Dispersal patterns of anadromous and freshwater resident masu salmon at different spatial scales in mid-western Hokkaido, Japan

• Published in: Ichthyological research Vol. 64; no. 1; pp. 111 - 115
• Main Authors: Kitanishi, Shigeru, Yamamoto, Toshiaki, Ishii, Hiromi, Yamaguchi, Yuko, Kobayashi, Toru
• Format: Journal Article
• Language: English
• Published: Tokyo Springer Japan 01-01-2017; Springer Nature B.V
• Subjects: Animal Systematics/Taxonomy/Biogeography; Biomedical and Life Sciences; Deoxyribonucleic acid; Dispersal; DNA; Ecology; Freshwater & Marine Ecology; Life Sciences; Oncorhynchus masou masou; Polymorphism; Rivers; Salmon; Short Report; Zoology; Japan; INW, Japan, Hokkaido; Life-history polymorphism; Geographic scale; Sex-biased dispersal; Microsatellite DNA
• ISSN: 1341-8998; 1616-3915
• DOI: 10.1007/s10228-016-0525-8

To evaluate the influences of spatial scale on dispersal, the dispersal patterns of masu salmon
Oncorhynchus masou masou
were investigated at among-river (ca. <43 km) and within-river levels in mid-western Hokkaido, Japan. A genetic differentiation (
F
ST
) and assignment test showed that among-river dispersal was much less common (2.9 % of 339 individuals) than within-river dispersal (7.4 % of 190 individuals). We also found that there was no bias in dispersal at the among-river level, while anadromous males were more likely to disperse at the within-river level, suggesting that the dispersal patterns may be scale dependent.