Postembryonic development of the bone-eating worm Osedax japonicus.
Postembryonic development of the bone-eating worm Osedax japonicus.
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食骨蠕虫 Osedax japonicus 的胚胎后发育。
DOI：
10.1007/s00114-013-1024-7
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发表时间：
2013
影响因子：
--
通讯作者：
Y.
中科院分区：
文献类型：
--
作者：
Miyamoto;N.;Yamamoto;T.;Yusa;Y.;Fujiwara;Y.
骨食蠕虫属Osedax专门栖息在海底的脊椎动物的骨头凹陷。Osedaxspp.独特的生活方式和形态。虽然受到了科学界的广泛关注，但其发展的整个过程却没有被观察到。我们在此报道了Osedax japonicusFujikura等（Zool Sci 23：733-740，2006）的胚后发育和定居。受精卵在雌虫的粘液中产卵，担轮幼虫期的幼虫从粘液中游出。幼虫在实验室条件下存活10天。幼虫在骨头上定居，拉长身体，在骨头上爬来爬去。然后它们分泌粘液形成一个管子，触须开始发育。日本野螟的触须起源于口前，而其他类的前附肢则起源于口缘。通过用成年雌性饲养幼虫来诱导侏儒雄性的招募。雌性在定居后6周开始产卵。
Bone-eating worms of the genusOsedaxexclusively inhabit sunken vertebrate bones on the seafloor. The unique lifestyle and morphology ofOsedaxspp. have received much scientific attention, but the whole process of their development has not been observed. We herein report the postembryonic development and settlement ofOsedax japonicusFujikura et al. (Zool Sci 23:733–740, 2006). Fertilised eggs were spawned into the mucus of a female, and the larvae swam out from the mucus at the trochophore stage. Larvae survived for 10 days under laboratory conditions. The larvae settled on bones, elongated their bodies and crawled around on the bones. Then they secreted mucus to create a tube and the palps started to develop. The palps ofO.japonicusarose from the prostomium, whereas the anterior appendages of other siboglinids arose from the peristomium. The recruitment of dwarf males was induced by rearing larvae with adult females. Females started to spawn eggs 6 weeks after settlement.