期刊
CORAL REEFS
卷 39, 期 5, 页码 1215-1220出版社
SPRINGER
DOI: 10.1007/s00338-020-01972-0
关键词
Acid-base; Blacktip reef shark; Haematology; Climate change; Oxygen uptake rates; Physiology
资金
- Australian Research Council (ARC) [PDE150101266]
- L'Oreal-United Nations Educational, Scientific and Cultural Organisation (UNESCO) Women in Science Foundation
- Institut des Recifs Coralliens du Pacifique Fellowship
- ARC Super Science Fellowship
- James Cook University Postgraduate Research Scholarship
- Institute for Research and Development postdoctoral fellowship
- ARC Centre of Excellence for Coral Reef Studies
- Laboratoire d'Excellence CORAIL
- Station d'Ecologie Experimentale of the CRIOBE
- French Ministere de l'Environnement
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.
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