Contrasting patterns of growth and migration of tropical anguillid leptocephali in the western Pacific and Indonesian Seas
Contrasting patterns of growth and migration of tropical anguillid leptocephali in the western Pacific and Indonesian Seas
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DOI：
10.3354/meps309233
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发表时间：
2006-01-01
影响因子：
2.5
通讯作者：
Tsukamoto, K
中科院分区：
文献类型：
--
作者：
Kuroki, M;Aoyama, J;Tsukamoto, K
为了提高对斑鳗、太平洋鳗、太平洋鳗、塞勒贝鳗和婆罗鳗4种热带鳗鱼幼体洄游和早期生活史特征的认识，对1991年至2002年在西太平洋和印度尼西亚海的8次航行中采集的细头鳗、变态细头鳗和远洋玻璃鳗进行了分析。 A. celebesensis 和 A. Borneensis 的细头虫仅在印度尼西亚群岛中其相对较小的物种范围附近采集，并且被发现比其他 2 个进行小规模本地迁徙的物种生长得更快。大多数采样区都采集到了分布较广泛的A. marmorata 和A. bicolor pacifica。小型细头鳗仅在马里亚纳群岛西部采集到，仅在印度尼西亚海域采集到了较大的标本，变态细头鳗或两种物种的海洋玻璃鳗。这些分布表明，与其他鳗鱼相比，这两个物种具有中等规模的迁徙。所有 4 个物种的细头鱼完全生长时的尺寸似乎都达到了 50 毫米左右，这比温带鳗鱼细头鱼的最大尺寸要小得多，而且它们的生长速度主要快于温带物种。这些数据和最近得出的世界上所有鳗鱼物种之间的分子系统发育关系表明，温带鳗鱼的长时间产卵迁徙是从热带物种的短距离迁徙进化而来的，热带物种的幼体生长更快，最大幼体尺寸更小。
In order to improve understanding of the larval migration and early life history characteristics of 4 tropical eels, Anguilla marmorata, A. bicolor pacifica, A. celebesensis and A. borneensis, the leptocephali, metamorphosing leptocephali and oceanic glass eels collected during 8 cruises in the western Pacific and Indonesian Seas from 1991 to 2002 were analyzed. The leptocephali of A. celebesensis and A. borneensis were collected only in close proximity to their relatively small species ranges in the Indonesian Archipelago and were found to have faster growth than the other 2 species with small-scale local migrations. The more widely distributed species A. marmorata and A. bicolor pacifica were collected in most sampling areas. Small leptocephali of A. marmorata were collected only to the west of the Mariana Islands, and only larger specimens, metamorphosing leptocephali, or oceanic glass eels of both species were collected in the Indonesian Seas. These distributions suggested that the 2 species have intermediate-scale migrations compared to other anguillid eels. The leptocephali of all 4 species appeared to reach a fully grown size of around 50 mm, which is considerably smaller than the maximum size of temperate anguillid leptocephali, and their growth was predominantly faster than that of temperate species. These data and recently derived molecular phylogenetic relationships among all anguillid species in the world suggest that the long spawning migrations of temperate eels evolved from much shorter migrations of tropical species, whose larval growth was faster and whose maximum larval sizes were smaller.