Evidence for protracted and lecithotrophic larval development in the yeti crab Kiwa tyleri from hydrothermal vents of the East Scotia Ridge, Southern Ocean
Evidence for protracted and lecithotrophic larval development in the yeti crab Kiwa tyleri from hydrothermal vents of the East Scotia Ridge, Southern Ocean
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南大洋东斯科舍海脊热液喷口雪人蟹 Kiwa tyleri 的幼虫长期发育和卵磷脂营养性发育的证据
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
P. Tyler
中科院分区：
文献类型：
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作者：
S. Thatje;Kathryn E. L. Smith;L. Marsh;P. Tyler
深海蹲龙虾 Kiwa tyleri（也称为雪人蟹）是栖息在南大洋东斯科舍海脊北部和南部热液喷口的主要大型无脊椎动物。在这里，我们描述了该物种的第一个幼体阶段——形态学上是先进的——并为其发育过程中的卵磷脂营养提供了证据。孵化时的这种形态高级阶段表明早期个体发育期间的扩散潜力可能是有限的。 K. tyleri 成虫通常栖息在温暖的热区和空间限定的通风烟囱温度包络中。相比之下，具有晚期胚胎的产卵雌性被发现远离这些温度，远离排气口。这意味着至少部分胚胎发生是在远离化学合成环境的情况下发生的。幼虫被释放到南大洋的冷水中，这对爬行动物的生存造成了生理限制。幼虫卵磷脂营养可能有助于在这些条件下较长的发育期，并促进发育独立于初级生产的明显季节性。然而，如何实现遥远的热喷发点之间的种群连通性仍然不确定。
The deep-sea squat lobster Kiwa tyleri (also known as yeti crab) is the dominant macroinvertebrate inhabiting hydrothermal vents on the northern and southern segments of the East Scotia Ridge in the Southern Ocean. Here, we describe the first zoeal stage of the species—which is morphologically advanced—and provide evidence for its lecithotrophy in development. This morphologically advanced stage at hatching suggests that dispersal potential during early ontogeny may be limited. Adults of K. tyleri typically inhabit a warm-eurythermal, and spatially defined, temperature envelope of vent chimneys. In contrast, ovigerous females with late embryos are found away from these temperatures, off the vent site. This implies that at least part of embryogenesis takes place away from the chemosynthetic environment. Larvae are released into the cold waters of the Southern Ocean that are known to pose physiological limits on the survival of reptant decapods. Larval lecithotrophy may aid long developmental periods under these conditions and facilitate development independent of pronounced seasonality in primary production. It remains uncertain, however, how population connectivity between distant vent sites may be achieved.
影响因子：
1.7
作者：
S. Thatje;Sally Hall;C. Hauton;C. Held;P. Tyler
通讯作者：
S. Thatje;Sally Hall;C. Hauton;C. Held;P. Tyler
石蟹（十足目、无孔蟹、石蟹科）生命早期阶段的温度依赖性活动：离子和镁调节的作用？
影响因子：
2
作者：
Wittmann AC;Storch D;Anger K;Pörtner HO;Sartoris FJ
通讯作者：
Sartoris FJ