Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/96564
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Type: Journal article
Title: Ocean acidification and global warming impair shark hunting behaviour and growth
Author: Pistevos, J.
Nagelkerken, I.
Rossi, T.
Olmos, M.
Connell, S.
Citation: Scientific Reports, 2015; 5(1):16293-1-16293-10
Publisher: Nature Publishing
Issue Date: 2015
ISSN: 2045-2322
2045-2322
Statement of
Responsibility: 
Jennifer C. A. Pistevos, Ivan Nagelkerken, Tullio Rossi, Maxime Olmos, Sean D. Connell
Abstract: Alterations in predation pressure can have large effects on trophically-structured systems. Modification of predator behaviour via ocean warming has been assessed by laboratory experimentation and metabolic theory. However, the influence of ocean acidification with ocean warming remains largely unexplored for mesopredators, including experimental assessments that incorporate key components of the assemblages in which animals naturally live. We employ a combination of long-term laboratory and mesocosm experiments containing natural prey and habitat to assess how warming and acidification affect the development, growth, and hunting behaviour in sharks. Although embryonic development was faster due to temperature, elevated temperature and CO2 had detrimental effects on sharks by not only increasing energetic demands, but also by decreasing metabolic efficiency and reducing their ability to locate food through olfaction. The combination of these effects led to considerable reductions in growth rates of sharks held in natural mesocosms with elevated CO2, either alone or in combination with higher temperature. Our results suggest a more complex reality for predators, where ocean acidification reduces their ability to effectively hunt and exert strong top-down control over food webs.
Keywords: Animals; Sharks; Predatory Behavior; Temperature; Seawater; Hydrogen-Ion Concentration; Oceans and Seas; Global Warming
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
RMID: 0030038615
DOI: 10.1038/srep16293
Grant ID: http://purl.org/au-research/grants/arc/FT120100183
http://purl.org/au-research/grants/arc/FT0991953
Appears in Collections:Ecology, Evolution and Landscape Science publications

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