• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Russian journal of marine biology >Gamete infrastructure in the Arctic Holothurian Molpadia borealis M. Sars, 1859 (Holothuroidea: Molpadiidae)
【24h】

Gamete infrastructure in the Arctic Holothurian Molpadia borealis M. Sars, 1859 (Holothuroidea: Molpadiidae)

机译：北极Holothurian北极M.Sars的配子基础设施，1859年（Holothuroidea：Molpadiidae）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study examines the gonad condition and gamete morphology of the Arctic deep-sea holothurian Molpadia borealis M. Sars, 1859 (Molpadiidae) collected from the Kara Sea in September 2006. The intensive process of gametogenesis observed in the holothurian gonads was close to completion, suggesting upcoming spawning. The sperm ultrastructure in M. borealis is similar to that in most Holothuroidea. This species has classic flagellated sperm, echinosperm, which are typical of animals with external insemination. The sperm head has a 2.5-μm spherical nucleus with a proximal acrosome consisting of a spherical acrosomal vesicle surrounded by periacrosomal material. A single circular mitochondrion located in the sperm mid-piece surrounds the proximal and distal centrioles, which are arranged at an obtuse angle to each other. The eggs of M. borealis are approximately 300 μm in diameter. This suggests indirect development with a plank-totrophic larva. Thistype of development of M. borealis is probably related to life in high latitudes in the deep sea.
机译：这项研究调查了2006年9月从卡拉海采集的北极深海霍洛特人Molpadiaborealis M.Sars（1859年产）的性腺状况和配子形态。在霍洛特尔性腺中观察到的配子形成密集过程已经接近完成，建议即将到来的产卵。北方分枝杆菌中的精子超微结构与大多数壶腹类动物相似。该物种具有经典的鞭毛精子，棘皮精子，是典型的带有外部受精的动物。精子头有一个2.5-μm的球形核，其近端顶体由被顶体周围物质包围的球形顶体囊泡组成。位于精子中段的单个圆形线粒体围绕着近端和远端中心，它们彼此成钝角排列。北极支原体卵的直径约为300μm。这表明使用板条营养型幼虫间接发育。北极支原体的这种发育可能与深海高纬度地区的生活有关。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号