Energetic lipid responses of larval oysters to ocean acidification

Mitchell C Gibbs; Laura M Parker; Elliot Scanes; Maria Byrne; Wayne A O'Connor; Pauline M Ross

doi:10.1016/j.marpolbul.2021.112441

Energetic lipid responses of larval oysters to ocean acidification

Mar Pollut Bull. 2021 Jul:168:112441. doi: 10.1016/j.marpolbul.2021.112441. Epub 2021 May 12.

Authors

Mitchell C Gibbs¹, Laura M Parker², Elliot Scanes¹, Maria Byrne¹, Wayne A O'Connor³, Pauline M Ross⁴

Affiliations

¹ The University of Sydney, School of Life and Environmental Sciences, Camperdown, New South Wales 2006, Australia; The Sydney Institute of Marine Science, Mosman, New South Wales 2088, Australia.
² The University of Sydney, School of Life and Environmental Sciences, Camperdown, New South Wales 2006, Australia; The University of New South Wales, School of Biological, Earth and Environmental Sciences, Kensington, New South Wales 2052, Australia.
³ New South Wales Department of Primary Industries, Port Stephens Fisheries Institute, Taylors Beach, New South Wales 2316, Australia.
⁴ The University of Sydney, School of Life and Environmental Sciences, Camperdown, New South Wales 2006, Australia; The Sydney Institute of Marine Science, Mosman, New South Wales 2088, Australia. Electronic address: pauline.ross@sydney.edu.au.

PMID: 33991985
DOI: 10.1016/j.marpolbul.2021.112441

Abstract

Climate change will increase energetic demands on marine invertebrate larvae and make planktonic food more unpredictable. This study determined the impact of ocean acidification on larval energetics of the oysters Saccostrea glomerata and Crassostrea gigas. Larvae of both oysters were reared until the 9-day-old, umbonate stage under orthogonal combinations of ambient and elevated p CO ₂ (340 and 856 μatm) and food was limited. Elevated p CO ₂ reduced the survival, size and larval energetics, larvae of C. gigas being more resilient than S. glomerata. When larvae were fed, elevated p CO ₂ reduced lipid levels across all lipid classes. When larvae were unfed elevated p CO ₂ resulted in increased lipid levels and mortality. Ocean acidification and food will interact to limit larval energetics. Larvae of S. glomerata will be more impacted than C. gigas and this is of concern given their aquacultural status and ecological function.

Keywords: Aquaculture; Climate change; Larvae; Lipids; Ocean acidification; Oysters.

MeSH terms

Animals
Carbon Dioxide / analysis
Crassostrea*
Hydrogen-Ion Concentration
Larva
Lipids
Oceans and Seas
Seawater*

Substances

Lipids
Carbon Dioxide