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No effect of elevated carbon dioxide on reproductive behaviors in the three-spined stickleback
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology. Department of Biological and Environmental Sciences, University of Gothenburg.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Physiology.
Sven Lovén Centre for Marine Infrastructure, University of Gothenburg; Gothenburg Global Biodiversity Centre.
Department of Biological and Environmental Sciences, University of Gothenburg; Department of Biology, Norwegian University of Science and Technology.
2017 (English)In: Behavioral Ecology, ISSN 1045-2249, E-ISSN 1465-7279Article in journal (Refereed) Published
Abstract [en]

Ocean acidification, the reduction in ocean pH resulting from anthropogenic emissions of carbon dioxide (CO2), has been predicted to alter the behavior of fishes. During experimental exposure to CO2 concentrations projected for the year 2100 (~1000 μatm), fish have been reported to display disturbances in activity, learning, behavioral lateralization, and even attraction to predator cues. Reproductive behaviors have received far less attention, despite an intensive research effort on ocean acidification and its ecological importance. Here, we investigate whether elevated levels of CO2 affect reproduction in breeding pairs of the three-spined stickleback, Gasterosteus aculeatus, a model species in behavioral, evolutionary ecology, and environmental toxicology. We found that males under both present day levels (400 μatm) and future levels (1000 μatm) of CO2 developed normal sexual ornaments, pursued normal nest building activi-ties, exhibited similar levels of courtship behaviors and displacement fanning, and had the same mating probability. Moreover, fanning behavior during the paternal care period followed what is expected for the species for males from both treatments, and there was no effect of treatment on the numbers of offspring produced. This study is the first to investigate the effect of elevated CO2 on the com-plete breeding cycle in detail, studying an array of highly fitness-relevant traits. Our study showing surprising resilience of fish repro-duction is an important contribution in order to realistically predict the impacts of future ocean acidification.

Place, publisher, year, edition, pages
Oxford University Press, 2017.
National Category
Behavioral Sciences Biology
Identifiers
URN: urn:nbn:se:uu:diva-331063DOI: 10.1093/beheco/arx112OAI: oai:DiVA.org:uu-331063DiVA: diva2:1148208
Funder
Swedish Research Council Formas, 2013–947Swedish Research Council Formas, 2009–596Swedish Research Council, 621-2012-4679The Royal Swedish Academy of Sciences, (FOA14SLC027The Royal Swedish Academy of Sciences, FOA14SLC016
Available from: 2017-10-10 Created: 2017-10-10 Last updated: 2017-10-19Bibliographically approved

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