Several possible spawning sites of the Japanese eel determined from collections of their eggs and preleptocephali
Several possible spawning sites of the Japanese eel determined from collections of their eggs and preleptocephali
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根据收集的日本鳗鱼卵和前头鳗确定的日本鳗鱼的几个可能的产卵地点
DOI：
10.1007/s12562-021-01519-4
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发表时间：
2021
影响因子：
1.9
通讯作者：
Tsukamoto Katsumi
中科院分区：
文献类型：
--
作者：
Takeuchi Aya;Higuchi Takatoshi;Watanabe Shun;Miller Michael J.;Yama Ritsuno;Fukuba Tatsuhiro;Okamura Akihiro;Okino Tatsufumi;Miwa Tetsuya;Tsukamoto Katsumi
日本鳗鲡的产卵区位于西太平洋马里亚纳海脊南部，但其产卵事件尚未被观测到。为了进一步了解日本鳗鱼的产卵生态，R/VNATSUSHIMA进行了一项跨学科的研究调查（NT 14 -09，2014年5月14日至6月4日），根据海山、盐度锋、新月和第三象限（在锋以南、脊以西产卵）假设探测产卵地点。曾试图用水下摄像系统拍摄产卵事件，并考虑是否可以在水声观测中发现鳗鱼。虽然没有日本鳗鱼或产卵事件的视频记录，也没有鳗鱼集群可以清楚地识别声学，但在5月26日和27日，在第三象限区域13° N或以南的两个站收集了三个鸡蛋。3 ~ 4天后，在较南边的两个站采集到了新孵化的前细头蚴，其中在卵捕获点西南方向> 160 km的一个站采集到224头，在距离卵捕获点较近的两个站也采集到了少量的前细头蚴。这些卵和南方前细头鱼来自离散的产卵事件，这表明2014年5月至少有两个产卵地点。
The spawning area of the Japanese eel is located at the southern part of the West Mariana Ridge in the western North Pacific, but their spawning events have not been observed. To further understand Japanese eel spawning ecology, an interdisciplinary research survey by theR/VNATSUSHIMA (NT14-09, 14 May–4 June 2014) was conducted to detect spawning sites based on the seamount, salinity front, new moon and third quadrant (spawning south of front, west of ridge) hypotheses. Attempts were made to film spawning events with underwater camera systems and to consider if eels might be detected in hydroacoustic observations. Although no Japanese eels or spawning events were video-recorded and no eel aggregations could be clearly identified acoustically, three eggs were collected at two stations in the third quadrant region at or just south of 13° N on 26 and 27 May. Three or four days later, newly hatched preleptocephali were collected at two stations far to the south, including 224 at a station > 160 km southwest of the egg catches, and a few preleptocephali were caught at two stations closer to the egg stations. The eggs and southern preleptocephali were from discrete spawning events, which indicated that at least two spawning sites occurred in May 2014.
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