首页> 外文期刊>Polar biology >Tergipes Antarcticus (gastropoda, Nudibranchia): Distribution, Life Cycle, Morphology, Anatomy And Adaptation Of The First Mollusc Known To Live In Antarctic Sea Ice
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Tergipes Antarcticus (gastropoda, Nudibranchia): Distribution, Life Cycle, Morphology, Anatomy And Adaptation Of The First Mollusc Known To Live In Antarctic Sea Ice

机译:Tergipes Antarcticus(腹足纲,Nudibranchia):分布,生命周期,形态,解剖学和已知生活在南极海冰中的第一个软体动物的适应

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Tergipes antarcticus (Gastropoda, Nudibranchia) has been reported from Antarctic sea ice twice (1903 and 2008). The extent of its distribution and life history remained unclear. We have evaluated data from several cruises, showing that T. antarcticus is widely distributed in sea ice throughout the Weddell Sea. Adults, juveniles, larvae and egg clutches of T. antarcticus were found in the ice indicating that the species reproduces within this habitat. We collected live material of T. antarcticus for a thorough description of all life stages and to investigate the developmental stages and physiological adaptations. Total developmental time from egg to veliger larvae was relatively short with 31 days (range 13-65 days) at 0℃. Liquid withdrawn from egg clutches and adult T. antarcticus showed clear signs of thermal hysteresis. This is the first report of thermal hysteresis from a sea ice metazoan. We conclude that T. antarcticus is an autochthonous species to Antarctic sea ice.
机译:据报道,南极海冰曾两次(1903年和2008年)报道过南极Tergipes antarcticus(Gastropoda,Nudibranchia)。其分布程度和生活史仍不清楚。我们已经评估了几次航行的数据,表明南极丁香在整个韦德尔海中广泛分布在海冰中。在冰中发现了南极丁香的成年,幼虫,幼虫和卵形抓钩,表明该物种在该栖息地内繁殖。我们收集了南极丁香的活材料,以全面描述所有生命阶段,并调查其发育阶段和生理适应性。在0℃下,从卵到幼虫的总发育时间相对较短,为31天(13-65天)。从蛋抓取器和成年南极锥虫抽出的液体显示出明显的热滞现象。这是海冰后生动物热滞现象的首次报道。我们得出的结论是,T。antarcticus是南极海冰的一种本地种。

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