Root Development of Molar Teeth in the Bank Vole (Clethrionomys glareolus)

Lowe, Vaughan

doi:10.2307/3329

Cited by 38 publications

(28 citation statements)

References 6 publications

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“…Age criteria used were mainly those employed by Mazak (1963) and Ha it linger (1965) for C. glareolus but with modifications based on other investigators work (Prychodko, 1951; Z e j d a, 1961Smyth, 1966;Pucek, Ryszkowski & Zejda, 1969;Lowe, 1971;Viitala, 1971). Mazak observed that M, roots began to develop as late as three and one-half months of age whereas Prychodko concluded that molar root development begins as early as two and one-half months of age.…”

Section: Methodsmentioning

confidence: 99%

Circum-annual changes in age, pelage characteristics and adipose tissue in the northern red-backed vole in interior Alaska

Sealander

1972

Acta Theriol.

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Section: Methodsmentioning

confidence: 99%

Circum-annual changes in age, pelage characteristics and adipose tissue in the northern red-backed vole in interior Alaska

Sealander

1972

Acta Theriol.

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“…However, wood mice are characterized by low-crowned molars, whereas voles display high-crowned, hypsodont teeth (Tesakov 1996). Many voles even display ever-growing teeth, although Clethrionomys presents an intermediate stage: molars are first unrooted at the beginning of the post-natal ontogeny, with subsequent apparition of oral and aboral roots that will grow all along the life of the animal (Lowe 1971). It seems that wear, and hence indirectly ARTICLE IN PRESS age, may affect the shape of the occlusal surface in bank voles (Borodin et al 2006), and such an effect has been further proven to be of significant importance in some hypsodont mammals (Bair 2007).…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation in molar outline of bank voles: An effect of wear?

et al. 2010

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Morphometric characters can be of use for elucidating the evolutionary history of species by providing an insight into the selective pressure related to the character of interest, and by allowing integration of fossil specimens. This potential interest of phenotypic characters, however, depends on how much other sources of variation, such as the lifehistory of the animal, may blur an evolutionary signal. For instance, age structure varies along the year, causing in turn various assemblages of wear stages in the teeth sampled at a given place and time. In this context, we investigated the season of trapping as potential source of variation in the size and shape of the molar occlusal surface of the bank vole, Clethrionomys glareolus.The size and shape of the occlusal surface of the third upper molar was quantified using outline analysis in 60 bank voles from Finland, trapped at the same study site in successive spring and autumn. The occlusal surface clearly differed in size and shape between the two seasons of trapping. Using 3D imaging as a visual support, we interpret this difference as the result of differential wear. The population in autumn is dominated by young specimens with unworn teeth whereas spring populations are composed of old animals with worn down molars. The range of seasonal variation in tooth size and shape appears to be of the same order of magnitude as biogeographic variation, demonstrating that differential wear may have a strong impact on biogeographic and evolutionary studies. Yet, beyond the effect of trapping season, a biogeographic signal still emerged, related to the genetic lineages evidenced in other studies. In consequence, morphometric characters such as size and shape of molar occlusal surfaces appear as valuable tracers of biogeographic differentiation, but future studies should take seasonal variations into account for more robust interpretation.

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“…However, in the light of ecological data available for this species the predominance of the spring-generation bank voles in a randomized sample of the winter population is a striking fact, since normally they should constitute a slight percentage of the specimens (Pucek, Ryszkowski & Zejda, 1969/70; Z e j d a, 1971). The method for age determination adopted in this study is undoubtedly charged with a certain error (for details see Lowe, 1971;Zejda, 1971). Assuming the existence of error in the age determined, the smaller weight of the wintering voles than the summer ones may be associated with the different rate of development typical of the autumn generation, which should prevail in the winter sample.…”

Section: Itemsmentioning

confidence: 99%

Seasonal changes in the water content and level in the bank vole against the background of other gross body components

Fedyk¹

1977

Acta Theriol.

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Root Development of Molar Teeth in the Bank Vole (Clethrionomys glareolus)

Cited by 38 publications

References 6 publications

Circum-annual changes in age, pelage characteristics and adipose tissue in the northern red-backed vole in interior Alaska

Circum-annual changes in age, pelage characteristics and adipose tissue in the northern red-backed vole in interior Alaska

Seasonal variation in molar outline of bank voles: An effect of wear?

Seasonal changes in the water content and level in the bank vole against the background of other gross body components

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