海洋科学2025，Vol.49Issue(4)：84-94,11.DOI:10.11759/hykx20241118001
钙化藻对长棘海星幼虫附着变态的诱导特性研究
Induction of settlement and metamorphosis in crown-of-thorns starfish larvae by crustose coralline algae
摘要
Abstract
Crown-of-thorns starfish(CoTS;Acanthaster spp.)outbreaks seriously threaten coral reef ecosystems.The CoTS larvae must undergo settlement and metamorphosis to transit from the planktonic to the benthic states.This process plays a crucial role in replenishing new individuals within the population,affecting the size of the CoTS adult population.Crustose coralline algae(CCA)are pivotal functional species in coral reef ecosystems,providing suitable settlement sites for a diverse range of marine invertebrate larvae.They significantly induce set-tlement and metamorphosis in the CoTS larvae;however,the specific characteristics of their influence on the larvae remain unclear.Thus,the present study employed calcareous algae in diverse states and subjected them to varied treatments within the CoTS mid-late brachiolaria culture system.The objective was to ascertain the characteristics of the calcareous algae in inducing settlement and metamorphosis in the CoTS larvae,focusing on their survival and metamorphosis rates.The findings indicated that CCA had the highest induction effect than other attachment sub-strates,which was not influenced by the photoperiod.Second,CCA's ability to induce metamorphosis in CoTS lar-vae increased as its area enhanced,and 2 cm×2 cm of CCA could engender 100%of the larvae to attach and met-amorphose in 72 h.Moreover,this inductive capacity may be due to the action of a compound present in healthy and bleached CCA along with those for algal growth,which could be inactivated after sterilization.In addition,the metamorphosis rate of the CoTS larvae was positively correlated with their number in the culture system under a given area of CCA.The metamorphosis rate of 30-120 larvae was close to 100%,markedly greater than that of<30 larvae.This study fills the research gap on the early life stages of the benthic larvae of the CoTS in China;it also elucidates the role of calcifying algae in the life history of the CoTS,thereby providing scientific guidance for tracking the CoTS juveniles in the field.关键词
长棘海星/钙化藻/珊瑚礁生态系统/底栖幼体/附着变态Key words
The crown-of-thorns starfish/crustose coralline algae/coral reef ecosystem/benthic juvenile/settlement and met-amorphosis分类
生物学引用本文复制引用
张颖,施蔓洁,苏南,盛开,胡建兴,郑凡昱,陈偿..钙化藻对长棘海星幼虫附着变态的诱导特性研究[J].海洋科学,2025,49(4):84-94,11.基金项目
海南省三沙市海洋和渔业局项目(SSHY-2201) （SSHY-2201）
广州市科技计划项目(2024A04J4054) （2024A04J4054）
国家重点研发计划课题(2022YFD2401300) Hainan Province Sansha Ocean and Fisheries Bureau Project,No.SSHY-2201 （2022YFD2401300）
Guangzhou Science and Technology Planning Project,No.2024A04J4054 （）
National Key Research and Development Plan,No.2022YFD2401300 （）
