Microsatellite variation reveals fine-scale genetic structure of masu salmon, Oncorhynchus masou, within the Atsuta River |
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| Authors: | S. Kitanishi T. Yamamoto S. Higashi |
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| Affiliation: | Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, Japan;, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo, Japan |
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| Abstract: | Abstract – To describe in detail the population genetic structure of masu salmon Oncorhynchus masou , seven anadromous populations in the Atsuta River were investigated by analysis of eight polymorphic microsatellite loci. Exact test and genetic differentiation ( F ST) revealed that significant differentiation was observed at the within-river scale. Principal components analysis revealed that the spatial pattern of genetic composition was related to geographical location of each population. Furthermore, a significant correlation was observed between genetic differentiation and geographical distance, indicating that dispersal is less likely to occur between distant populations. The results of this study imply that masu salmon have potential to show clear genetic structure at the microgeographical scale (21 km) due to precise homing behaviour. |
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| Keywords: | genetic structure within river anadromous microsatellite masu salmon |
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