海洋蔓足类与宿主动物的共栖关系

蔓足类的宿主动物极为广泛，自海绵动物至脊椎动物皆有代表.生活方式有无机固着生活、兼性共栖和专主共栖3种生态类群，以共栖种类占绝对优势(48.2%).蔓足类在宿主体上的定着位置与其利用水流的方式有关，其形态结构、个体大小与宿主的生物学和习性有关.蔓足类与宿主的共栖还与系统发育有关，较古老的种类主要附着在岩石或其它无机物上，与宿主共栖的种，对宿主无明显选择性;较近代的种，对宿主则有明显选择性.

The Commensal Relationship Between Cirripedes and Its Host Animal

The Host animals of marine Cirripedes cover a quite large range of species. Their representatives spread from Spongia to Vertebrate.According to commensal behaviour, the Cirripedes could be divided into 3 ecological groups : 1) sessile living, 2) compatible commensalism, 3) hostspecificity. Among them the second species are often absolutely dominant ( 48.2% ) . The attaching position of Cirripedes on its host is related to the way of its utilization of water current. The morphological structures and body sizes of Cirripedes are realated to its host's biology and habit. The commensal relationship between Cirripedes and its host animals is related to the systematic development. The more ancient species attache mainly on rock or other inorganic substrate, In the case of commensalism, there is no obvious selectivity to host.