Nanodelivery of lipids to coral larvae maximises post-settlement survival: Implications for larval ecology and reef restoration
biorxiv(2023)
摘要
Interest in reef restoration is increasing as coral mortality has accelerated at an unprecedented rate. However, high mortality rates of coral early-life stages represent a population bottleneck, which directly impacts the effectiveness of restoration projects. While most coral larvae are considered lecithotrophic and catabolise maternally transmitted lipids to meet metabolic demands; here we demonstrate that coral larvae can be facultative feeders. We used nanoparticles to deliver triacylglycerides to aposymbiotic larvae which resulted in a 30% increase in larval energetic lipids, and a 46% increase in survival rate, up to 16 weeks post-settlement. Changes in phospholipid molecular species in the larvae suggest phagocytosis of the nanoparticles, and an increase in free fatty acids indicates lipolysis of the phagocytosed triacylglycerides. We suggest that a continuum of nutritional strategies should be recognised in coral early-life stages, and that nanoparticles can be used by restoration practitioners to deliver nutritional resources to maximise restoration outcomes.
### Competing Interest Statement
The authors have declared no competing interest.
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