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Fig. 20. Map showing the Utabetsu River in southern Hokkaido and sampling stations on the Kami-Utabetsu River. Small rectangular area shows sampling area of the Kami-Utabetsu river. Modified from Sci. Rep. Hokkaido Salmon Freshwater Fish. Res. Inst., 1, Mizuno et al., Assessment of nutritional conditions using kidney melano-macrophage density in hatchery-reared juvenile masu salmon Oncorhynchus masou released into a stream, 49–53, © 2011, Hokkaido Salmon and Freshwater Fisheries Research Institute.

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