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Climate change and the performance of larval coral reef fishes: the interaction between temperature and food availability

McLeod, Ian M., Rummer, Jodie L., Clark, Timothy D., Jones, Geoffrey P., McCormick, Mark I., Wenger, Amelia S. and Munday, Philip L. 2013, Climate change and the performance of larval coral reef fishes: the interaction between temperature and food availability, Conservation physiology, vol. 1, no. 1, pp. 1-12, doi: 10.1093/conphys/cot024.

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Title Climate change and the performance of larval coral reef fishes: the interaction between temperature and food availability
Author(s) McLeod, Ian M.
Rummer, Jodie L.
Clark, Timothy D.
Jones, Geoffrey P.
McCormick, Mark I.
Wenger, Amelia S.
Munday, Philip L.
Journal name Conservation physiology
Volume number 1
Issue number 1
Article ID cot024
Start page 1
End page 12
Total pages 12
Publisher Oxford University Press
Place of publication Oxford, Eng.
Publication date 2013
ISSN 2051-1434
Keyword(s) Connectivity
developmental rate
population viability
thermal reaction norm
Summary Climate-change models predict that tropical ocean temperatures will increase by 2–3°C this century and affect plankton communities that are food for marine fish larvae. Both temperature and food supply can influence development time, growth, and metabolism of marine fishes, particularly during larval stages. However, little is known of the relative importance and potential interacting effects of ocean warming and changes to food supply on the performance of larval fishes. We tested this for larvae of the coral reef anemonefish, Amphiprion percula, in an orthogonal experiment comprising three temperatures and three feeding schedules. Temperatures were chosen to represent present-day summer averages (29.2°C) and end-of-century climate change projections of +1.5°C (30.7°C) and +3°C (32.2°C). Feeding schedules were chosen to represent a reduction in access to food (fed daily, every 2 days, or every 3 days). Overall, larvae took longer to settle at higher temperatures and with less frequent feeding, and there was a significant interaction between these factors. Time to metamorphosis was fastest in the 30.7oC and high food availability treatment (10.5 ± 0.2 days) and slowest in the 32.2oC and low food availability treatment (15.6 ± 0.5 days; i.e. 50% faster). Fish from the lower feeding regimens had a lower body condition and decreased survivorship to metamorphosis. Routine oxygen consumption rates were highest for fish raised at 32.2°C and fed every third day (162 ± 107 mg O2  kg−1 h−1) and lowest for fish raised at 29.2°C and fed daily (122 ± 101 mg O2 kg−1 h−1; i.e. 35% lower). The elevated routine oxygen consumption rate, and therefore greater energy use at higher temperatures, may leave less energy available for growth and development, resulting in the longer time to metamorphosis. Overall, these results suggest that larval fishes will be severely impacted by climate-change scenarios that predict both elevated temperatures and reduced food supply.
Language eng
DOI 10.1093/conphys/cot024
Field of Research 070403 Fisheries Management
050101 Ecological Impacts of Climate Change
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, The Author
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30105086

Document type: Journal Article
Collections: School of Life and Environmental Sciences
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.