• Animal Systematics, Evolution and Diversity
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• v.10 no.2
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• pp.231-243
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• 1994

Samples of Siberian chipmunks (Tamias sibiricus borberi ) from Korea were analyzed by multivariate, air-drying , and blot-hybridization methods in order to determine the degree of variations of morphological characters, chromosomal karyotype, and mtDNA restriction fragment patterns, respectively, Moreover, morphometric characters of samples of Siberian chipmunks from Manchuria(T.sibiricus orientalis) were also analyzed in order to clarify the taxonomic status of the subspecies barberi. Siberian chipmunks from six localities in Korea were in morphometric characters more or less similar with one another and Siberian chipmunks from Manchuria were not so distinct enough to from a subgroup. Siberian chipmunks from Four localities in Korea were identical in their karyotypes (2n=38) : samples from three localities in Korea were nore or less similar in their mtDNA fragment patterns. Siberian chipmunks from Korea appeared to be a omogeneous population and as noted by Corbet (1978) subspecies barberi is the synonym of subspecies orientalis. The scientific name of Siberian chipmunks from Korea and Manchuria is T. sibiricus orientalis, although systematic studies with the samples from North korea, Manchuria and China will be necessary for their taxonomic reconsideration.

• The Korean Journal of Zoology
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• v.33 no.3
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• pp.255-259
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• 1990

The Karyotypes of Korean Sciurus uulgaris coreae and Tamias sibiricus asiaticus were analyzed by the G-banding method. Chromosomes of two species could be identified by G-banding patterns. The banding patterns of chromosomes 9, 10, 12 and X of S. vulgaris coreae were identical to those of chromosomes 6, 9, 12 and X, respectively of T. sibiricus asiaticus. It was shown that chromosomes 4, 10, 7 and 17 of T. sibiricus asiaticus resulted from pericentric inversion of chromosomes 1, 7, 8 and 16 of S. vulgaris coreae. These results suggested that pericentric inversion was an important factor in the karyological differentiation of two species.

• Journal of Korean Society of Forest Science
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• v.108 no.1
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• pp.133-137
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• 2019

This study was conducted to clarify the morphological characteristics of Siberian flying squirrel (Pteromys volans). We investigated 6 morphological characteristics from April, 2014 to March 2016 at Mt. Baekwoon, Wonju, Gangwon province. We found that Siberian flying squirrel showed female-biased sexual dimorphism. This result would be related to reproductive strategy of the species which female nurse offspring alone. As results of comparison of morphological characteristics from Korea, Finland and Japan, both body weight and head-body length appeared heavier and longer from high-latitude to low-latitude. This result suggest that morphological difference between different latitudes would be related with climate and habitat environment. The more researches would be needed with other morphological characteristics of Siberian flying squirrel.

• Korean Journal of Plant Taxonomy
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• v.45 no.1
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• pp.17-21
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• 2015

A new species belonging to Lycopodiaceae Mirb. Huperzia Bernh. s.l. is described and illustrated: Huperzia jejuensis B.-Y. Sun & J. Lim. H. jejuensis has been considered conspecific with H. integrifolia (Matsuda) B. ${\emptyset}$llg. ex. Z. Satou, but it is clearly distinguished by the characteristics of linear-lanceolate leaves with parallel margins from the base to the mid-part, minute dentate margins from the mid-part to the end of the leaf, and cuspidate gemma apex. Because the habitat of the new species was confined to Jeju Island, 'jejuensis' was chosen as the specific epithet of the scientific name of the new taxon.

• Korean Journal of Environment and Ecology
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• v.27 no.5
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• pp.544-549
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• 2013

We studied the habitat sites of Siberian flying squirrel in Guhak-ri, Sillim-myeon, Wonju-si, Gangwon-do from March to April in 2009. We were found total 30 points of inhabitation trace types; nests 15 points(Tree nest types were 13 points, used Tree hole types hole types were 2 points) and droppings 15 points. We observed 3 individuals of Siberian flying squirrels and founded that 2 individuals of them used tree holes, and another individual used tree nest which were located in branches of Pinus densiflora. Most utilized nest trees of Siberian flying squirrel were Larix leptolepis, and also used Pinus densiflora, Betula davurica, Styrax japonica, Cornus controversa, Acer mono. Droppings trees were Prunus sargentii, Cornus controversa, Quercus xmccormickii, Acer palmatum, Acer palmatum, Betula davurica. Through the observation, we defined that flying squirrels mainly used Conifer trees as nest sites, and decideous trees as droppings.

