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Origin and evolution of the eels, genus Anguilla

安圭拉鳗鱼的起源和进化

基本信息

批准号：
11691177
负责人：
TSUKAMOTO Katsumi
金额：
$ 14.76万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11691177/
关键词：
eel Anguilla migration evolution adaptation phylogeny taxonomy mDNA 適応機構分子系統塩類細胞耳石

项目摘要

We made expeditions to a total of 17 countries for 575 days during the 1999 - 2001 fiscal years and Obtained the following results.1. Migratory Behavior ; Based on the 5-year survey of glass eel recruitment to the Poigar River estuary on Sulawesi Island, we found that three anguillid species, in order of abundance, Anguilla celebesensis, A. marmorata, and A. bicolor pacifica occurred almost year-round. Otolith microstructure analysis showed that the spawning season of A. celebesensis and A. marmorata was year-round. From the survey in Iceland, we found that the Atlantic eel species, A. anguilla, A. rostrata, recruited to the Icelandic coast, with A. anguilla (95 %) being much more abundant than A. rostrata (5 %). The season of glass eel recruitment in Iceland was limited to around new moon in May and June, and downstream migration of silver eels occurred October to December.2 Taxonomy and Phylogeny : Revision of the 18 species and subspecies of the genus Anguilla was made on specimens collected worldwide. As a result of morphological and molecular analyzes, we concluded that anguillid eels should be classified into 15 species. We also obtained a molecular phylogenetic tree for these 15 anguillid species.3. Cevolution of parasites : Surveys on the monogenean Pseudodactylogyrus on the gills of Anguilla spp. found eight species, including six new ones, on four species of Anguilla distributed in the Far East, Papua New Guinea and Australia. These results show that speciation of these monogeneans occurred along with the adaptive radiation and speciation of the host.During our research program in these three years, we published a total of 47 original papers. To review and synthesize all the results obtained in these studies, we organized an international symposium "Advances in Eel Biology" at the University of Tokyo in September 2001, and published a proceedings of 79 papers submitted to the symposium.

在1999 - 2001财政年度，我们对17个国家进行了为期575天的考察，并获得了以下结果。1.迁移行为;通过对苏拉威西岛波伊加河口玻璃鳗的5年调查，发现该河口有3种鳗类，其数量依次为：西鳗Anguillacelebesensis、西鳗Anguillacelebensis。marmorata和A.太平洋二色瓢虫几乎全年都有发生。耳石显微结构分析表明，产卵季节与产卵期有一定的关系。celebesensis和A. marmorata是全年。在冰岛的调查中，我们发现大西洋鳗鱼A. anguilla、刺尾拟步行虫A. rostrata，与A.欧洲鳗鲡（95%）的数量远多于A.长喙类（5%）。在冰岛的玻璃鳗鱼招聘的季节仅限于5月和6月的新月左右，下游迁移的银鳗鱼发生在10月至12月。2分类和系统发育：修订的18种和亚种的属安圭拉在世界各地收集的标本。通过形态学和分子生物学分析，我们认为鳗鲡属的种类应该分为15种。并对这15种鳗类进行了分子系统发育树的构建.寄生虫的进化：鳗鲡鳃上单殖吸虫拟指环虫的调查。在分布于远东、巴布亚新几内亚和澳大利亚的四种安圭拉上发现了八种，包括六种新种。这些结果表明，这些单殖吸虫的物种形成沿着着宿主的适应性辐射和物种形成。在我们的研究计划中，在这三年中，我们共发表了47篇原创论文。为了对这些研究的结果进行综合和评价，于2001年9月在东京大学召开了“鳗鱼生物学进展”国际研讨会，发表了79篇论文。