Weight and Length in the River Lamprey
Weight and Length in the River Lamprey
复制标题
河七鳃鳗的重量和长度
作者：
L. Larsen
正常情况下，脊椎动物（包括鱼类1，2）的长度即使在长时间禁食期间也不会减少。这条规则不适用于圆口动物。河七鳃鳗（Lampetra fluviatilis（L.）灰色，是已知的经历了相当大的缩短（高达27%3，4）之间的几个月从海洋到河流的迁移在秋季和产卵，并随后死亡在春季。在此期间，动物不吃东西，肠道缩小。
NORMALLY the length of vertebrates (including fish1,2) does not become reduced even during prolonged fasting. This rule does not apply to the cyclostomes. The river lamprey,Lampetra fluviatilis(L.) Gray, is known to undergo a considerable shortening (up to 27 per cent3,4) during the months between its migration from the sea to the rivers in autumn and the spawning and ensuing death in spring. In this period the animals do not eat, and their gut is reduced.