Elevated CO2 affects the behavior of an ecologically and economically important coral reef fish
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We tested the effect of near-future CO2 levels (≈490, 570, 700, and 960 μatm CO2) on the olfactory responses and activity levels of juvenile coral trout, Plectropomus leopardus, a piscivorous reef fish that is also one of the most important fisheries species on the Great Barrier Reef, Australia. Juvenile coral trout reared for 4 weeks at 570 μatm CO2 exhibited similar sensory responses and behaviors to juveniles reared at 490 μatm CO2 (control). In contrast, juveniles reared at 700 and 960 μatm CO2 exhibited dramatically altered sensory function and behaviors. At these higher CO2 concentrations, juveniles became attracted to the odor of potential predators, as has been observed in other reef fishes. They were more active, spent less time in shelter, ventured further from shelter, and were bolder than fish reared at 490 or 570 μatm CO2. These results demonstrate that behavioral impairment of coral trout is unlikely if pCO2 remains below 600 μatm; however, at higher levels, there are significant impacts on juvenile performance that are likely to affect survival and energy budgets, with consequences for predator–prey interactions and commercial fisheries.
KeywordsReef Fish Great Barrier Reef Coral Reef Fish Olfactory Response Predator Odor
We thank staff at James Cook University’s Marine Aquarium Facility and the Queensland Government’s Northern Fisheries Centre for logistical support. This research was supported by the ARC Centre of Excellence for Coral Reef Studies, the Australian Research Council and the adaptation research network for marine biodiversity and resources (NCCARF).
- Cripps IL, Munday PL, McCormick MI (2011) Ocean Acidification Affects Prey Detection by a Predatory Reef Fish. PLoS One 6 e22736. doi: 10.1371/journal.pone.0022736
- Ferrari MCO, Dixson DL, Munday PL, McCormick MI, Meekan MG, Sih A, Chivers DP (2011a) Intrageneric variation in antipredator responses of coral reef fishes affected by ocean acidification: implications for climate change projections on marine communities. Glob Chang Biol 17:2980–2986. doi: 10.1111/j.1365-2486.2011.02439.x CrossRefGoogle Scholar
- Ferrari MCO, McCormick MI, Munday PL, Meekan MG, Dixson DL, Lonnstedt O, Chivers DP (2011b) Putting prey and predator into the CO2 equation—qualitative and quantitative effects of ocean acidification on predator-prey interactions. Ecol Lett 14:1143–1148. doi: 10.1111/j.1461-0248.2011.01683.x CrossRefGoogle Scholar
- Hilmi N, Allemand D, Dupont S, Safa A, Haraldsson G, Nunes PD, Moore C, Hattam C, Reynaud S, Hall-Spencer JM, Fine M, Turley C, Jeffree R, Orr J, Munday PL, Cooley S (2012) Towards improved socio-economic assessments of ocean acidification’s impacts? Mar Biol. doi: 10.1007/s00227-012-2031-5 Google Scholar
- Mapstone BD, McKinlay JP, Davies CR (1996) A description of the commercial reef line fishery logbook data held by the Queensland Fisheries Management Authority. Report to the QFMA from the CRC Reef Research Centre and the Department of Tropical Environment Studies and Geography, James Cook University, Townsville, AustraliaGoogle Scholar
- Munday PL, McCormick MI, Meekan M, Dixson DL, Watson S-A, Ferrari MCO, Chivers D (2012) Selective mortality associated with variation in CO2 tolerance in a marine fish. Ocean Acidification (in press)Google Scholar
- Ohde S, van Woesik R (1999) Carbon dioxide flux and metabolic processes of a coral reef, Okinawa. Bull Mar Sci 65:559–576Google Scholar
- Pratchett MS, Munday PL, Graham NAJ, Kronen M, Pinca S, Friedman K, Brewer TD et al (2011) Vulnerability of coastal fisheries in the tropical Pacific to climate change. In: Bell JD, Johnson JE, Hobday AJ (eds) Vulnerability of Tropical Pacific fisheries and aquaculture to climate change. Secretariat of the Pacific Community, Noumea, pp 493–576Google Scholar
- Ruttenberg BI, Hamilton SL, Walsh SM, Donovan MK, Friedlander A, DeMartini E, Sala E, Sandin SA (2011) Predator-Induced Demographic Shifts in Coral Reef Fish Assemblages. PLoS One 6 21062. doi: e2106210.1371/journal.pone.0021062
- Wen CK, Pratchett MS, Almany GR, Jones GP (2012) Patterns of recruitment and microhabitat associations for three predatory coral reef fishes on the southern Great Barrier Reef, Australia. Coral Reefs (in press)Google Scholar