Age composition of masu salmon smolts in northern Japan |
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| Authors: | H. Hayano&dagger ,Y. Miyakoshi,M. Nagata,K. Sugiwaka&Dagger , J. R. Irvine§ |
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| Affiliation: | Hokkaido Fish Hatchery, Eniwa, Hokkaido 061-1433, Japan;;Department of Fisheries and Forestry, Hokkaido Prefecture, Sapporo, Hokkaido 060-8588, Japan and;Fisheries and Oceans Canada, Pacific Biological Station, Nanaimo, British Columbia, V9T 6N7, Canada |
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| Abstract: | Smolts of anadromous masu salmon Oncorhynchus masou aged 3+ years were found in a northern Japanese river. This is the first recording of 3+ year smolts in Japan. These fish appeared to originate in the cold upper river where 2+ year parr were found during autumn. |
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| Keywords: | 3+ smolt age determination masu salmon parr scale pattern |
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