Distribution, migration and possible origins of genetically different populations of chum salmon Oncorhynchus keta along the eastern coasts of northern Japan.
Distribution, migration and possible origins of genetically different populations of chum salmon Oncorhynchus keta along the eastern coasts of northern Japan.
复制标题
日本北部东海岸的鲑鱼 Oncorhynchus keta 遗传不同种群的分布、洄游和可能起源。
DOI：
10.2331/suisan.52.983
复制
发表时间：
1986
影响因子：
0.4
通讯作者：
T. Okazaki
中科院分区：
文献类型：
--
作者：
T. Okazaki
根据等位基因频率和一些生物学特性，研究了日本东北部沃茨种群秋季至春季的分布和迁移路径。两个不同的成熟类，即成熟和未成熟的鱼之间观察到秋季收集和显着的等位基因差异。成熟鱼的等位基因差异以及它们的标签回收数据表明，成熟的鲑鱼种群主要由返回日本河流的鱼组成。由于秋季采集的未成熟样品和春季采集的成熟样品在北移过程中统计学上非常相似，因此认为前者与后者有联系。这些鱼的等位基因频率与苏联阿穆尔河地区的已知频率的人口相对应。上述以及最低限度的标记数据表明，未成熟的鱼在南部沃茨越冬，随后迁移到北部，以接近阿穆尔河地区的成熟鱼。
Distribution and migration paths of chum salmon populations distributed in the waters northeast off Japan from autumn to spring were examined based on allelic frequencies and some biological characteristics. Two distinct maturity classes, namely maturing and immature fish were observed among autumn collections and significant allelic differences were found between them. The allelic differences of maturing fish as well as their tag recovery data indicated that maturing chum salmon population mainly consists of the fish returning to Japanese rivers. Since immature collections taken in autumn and maturing collections taken in spring during their northward shifts were statistically very similar, it is considered that the former has a link with the latter. Allelic frequencies of these fish corresponded better with known frequencies of populations of the Amur River area in the Soviet Union. The above as well as minimal tagging data suggest that the immature fish wintercd in southern waters and subsequently migrated to the north to approach the Amur River area as maturing fish.