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Sorex monticolus : ウィキペディア英語版
Montane shrew


The montane shrew (''Sorex monticolus'') is a species of mammal in the family Soricidae commonly known as the dusky shrew. ''Monticolus'' is derived from the Latin root word ''mons'' meaning mountain. It is found in Alaska, western Canada, the western United States the states of Washington, Idaho, Montana, Utah, Colorado, New Mexico, Arizona and Mexico.〔
Habitat
Montane shrews occupy vast niches of moist grassy areas such as meadows and river banks as well as habitats of taiga forests with a large amount of ground litter used for coverage with acidic soils as well as boreal and temperate rain forests.
Morphology
The upper incisors of Sorex monticolus are commonly larger, more robust, and harder than that of its sister taxa group as well having a larger cranial size from the nose to the base of the skull ranging from 16.1 to 17.7 mm in length and a larger palate length. They have five or six paired frictional pads on their hind feet. Its pelage is commonly brown or grey, molted twice a year during September and October with males and females having different molting periods. The color and molting period also depends upon the elevation and location of their niche.
Reproduction
During reproduction sweat and sebaceous glands enlarge in males to indicate male maturity and the odor of pheromones they produce is though to attract available females. Males increase in size by 50% during and in preparation for reproduction events. After mating females may have up to three to four litters and remain in the breeding site and their territory after mating but males leave, indicating no parental care.
Disease
Much like the Tasmanian Devil, montane shrews live in habitats containing other species of shrews and competition for resources such as food and nesting material result in vicious fighting. Wounds procured from this may spread the disease hantavirus through shrew species that compete.
==References==
Erratum. (n.d.). ''Molecular Ecology Mol Ecol,'' 535-535.
Zwolak, R., & Foresman, K. (n.d.). Effects Of A Stand-replacing Fire On Small-mammal Communities In Montane Forest. ''Canadian Journal of Zoology,'' 815-822.
Demboski, J., & Cook, J. (n.d.). Phylogeography of the dusky shrew, Sorex monticolus (Insectivora, Soricidae): Insight into deep and shallow history in northwestern North America. ''Molecular Ecology Mol Ecol,'' 1227-1240.
Smith, M., & Belk, M. (1996). Sorex monticolus. ''Mammalian Species,'' 1-1.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Montane shrew」の詳細全文を読む



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