Fertilisation and larval development in an Antarctic bivalve
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TitleFertilisation and larval development in an Antarctic bivalve, Laternula elliptica, under reduced pH and elevated temperaturesAbstractElevated temperatures associated with ocean warming and acidification can influence development and, ultimately, success of larval molluscs. The effect of projected oceanic changes on fertilisation and larval development in an Antarctic bivalve, Laternula elliptica, was investigated through successive larval stages at ambient temperature and pH conditions (-1.6 deg C and pH 7.98) and conditions representative of projections through to 2100 (-0.5 deg C to +0.4 deg C and pH 7.80 to pH 7.65). Where significant effects were detected, increased temperature had a consistently positive influence on larval development, regardless of pH level, while effects of reduced pH varied with larval stage and incubation temperature. Fertilisation was high and largely independent of stressors, with no loss of gamete viability. Mortality was unaffected at all development stages under experimental conditions. Elevated temperatures reduced occurrences of abnormalities in D-larvae and accelerated larval development through late veliger and D-larval stages, with D-larvae occurring 5 d sooner at 0.4 deg C compared to ambient temperature. Reduced pH did not affect occurrences of abnormalities in larvae, but it slowed the development of calcifying stages. More work is required to investigate the effects of developmental delays of the magnitude seen here in order to better determine the ecological relevance of these changes on longer term larval and juvenile success. Copyright 2015 Inter-Research.AcknowledgementsWe thank Rob Robbins and the USA dive team at McMurdo Station for L. elliptica collection and Antarctica New Zealand for their logistical support. We thank Neill Barr and Graeme Moss (NIWA) for their continual support during set-up and maintenance of the experiment, Kim Currie and Judith Murdoch (NIWA/University of Otago Research Centre for Oceanography) for water chemistry analysis, Stefanie Menashe and Sonja Hempel (Victoria University of Wellington, VUW) for their valuable assistance in the lab, and Dalice Sim and Lisa Woods (VUW School of Mathematics, Statistics and Operations Research) for her assistance and advice. This research was funded by a VUW Grant 100241, a Victoria Doctoral Scholarship Fund, the Royal Society of New Zealand Marsden Fund NIW1101, and NIWA. Three anonymous reviewers and the editor are thanked for their comments and suggestions, substantially improving the manuscript.
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1st AuthorBylenga, C.AuthorBylenga, C.Cummings, V.Ryan, K.Year2015JournalMarine Ecology Progress SeriesVolume536Pages187-201DOI10.3354/meps11436URLhttps://www.scopus.com/inward/recor.....73140d51a74d23be49815e616KeywordsBivalviaInvertebrataLaternula ellipticaMollusca, rank5Author KeywordsAbnormal developmentAntarcticaClimate changeCO2D-larvaeEarly life historyFertilisationInvertebrateOcean acidification
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TypeArticleCitationBylenga, C., Cummings, V. and Ryan, K. (2015). Fertilisation and larval development in an Antarctic bivalve, Laternula elliptica, under reduced pH and elevated temperatures. Marine Ecology Progress Series, 536: 187-201 IdentifierBylenga2015187Relevancerank5
Ryan, K., Fertilisation and larval development in an Antarctic bivalve , [Bylenga2015187]. Antarctica NZ, accessed 17/05/2025, https://adam.antarcticanz.govt.nz/nodes/view/63412, 10.3354/meps11436