Offshore spawning of Conger myriaster in the western North Pacific: evidence for convergent migration strategies of anguilliform eels in the Atlantic and Pacific
Offshore spawning of Conger myriaster in the western North Pacific: evidence for convergent migration strategies of anguilliform eels in the Atlantic and Pacific
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DOI：
10.1007/s00114-011-0787-y
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发表时间：
2011-04
影响因子：
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通讯作者：
Michael J. Miller;T. Yoshinaga;J. Aoyama;T. Otake;N. Mochioka;H. Kurogi;K. Tsukamoto
中科院分区：
文献类型：
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作者：
Michael J. Miller;T. Yoshinaga;J. Aoyama;T. Otake;N. Mochioka;H. Kurogi;K. Tsukamoto
普通的日本海豚Conger myriaster的产卵区仍然未知，因为产卵的成鱼或其新孵化的幼体从未被收集到。通过遗传鉴定，我们确定了c.在北太平洋西部遥远的近海产卵，就在日本鳗鱼产卵区的西面。2008年6月，6只新孵化的C。在东缘采集到5.6-6.9 mm的多星幼虫，此前曾在那里采集到许多7-20 mm的小型不明头节幼虫。FC的近海产卵地点。在马尾藻海与美国康格尔鳗鱼和美洲鳗鱼相似，这表明在北大西洋和太平洋亚热带环流中，鳗鱼和康格尔鳗鱼的大规模繁殖迁徙策略发生了趋同的进化。人们意识到，两种蜥蜴，一种叫A.rostrata.Jumonica，和两种松花鱼C.Ocean anicus和C.在遥远的海洋盆地中进化出几乎相同的迁徙策略表明，幼体生存和招募的自然选择成功导致了鳗鱼在系统发育上相距遥远的两个分类群中进行长时间的近海产卵迁徙。
The spawning area of the common Japanese conger,Conger myriaster, had remained unknown because spawning adults or its newly hatched larvae were never collected. Using genetic identification, we determined thatC. myriasterspawns far offshore in the western North Pacific, just west of the spawning area of the Japanese eel,Anguilla japonica. In June 2008, six newly hatchedC. myriasterlarvae, 5.6–6.9 mm, were collected at the eastern edge of where many small unidentifiedCongerleptocephali (7–20 mm) were collected previously. The offshore spawning location ofC. myriasteris analogous to that of the American conger eel,Conger oceanicus, and the American eel,Anguilla rostrata, in the Sargasso Sea, suggesting that convergent evolution of large-scale reproductive migration strategies in both anguillid and conger eels has occurred in the north Atlantic and Pacific subtropical gyres. The realization that two anguillids,A. rostrataandA. japonica, and two congers,C. oceanicusandC. myriaster, have evolved almost identical migration strategies in widely separated ocean basins suggests that natural selection for larval survival and recruitment success has resulted in long offshore spawning migrations in two phylogenetically distant taxa of anguilliform eels.