|
|||||
|
|
Age composition of masu salmon smolts in northern Japan |
|
| Authors: | H Hayano† Y Miyakoshi M Nagata K Sugiwaka‡ J R Irvine§ |
| Institution: | 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 |
| 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. |
| Keywords: | 3+ smolt age determination masu salmon parr scale pattern |