Sympatric spawning of Anguilla marmorata and Anguilla japonica in the western North Pacific Ocean
Sympatric spawning of Anguilla marmorata and Anguilla japonica in the western North Pacific Ocean
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DOI：
10.1111/j.1095-8649.2009.02299.x
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发表时间：
2009-06-01
影响因子：
2
通讯作者：
Tsukamoto, K.
中科院分区：
文献类型：
--
作者：
Kuroki, M.;Aoyama, J.;Tsukamoto, K.
在北太平洋西部北赤道流地区的重叠区域，大量收集了温带日本鳗鲡和热带巨型斑纹鳗鲡的幼虫。从1991年到2007年的9次调查中收集的189只黑鳗和bbbb2500只日本鳗鲡幼虫表明，这两种鳗鲡在西马里亚纳海岭南部以西有相似的产卵区。2006年7 ~ 8月和2007年8月，经形态和遗传鉴定的麻蚶主要采集在北纬14.5 ~ 15度和东经142 ~ 142.5度之间，在同一网带也有捕获到日本麻蚶。但每拖尾收集到的黑斑姬蜂（n = 31）少于日本姬蜂（n = 165），每拖尾收集到的黑斑姬蜂小幼虫数量也少于日本姬蜂（n = 1 ~ 10）和1 ~ 294)，说明黑斑姬蜂的产卵聚集量相对较小。在经度（东经131 ~ 143度）和纬向（北纬12 ~ 17度）上，麻麻麻的前肢头蝇和小幼虫分布范围均大于粳稻（东经137 ~ 143度）。虽然这两个物种的产卵在空间和时间上都是重叠的，但北太平洋a . marmorata种群的热带鳗鱼可能有一个更长的产卵季节，产卵量更少，至少在夏天，并且在更宽的纬度范围内生长栖息地。
Extensive collections were made of the larvae of the temperate Japanese eel Anguilla japonica and the tropical giant mottled eel Anguilla marmorata in an overlapping area of the North Equatorial Current region of the western North Pacific Ocean. Collections of 189 A. marmorata and > 2500 A. japonica larvae during nine surveys from 1991 to 2007 showed that these two anguillid eels have similar spawning areas just west of the southern West Mariana Ridge. In July to August 2006 and August 2007, morphologically and genetically identified A. marmorata preleptocephali were mainly collected between 14.5-15 degrees N and 142-142.5 degrees E, where A. japonica preleptocephali were also caught in some of the same net tows. Fewer A. marmorata preleptocephali, however, were collected (n = 31) compared to those of A. japonica (n = c. 165), and fewer small larvae of A. marmorata were collected per tow than A. japonica (n = 1-10 and 1-294, respectively), suggesting relatively smaller spawning aggregations of A. marmorata. The distribution of preleptocephali and small larvae was wider in longitude in A. marmorata (131- 143 degrees E) than in A. japonica (137-143 degrees E), while the latitudinal range was almost the same (12-17 degrees N). Although spawning by these two species overlaps both spatially and temporally, the tropical eels of the North Pacific population of A. marmorata probably have a much longer spawning season with fewer spawners, at least in summer, and recruit to a much wider latitudinal range of growth habitats.