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    A quantitative genetic approach to assess the evolutionary potential of a coastal marine fish to ocean acidification

    228549_163002_Malvezzi_et_al-2015-Evolutionary_Applications.pdf (327.5Kb)
    Access Status
    Open access
    Authors
    Malvezzi, A.J.
    Murray, C.S.
    Feldheim, K.A.
    Di Battista, Joseph
    Garant, D.
    Gobler, C.J.
    Chapman, D.D.
    Baumann, H.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Malvezzi, A.J. and Murray, C.S. and Feldheim, K.A. and Di Battista, J. and Garant, D. and Gobler, C.J. and Chapman, D.D. et al. 2015. A quantitative genetic approach to assess the evolutionary potential of a coastal marine fish to ocean acidification. Evolutionary Applications. 8 (4): pp. 352-362.
    Source Title
    Evolutionary Applications
    DOI
    10.1111/eva.12248
    ISSN
    1752-4563
    Remarks

    This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by/4.0/

    URI
    http://hdl.handle.net/20.500.11937/42907
    Collection
    • Curtin Research Publications
    Abstract

    Assessing the potential of marine organisms to adapt genetically to increasing oceanic CO2 levels requires proxies such as heritability of fitness-related traits under ocean acidification (OA). We applied a quantitative genetic method to derive the first heritability estimate of survival under elevated CO2 conditions in a metazoan. Specifically, we reared offspring, selected from a wild coastal fish population (Atlantic silverside, Menidia menidia), at high CO2 conditions (~2300 μatm) from fertilization to 15 days posthatch, which significantly reduced survival compared to controls. Perished and surviving offspring were quantitatively sampled and genotyped along with their parents, using eight polymorphic microsatellite loci, to reconstruct a parent–offspring pedigree and estimate variance components. Genetically related individuals were phenotypically more similar (i.e., survived similarly long at elevated CO2 conditions) than unrelated individuals, which translated into a significantly nonzero heritability (0.20 ± 0.07). The contribution of maternal effects was surprisingly small (0.05 ± 0.04) and nonsignificant. Survival among replicates was positively correlated with genetic diversity, particularly with observed heterozygosity. We conclude that early life survival of M. menidia under high CO2 levels has a significant additive genetic component that could elicit an evolutionary response to OA, depending on the strength and direction of future selection.

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