevated haematocrit (i.e. stress or compensation of oxygen uptake rates) and blood lactate concentrations (i.e. prolonged recovery) in the newborns. Conversely, whole blood and mean corpuscular haemoglobin concentrations, blood pH, estimates of standard and maximum metabolic rates, and aerobic scope remained unaffected. Taken together, newborn blacktip reef sharks appear physiologically robust to end-of-centurypCO(2)levels, but less so than other, previously investigated, tropical carpet sharks. Our results suggest peak fluctuatingpCO(2)levels in coral reef lagoons could still physiologically affect newborn reef sharks, but studies assessing the effects of long-term exposure and in combination with other anthropogenic stressors are needed. specialized Acid-base Blacktip reef shark Haematology Climate change Oxygen uptake rates Physiology POLYNESIE FRANCAISE MOOREA 034 021 39 5 1215-1220 2020 0722-4028 https://www.documentation.ird.fr/hor/fdi:010079140 10.1007/s00338-020-01972-0 0722-4028 [F B010079140] https://www.documentation.ird.fr/hor/fdi:010079140 https://www.documentation.ird.fr/intranet/publi/2020/07/010079140.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2020-07-31 2025-02-24 fdi:010079140 fre