ヨメガカサ Cellana toreuma (Reeve) の環境と介殻の變異
ヨメガカサ Cellana toreuma (Reeve) の環境と介殻の變異
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Cellana toreuma (Reeve) 环境和外壳的变化
DOI：
10.2331/suisan.4.31
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发表时间：
1935
期刊：
影响因子：
--
通讯作者：
猪野 峻
中科院分区：
文献类型：
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作者：
猪野 峻
细鳞帽贝是日本常见的沿岸的帽贝，分布于北海道至琉球。本文论述了其壳的变化与环境的关系，特别是其栖息地的水平和海岸波浪的粗糙度，它是暴露。通过确定两个比率，即壳体的长度/高度（L/H）和长度/宽度（L/B），研究了所讨论的变化，结果如下：高水帽贝的L/B值大于低水帽贝，而L/H值则小于低水帽贝。2.当我们比较生活在高水平、暴露于较粗糙波浪的帽贝和生活在相同水平但较平静的海岸的帽贝时，发现前者的L/H值小于后者，而L/B值则相反。换句话说，在波涛汹涌的水面上，贝壳比在平静的水面上更尖，更圆。3.由于这个原因，我们几乎找不到差异，由于这些帽贝的栖息地的水平，不受粗糙的波浪。4.生长在岩石粗糙表面上的帽贝有粗糙的外壳，生长在光滑表面上的帽贝有光滑的外壳。由于水位越低，岩石表面越粗糙，一般来说，低水位的帽贝雕刻得粗糙，而高水位的帽贝雕刻得光滑。
Cellana toreuma (Reeve) is a very common Japanese littoral limpet which is distributed from Hokkaido to Ryukyu. The present paper deals with its shell variations in relation to its environments, especially to the level of its habitat and to the roughness of the coastal waves to which it is exposed. The variations in question were studied by determining two ratios, namely, Length/Height (L/H) and Length/Breadth (L/B) of the shell with the following results: - 1. The value of L/B is larger in the high water limpet than in the low water one and that of L/H is smaller in the former than in the latter. 2. When we compare limpets which live at high level, exposed to rougher waves with those which are found at equal level but on calmer shore, it is found that the value of L/H is smaller in the former than in the latter, but the reverse is the case with that of L/B. In other words, the shell is more highly spired and more circular at rough water than at calm water. 3. For this reason, we can hardly find the difference due to the level of the habitat of those limpets which are not subjected to rougher waves. 4. The limpet that rows on a rough surface of the rock has rough shell and the one that grows on a smooth surface has smooth shell. Since the lower the level, the rougher the rock-surface, the low water limpets are, generally saying, roughly sculptured and the, high water ones smoothly.