期刊
ICHTHYOLOGICAL RESEARCH
卷 61, 期 1, 页码 1-8出版社
SPRINGER JAPAN KK
DOI: 10.1007/s10228-013-0362-y
关键词
Brook trout; White-spotted charr; Invasion; Directional hybridization
资金
- F-3 project
- S-2 project
- Ministry of Environment of Japan
Invasion status and impacts of nonnative brook trout (Salvelinus fontinalis) in a Hokkaido stream were investigated with field surveys and genetic analyses. Nonnative brook trout was detected in nine (41 %) of the 22 sampled reaches in three tributaries of the Sorachi River, Hokkaido, Japan. Based on the external pigmentation, twelve putative hybrids between brook trout and native white-spotted charr (Salvelinus leucomaenis) were collected in two reaches. Microsatellite and mitochondrial DNA data established that 58% of these hybrids were first-generation (F-1) progenies between male brook trout and female white-spotted charr. Our results suggest potential negative impacts of nonnative brook trout on native charr populations in Hokkaido through interspecific interactions.
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