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Latitudinal variation in egg size and number in anadromous masu salmon Oncorhynchus masou

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Abstract:

Latitudinal variation in egg size and number in anadromous masu salmon Oncorhynchus masou was examined. Relatively greater variation in egg size occurred among rivers than among females within rivers or within females. Egg size was generally greater and egg number generally lower at more northerly latitudes.

Keywords: Pacific salmon; fecundity; latitudinal cline; offspring size

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1095-8649.2008.02150.x

Affiliations: 1: Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 060-0809, Japan 2: Ishikawa Prefecture Fisheries Research Center, Noto, Ishikawa 927-0435, Japan 3: Toyama Prefectural Fisheries Research Institute, Agricultural, Forestry & Fisheries Research Center, Fisheries Research Institute, Namerikawa, Toyama 936-8536, Japan, 4: Akita Prefectual Fisheries Promotion Center, Oga, Akita 010-0531, Japan 5: Japan Sea National Fisheries Research Institute, Niigata 951-8121, Japan 6: Hokkaido National Fisheries Research Institute, Kushiro 085-0802, Japan

Publication date: 2009-02-01

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