Rugila, Allison2021-01-192021-01-192019http://hdl.handle.net/1773/46668With continued climate change, coastal regimes in dissolved oxygen are expected to become more variable and severe. Larval marine invertebrates, particularly calcifiers like bivalves, have been identified as being sensitive to changing conditions. This study focuses on the effect of low dissolved oxygen (DO) and food stress on larval growth, lipid content, and survivorship following 6-day exposure to treatment conditions from 2 to 8 days post-fertilization. Using selected crosses between four maternal and 1 paternal lines, this study determined the effect of maternal background on larval response variables. Overall, reduced food and oxygen negatively affected growth but had no effect on lipid contents. Cohorts from different maternal lines responded differently within a DO x Food treatment combination, and highest performance did not always occur in the high DO x high food treatment. Counter intuitive differences in growth rates suggest plasticity in maternal investment or possible genetic by environment interactions. High variance in lipid content estimates existed within and among treatment combinations, and may require per larva measurements to account for inter-individual variation extrinsic to treatment level effects. Survivorship was >80% overall and did not significantly differ for any maternal lines or treatment combinations. In this experiment, parental background explained 46% of the variance in larval growth, but only 2% of variance in lipid content. This suggests that larval M. trossulus are highly plastic in their energy budgeting during periods of stress, but alternative metrics to assess differences in lipids are needed.Mytilus trossulusdissolved oxygen stresslipid content