• The Korean Journal of Zoology
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• v.33 no.2
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• pp.222-230
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• 1990

The karyotypes of Korean Sciunis vulgaris coreas and Tamias sibiricus asiaticus were analyzed by conventional Giemsa staining and C-banding method. The diploid chromosome number (2n) of Sciunis vulgaris coreae 40 consisting of 6 metacentric, 8 submetacentric, 3 subtelocentric and 2 telocentric autosome pairs, submetacentric X and acrocentric or subtelocentric Y chromosome. The arm number (NF) of this species was obtained as 72, excluding the gonosomal arms. Tamias sibiricus asiaticus has a 2n of 38. The karyotype was represented by 3 metacentric, 4 submetacentric, 5 subtelocentric and 6 telocentric autosome paits and 2 sex chromosome. The X chromosome was submetacentric chromosome and the Y was the smallest chromosome with a median. The NF was 60. In S. vulgaris coreae constitutive heterochromatins were observed at the centromeres and telomeres. Constitutive heterochnomatins of T sibiricus asiaticus were primarily observed at the centromeres. These results suggested that non-Robensonian reanagenents and distribution of constitutive heterochromatin played an imporiant role in karyological differentiation of these species.

• 월간 기계설비
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• s.271
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• pp.44-45
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• 2013

• River and Culture
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• v.9 no.2
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• pp.83-85
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• 2013

• The Korean Journal of Zoology
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• v.23 no.2
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• pp.89-108
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• 1980

Comparative studies on the parafollicular cells of the some mammalian species from five different orders were carried out; i.e., man from Primates, cattle, pig, and black goat from Artiodactyla, dog from Carnivora, rabbit from Lagomorpha, rat, mouse, and squirrel from Rodentia. For this study, various special techniques for the parafollicular cells, including Grimelius' silver impregnation method (Sawicki and Bajko, 1974), Singh's argentaffin method (Singh, 1964), HCl-toluidine blue stain (Sawicki, 1971), and HCl-lead hematoxylin stain (Solcia et al., 1969), were applied. Authors obtained the following results: 1. Number of parafollicular cells in the same area of thyroid tissues are significantly different from species to species. Number of cells were largest in dog and less cells were found in the following orders; rat, squirrel, mouse, rabbit, cattle, pig, black goat and finally the smallest number in man. 2. Distribution of parafollicular cells within thyroid gland are significantly different from portion to portion in case of cattle, rabbit, squirrel and mouse, but it is not significant in dog, man, pig, black goat and rat (see Table 1-1 and 1-2). 3. In dog, clustered parafollicular cells are located usually in the interfollicular space, and groups of parafollicular cells are located in the para-and/or inter-follicular positions in rabbit. But in the other animals parafollicular cells are found solitarily in the intra-and/or para-follicular positions. 4. The shape of parafollicular cells shows oval to round contour in dog, but it is polymorphic, for example, spindle, conical, oval, round or elongated with cytoplasmic processes, in the other animals. 5. Size of parafollicular cells is larger in cattle, dog and pig, smaller in rat, mouse and squirrel, and medium-size in rabbit, man and black goat. 6. Parafollicular cells of pig, cattle, dog and squirrel are observed to contain densely packed granules, whereas those of mouse, rat and man contain relatively scanty granules. 7. Parafollicular cells of all the mammals show more or less positive reaction to Grimelius' argyrophile silver impregnation method, HCl-toluidine blue stain and HCl-lead hematoxylin stain, whereas they show negative reaction to argentaffin method (see Table 2). 8. Considering the above finding, it is concluded that there are species differences in the distribution, location and shape of parafollicular cells, and infer that preferable staining method should be selected for reliable detection of parafollicular cells, beacuse staining methods applied on the cells in this study show variable reactions according to species.

• Korean Journal of Environment and Ecology
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• v.36 no.4
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• pp.361-367
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• 2022

This study was conducted to identify annual variation of observation and activity pattern of Korean chipmunk (Tamias sibiricus) using camera traps in the Seoraksan and Jirisan National Parks, South Korea from May 2019 to May 2021. The annual variation was identified based on the observed frequency through weekly observations. Daily activity patterns of the species were also analyzed by season. The daily activity pattern of chipmunk appeared to be constantly diurnal across the years regardless of habitat or season. The Korean chipmunks living in the two different regions were observed in different time periods throughout the year. While the chipmunks inhabiting the Seoraksan were observed from 18^th to 45^th week, the chipmunks inhabiting the Jirisan National Park were observed from 7^th to 48^th week. This may be influenced by the hibernation period of chipmunks in the two different regions. In both regions, chipmunks were most frequently observed in autumn. It is considered that seasonal variation on population dynamic and activity patterns of chipmunks were reflected in the observation frequency. Although the observation frequency of camera trap is an indirect indicator and thus having a limitation that it cannot distinguish the population density and amount of activity for the target species, camera trapping is still an effective survey technique for monitoring mammals due to its high accessibility and easy use.