Anadromous red-spotted masu salmon (Oncorhynchus masou ishikawae), a southernmost sea-migration form of salmonid, displays low variation in both age at seaward migration and sea age
Anadromous red-spotted masu salmon (Oncorhynchus masou ishikawae), a southernmost sea-migration form of salmonid, displays low variation in both age at seaward migration and sea age
复制标题
溯河产卵的红斑马苏鲑鱼（Oncorhynchus masou ishikawae）是鲑鱼最南端的海洋洄游形式，其向海洄游年龄和海龄均表现出较小的变化
DOI：
10.1111/jfb.14818
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发表时间：
2021
影响因子：
2
通讯作者：
Takuya Sato
中科院分区：
文献类型：
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作者：
Shohei Noda;Rui Ueda;Tatsuya Tanaka;Kotaro Shirai;Daisuke Kishi;Takuya Sato
我们研究了日本两条河流中红癍马苏鲑鱼（Oncorhynchus masou ishikawae）溯河产卵形式的向海迁移和海龄的年龄变化。溯河产卵形式的红斑马苏鲑鱼在两条河流中仅表达了两种海洋迁移模式：（a）大多数鲑鱼（95%，n = 81）为0岁，1岁移民很少（n= 4）;（B）所有检查的鲑鱼（n= 22）在一年内进行了返回迁移，其中23%的鲑鱼在河流中表现出河流洄游。由于其海洋迁徙模式的变化很小，溯河产卵的红斑马苏鲑鱼很可能容易受到环境波动的影响。
We examined variations in age at seaward migration and sea age for the anadromous form of red‐spotted masu salmon (Oncorhynchus masou ishikawae) in two Japanese rivers. The anadromous form of red‐spotted masu salmon expressed only two sea migration patterns in the two rivers: (a) the majority of the salmon (95%,n= 81) were of age‐0, and age‐1 migrants were rare (n= 4); and (b) all the salmon examined (n= 22) made a return migration within a year, with 23% of the salmon exhibiting potamodromy in the river. Owing to low variation in their sea migratory patterns, the anadromous form of red‐spotted masu salmon is likely vulnerable to environmental fluctuations.