On the Enigmatical larva nauplius y type I Hansen
On the Enigmatical larva nauplius y type I Hansen
复制标题
关于神秘的无节幼虫 y 型汉森幼虫
DOI：
10.1080/00364827.1970.10411183
复制
发表时间：
1970
期刊：
影响因子：
--
通讯作者：
T. Schram
中科院分区：
文献类型：
--
作者：
T. Schram
摘要在奥斯陆峡湾内不同地点采集了85只nauplius I幼虫。几乎所有的幼虫都是在一年的头六个月内捕获的。此外，约81%的幼虫在不连续层以下采集，其垂直分布近似已知。鹦鹉螺I的幼体被流经德罗巴克海峡（19.5米）的水流带入奥斯陆峡湾内，同时也在成虫已经定居的地方孵化。66只nauplius I（不含突起）的甲壳长度为247 ~ 450 μ，平均长度为284 μ。年长的幼虫比年轻的幼虫有更纤细的外形。精选的标本，代表不同的大小和发育阶段，插图，描述，并与汉森描述的y幼虫进行比较。由此得出结论，来自大西洋的4个标本，分别代表汉森的鹦鹉螺1号、2号和3号，必须归为鹦鹉螺。
Abstract Eighty-five nauplius y I larvae were collected from different localities in the inner part of Oslofjorden. Almost all larvae were caught within the first six months of the year. Furthermore, about 81 % of the larvae, for which the approximate vertical distribution is known, were collected below the discontinuity layer. Nauplius I larvae are being both transported into the inner Oslo-fjord by currents that havc passed the Drobak sill (19.5 m), and are also being hatched in areas where the adults must have been already established. The length of the carapace of 66 nauplius I (processes excluded) varied from 247 μ to 450 μ, the mean length being 284 μ. Older larvae have a more slender form than the younger ones. Selected specimens, representing different size and developmental stages, are illustrated, described, and compared with the y larvae described by Hansen. It is concluded that the four specimens from the Atlantic Ocean, representing Hansen's nauplius I, II, and, III, must be referred to naupl...