Distribution and Life History of Trachidermus fasciatus in Rivers around Ariake Sound, Kyushu, Japan
Distribution and Life History of Trachidermus fasciatus in Rivers around Ariake Sound, Kyushu, Japan
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日本九州有明湾周边河流中带鱼的分布和生活史
DOI：
10.11369/jji1950.41.123
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Hiroki Chikamoto
中科院分区：
文献类型：
--
作者：
T. Takita;Hiroki Chikamoto
对日本九州西部有明海峡和八代海峡的河流中的降河产卵鱼--松江鲈（Trachidermus fasciatus）的分布和生活史进行了研究。这些鱼被发现栖息在福冈县的矢部川和长崎县的本庙川之间的河流中。5月，在河流最低点的水坝下面发现了幼鱼。直到它们的第一个秋天，这些鱼都呆在水坝下面的小区域里。大多数水坝位于河流潮汐河段的上端。我们没有找到T。居住在最低水坝以上地区的带形鱼。它们目前的分布被限制在下游，并局限于不自然的小区域，被认为是由于建造水坝造成的。这些鱼似乎并没有像以前报道的那样向上游迁徙。鱼在第一个秋天或冬天成熟并向下游迁移，此时它们的总长度约为150毫米。在调查的河流中没有发现2岁的鱼。全长小于19 mm的幼鱼主要以桡足类为食，洄游后主要食物由水生昆虫转变为鱼类。
The distribution and life history of the catadromous cottid fish, Trachidermus fasciatus were studied in rivers discharging into Ariake and Yatsushiro Sounds, west Kyushu, Japan. The fish were found to inhabit rivers located between the Yabe River of Fukuoka Prefecture and the Honmyo River of Nagasaki Prefecture. Juveniles were found in May pointing upstream just below dams which were located at the lowest point in the rivers. Until their first autumn, the fish remained in small areas below the dams. Most of the dams were located at the upper end of the tidal reaches of the rivers. We did not find T. fasciatus inhabiting areas above the lowest dam. Their present distribution, which is restricted down-stream and confined to unnaturally small areas, is thought to be caused by the construction of the dams. The fish do not appear to migrate as far upstream as previously reported. The fish mature and migrate downstream in their first autumn or winter, when they are about 150 mm in total length. No age 2 fish were found in the rivers surveyed. Juveniles smaller than 19mm in total length mainly fed on copepods, and their main food changed from aquatic insects to fish after their upstream migration.