A note on the karyotype of the sable, Martes zibellina brachyura, in Hokkaido, Japan.
2002; Volume: 27; Issue: 1 Linguagem: Inglês
10.3106/mammalstudy.27.83
ISSN1348-6160
AutoresMasahiro A. Iwasa, Tetsuji Hosoda,
Tópico(s)Genetic Mapping and Diversity in Plants and Animals
ResumoGobo Shoko High School, Gobo, Wakayama 644-0012, JapanGenetic contamination resulting from the introduction ofnon-native animals has become a hot issue in conserva-tion biology. The Japanese marten Martes melampusmelampus, which is endemic to Honshu, Shikoku, andKyushu, Japan (Mammalogical Society of Japan 1997),was introduced to Hokkaido, northern Japan, where thesable, M. zibellina brachyura, is indigenous and wherehybridisation between the two species has been antici-pated. The Hokkaido population of M. m. melampus isthought to be descended from individuals that were in-troduced artificially into Hokkaido from Honshu duringthe 1940s/1950s (e.g. Inukai 1975; Hosoda et al. 1999).Over the 60 years since introduction, the distribution ofM. m. melampus has expanded to include a large area ofsouthern and central Hokkaido (Murakami and Ohtaishi2000). Martes zibellina and M. melampus are known to besufficiently closely related, phylogenetically (Hosodaet al. 1997, 1999, 2000; Kurose et al. 1999), to yieldhybrids, although a preliminary genetic survey ofHokkaido’s sable and marten did not show such signs(Hosoda et al. 1999, 2000). In Europe, introgressionof mitochondrial DNA from M. z. to M. martes hasbeen documented (Davison et al. 2001). In order to assess the likelihood of interspecificgenetic crosses occurring, karyological comparisons arenecessary. Differentially stained karyotypes are reportedamong individuals of M. zibellina ssp. from Russia (Gra-phodatsky et al. 1977; Graphodatsky & Radzabli 1988)and of M. m. melampus from Honshu (Obara 1982, 1987,1991), but not from M. z. brachyura from Hokkaido. Inthis study, we analyzed the karyotype of M. z. brachyurain Hokkaido using conventional and differential stainingmethods.
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