Growth conditions after recruitment determine residence-emigration tactics of female Japanese eels Anguilla japonica
Growth conditions after recruitment determine residence-emigration tactics of female Japanese eels Anguilla japonica
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招募后生长条件决定雌性鳗鲡的留迁策略
DOI：
10.1007/s12562-016-1006-8
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发表时间：
2016
影响因子：
1.9
通讯作者：
N. Mochioka
中科院分区：
文献类型：
--
作者：
Ryoshiro Wakiya;K. Kaifu;N. Mochioka
对采自日本鹿儿岛土川河淡水地点的 156 条黄相雌性鳗鲡进行反算，比较上游鳗鱼（“上游移民”）、下游大鳗鱼（≥240 mm）和下游小鳗鱼（<240 mm）的年生长情况。 （“未确定”，包括未来的移民和居民）阐明日本鳗鱼的生长条件和栖息地选择之间可能的关系。下游捕获的鳗鱼最小年龄为1岁，而上游捕获的鳗鱼年龄>3岁。反算下游捕捞的大鳗鱼在捕捞后的前3年（0-2岁）的年生长量显着高于上游鳗鱼，而下游的小鳗鱼则处于中等生长状态。这些结果表明，这条河中的雌性鳗鱼在被招募后大约三年左右就会决定是否迁移或居住在下游，生长较慢的鳗鱼迁移到上游，而生长较快的鳗鱼则居住在下游。
Back-calculated annual growth of 156 yellow-phase female Japanese eels Anguilla japonica sampled from freshwater sites in the Tsuchikawa River, Kagoshima, Japan, were compared among eels from the upper reaches (“upstream emigrants”), large eels (≥240 mm) from the lower reaches (“downstream residents”), and small eels (<240 mm) from the lower reaches (“undetermined”, including future emigrants and residents) to elucidate the possible relationships between growth conditions and habitat selection by Japanese eels. The youngest eels caught in the lower reaches were 1 year of age, whereas eels in the upper reaches were >3 years of age. Back-calculated annual growth of large eels captured in the lower reaches was significantly greater than that of eels in the upper reaches for the first 3 years after recruitment (age 0–2 years), and small eels in the lower reaches had intermediate growth. These results suggest that female eels in this river decide whether to emigrate or reside in the lower reaches approximately 3 years after recruitment, and that slower-growing eels emigrate upstream, whereas faster-growing eels reside downstream.
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影响因子：
1.9
作者：
Ishikawa, S;Aoyama, J;Nishida, M
通讯作者：
Nishida, M
西北太平洋淡水鳗鱼的海洋洄游和产卵生态
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
Watanabe;et al.;Tsukamoto K.
通讯作者：
Tsukamoto K.
黄相日本鳗鲡在日本湾朝日河水系招募后的扩散
影响因子：
1.4
作者：
Kaifu K.;Tamura M.;Aoyama J.;Tsukamoto;K.
通讯作者：
K.
影响因子：
1.4
作者：
Okamura, Akihiro;Yamada, Yoshiaki;Tsukamoto, Katsumi
通讯作者：
Tsukamoto, Katsumi