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Small anadromous Salvelinus malma at the southern limits of its distribution

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Anadromy in the Dolly Varden Salvelinus malma at the southern limits of its distribution were examined by an intensive field survey and measurements of otolith Sr and Ca concentrations. Body sizes of anadromous individuals were small, only slightly larger than those of mature parr, and the degree of anadromy was extremely low.

Keywords: anadromy; evolution; life history; migration; otolith Sr : Ca ratios

Document Type: Research Article


Affiliations: 1: Hokkaido National Fisheries Research Institute, 116 Katsurakoi, Kushiro 085-0802, Japan, 2: International Coastal Research Center, Ocean Research Institute, University of Tokyo, 2-106-1 Akahama, Otsuchi, Iwate 028-1102, Japan, 3: Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 060-0809, Japan and 4: Yamanashi Fisheries Technology Center, Ushiku, Shikishima, Yamanashi 400-0121, Japan

Publication date: April 1, 2005


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