Observations on the reproductive biology of the hydrothermal vent tube worm Riftia pachyptila
Observations on the reproductive biology of the hydrothermal vent tube worm Riftia pachyptila
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热液喷管蠕虫 Riftia pachyptila 生殖生物学观察
DOI：
10.3354/meps052089
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发表时间：
1989
影响因子：
2.5
通讯作者：
N. Holland
中科院分区：
文献类型：
--
作者：
S. Cary;H. Felbeck;N. Holland
在东太平洋隆起13“N的Hydronaut探险中，我们对与幼虫扩散、共生体获取和精子转移有关的繁殖学进行了观察。采集后约15小时，两只雌性在压力室中产卵。在每30min的产卵过程中，较小的富含脂肪的卵从雌性生殖孔大量排出，并在静止的海水中向上漂浮约2厘米-L。因此，早期发育很可能发生在成虫喷口栖息地上方的深水中。两只雄鱼在到达船甲板约45分钟后在非加压水族箱中产卵。从雄性生殖孔发出的精液含有精子束，每束精子由数百个精子组成，顶体明显分离。每一束鞭毛一致拍打着它们在海水中的活力，但不受高于喷口栖息地的硫化氢浓度的抑制。游泳约15分钟后，精子束分裂成相对静止的单个精子。有理由认为，精子束从雄性游到雌性的管子或身体，在那里它们附着在分离的顶体上，然后分解成单独的精子，然后使精子受精
On the Hydronaut Expedition to 13"N on the East Pacific Rise, we made some observations on the reproductive biology of Riftia pachyptila relevant to larval dispersal, symbiont acquisition, and sperm transfer. Two females spawned in a pressure chamber about 15 h after collection. During each 30 min spawning episode, the relatively small (105 pm), lipid-rich eggs were emitted in large numbers from the female gonopores and floated upward in still seawater at about 2 cm min-l. Therefore, it is likely that early development takes place in deep water well above the vent habitat of the adults. Two males spawned in non-pressurized aquaria about 45 min after reaching the deck of the ship. Semen issuing from the male gonopores contained sperm bundles, each composed of several hundred sperm wlth remarkable detached acrosomes. Each bundle swam vigorously through seawater by the beating of all its flagella In unison Motil~ty was not inhibited by hydrogen sulfide concentratlons greater than those at the vent habitat. After swimmlng for about 15 min, the bundles broke up into individual sperm that were relatively immotile. It is reasonable to assume that sperm bundles swim from the male to the female's tube or body where they adhere by their detached acrosomes before disintegrating into individual sperm that subsequently ferhhze the