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Larval energetics of the Sydney rock oyster Saccostrea glomerata and Pacific oyster Magallana gigas
Citation
Gibbs, M and Scanes, E and Parker, L and Byrne, M and O'Connor, W and Virtue, P and Ross, P, Larval energetics of the Sydney rock oyster Saccostrea glomerata and Pacific oyster Magallana gigas, Marine Ecology - Progress Series, 656 pp. 51-64. ISSN 0171-8630 (2020) [Refereed Article]
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Abstract
Larvae are a critical dispersal stage of marine invertebrates, and their survival depends on nutrition and energetics. This study compared the size, survival, metabolic rate and egg and larval lipid class profiles of larvae of the endemic Sydney rock oyster Saccostrea glomerata and the invasive Pacific oyster Magallana gigas through a period of starvation for 5 and 9 d after fertilisation. Starved larvae grew without food until 5 d of age, at which point they stopped developing, but resumed growth when fed. Egg lipids profiles comprised 78.1 and 74.5% triacylglycerol for M. gigas and S. glomerata respectively. When fed, larvae of M. gigas were significantly larger in size and had faster growth and similar survival compared to S. glomerata. When starved, larvae of M. gigas and S. glomerata grew at similar rates, and there was a trend for lower survival of M. gigas. Larval endogenous lipid reserves were deleted in the first 24 h. Larvae of M. gigas had more total lipids and comparatively more diacylglycerols, monoacylglycerols, phospholipids and cholesterol, whereas S. glomerata had more diacylglycerols and produced sterol esters. Starvation altered the patterns of lipid assimilation, and metabolic rates of larvae of M. gigas and S. glomerata differed over time. When starved, S. glomerata larvae had greater capacity to cope with starvation compared to M. gigas, perhaps due to an evolutionary history in oligotrophic estuaries. As the climate rapidly changes in this global climate-change hotspot, S. glomerata is likely to be negatively affected.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | oyster, energetics, larvae, lipids, ocean warming and acidification, climate change, lipids, larval energetics |
| Research Division: | Agricultural, Veterinary and Food Sciences |
| Research Group: | Agricultural biotechnology |
| Research Field: | Agricultural biotechnology not elsewhere classified |
| Objective Division: | Animal Production and Animal Primary Products |
| Objective Group: | Fisheries - wild caught |
| Objective Field: | Fisheries - wild caught not elsewhere classified |
| UTAS Author: | Virtue, P (Associate Professor Patti Virtue) |
| ID Code: | 142087 |
| Year Published: | 2020 |
| Deposited By: | Ecology and Biodiversity |
| Deposited On: | 2020-12-11 |
| Last Modified: | 2021-02-23 |
| Downloads: | 0 |
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