海洋蔓足类的定向

The Orientation of Marine Cirripede

海洋蔓足类的定向与流、光、基物表面形状及底质的性质有关。海洋蔓足类在宿主体上有不同的定着位置,同一种类在不同宿主体上,定着的位置也不相同。海洋蔓足类定向的方式有四种:1)逆流定向(0°),2)背流定向(±180°),3)与波轴呈垂直方向定向(90°),4)不规则定向(0—±180°)。蔓足类幼虫附着后,随着水流方向的改变可改变方向。定着在蚶外壳的藤壶,壁板形状常发生变化。

1. The orientation of cirripede may be influenced by different current, light and contour of surface substrate, but current is prime. 2. The cirripede have steady situation on the hosts, it relates to current. 3. There are four modes of orientations for cirripede: face upstream (0°); negative to current (±180°); vertical to current and the irregular direction (0°-±180°). 4. When the shell of barnacle is growing, it rotates in according to the changes of the current, especially when it is in its younger period. 5. The different orientation of modes of cirripede at their hosts makes different morphologies, it is helpful to use the current which is produced by the organs of its hosts. 6. The commensal rates of B. cirratus and Arca are related to the bottom sediments. From this point of view, we can tell the nature of bottom sediments.