深圳宋卡湖根管虫(多毛纲:龙介虫科)个体发育的初步观察

对分布于中国深圳的宋卡湖根管虫Ficopomatus talehsapensis Pillai,2008进行了实验观察.结果表明:1)雌雄异体,精子或卵从鳃冠基部喷射至水中,体外受精,繁殖力强,受精后约0.8h开始卵裂,生活史经历早期胚胎发育、担轮幼虫、后担轮幼虫、游毛幼虫、后游毛幼虫、刚节幼体及成虫；2)鳃丝具呼吸、感觉、滤食功能,以单细胞藻类和有机碎屑为食；3)担轮幼虫至成体均具眼点,但视觉功能退化；4)对水环境的适应能力极强.讨论了根管虫对生境水质的影响.

Preliminary Observation on Ontogeny of Ficopomatus talehsapensis Pillai ( Polychaeta: Serpulidae)

This study took the experimental observation of Ficopomatus talehsapensis Pillai,2008.The results showed that:1) Dioecism,sperm or egg jetted from crown’s bottom to water,and they fertilize externally,with great propagation;Zygote started the cleavage 0.8 h after its fertilization,and experienced a life history with early embryonic development,trochophore,metatrochphore,nectochaeta,setiger juvenile,metanectochaeta,and imago successively.2) Its branchia coronal has the functions of breath,sense and filter.It feeds on chlorella pyrenoidosa and organic detritus.3) All individuals from trochophore to imago have eyespot,but with degenerative sight.4) It has a great adjustability to water environment.We discussed the impacts on habitat water quality of Ficopomatus in the end as a conclusion.