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

• Main Authors: Malvezzi, Alex J., Murray, Christopher S., Feldheim, Kevin A., DiBattista, Joseph D., Garant, Dany, Gobler, Christopher J., Chapman, Demian D., Baumann, Hannes
• Language: unknown
• Published: 2015
• Subjects: Life sciences; medicine and health care; Ocean acidification
• Online Access: http://nbn-resolving.org/urn:nbn:nl:ui:13-zf-7yw4; https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:88168

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 (~2,300 μatm) from fertilization to 15 days post hatch, which significantly reduced survival compared to controls. Perished and surviving offspring were quantitatively sampled and genotyped along with their parents, using 8 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 non-zero heritability (0.20 ± 0.07). The contribution of maternal effects was surprisingly small (0.05 ± 0.04) and non-significant. 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.