Evolution of the Freshwater Eels
Evolution of the Freshwater Eels
复制标题
淡水鳗鱼的进化
DOI：
10.1007/s001140050340
复制
发表时间：
1997
影响因子：
--
通讯作者：
K. Tsukamoto
中科院分区：
文献类型：
--
作者：
J. Aoyama;K. Tsukamoto
淡水鳗有一个不寻常的生活史和世界各地的分布。关于这一群体的系统发育关系以及它们的长期产卵迁移和幼虫阶段如何有助于它们的全球分布的问题还没有得到解决。本文首次介绍了安圭拉种的分子系统发育，并在此系统发育树的基础上提出了这一群体进化的新方面。也就是说，祖先鳗鱼起源于始新世或更早，在今天印度尼西亚附近的西太平洋。由这一祖先衍生的一个群体向西扩散，可能是通过特提斯海北方边缘的全球环赤道流中的幼虫运输。这个群体分裂成欧洲和美洲鳗鱼的祖先，进入大西洋，第二个群体向南扩散，分裂成东非物种和澳大利亚物种。因此，鳗鱼科的世界范围内的分布可以从大陆漂移，洋流，一个专门的幼虫和进化的力量，有利于分散和分离的基因库的物种形成的知识来理解。
The freshwater anguillid eels have an unusual life history and world-wide distribution. Questions about the phylogenetic relationships of this group and how their long spawning migrations and larval phase may contribute to their global distribution have not been addressed. This paper is first presentation of molecular phylogeny of Anguilla species, and based on this phylogenetic tree we suggest new aspect of the evolution of this group. Namely, ancestral eels originated during the Eocene or earlier, in the western Pacific Ocean near present-day Indonesia. A group derived from this ancestor dispersed westward, probably by larval transport in the global circum-equatorial current through the northern edge of the Tethys Sea. This group split into the ancestor of the European and American eels, which entered into the Atlantic Ocean, and a second group, which dispersed southward and split into the east African species and Australian species. Thus the world-wide distribution of the eel family can be understood from knowledge of continental drift, ocean currents, a specialized larva and evolutionary forces favoring dispersal and speciation of segregated gene pool.