Taxonomic value of M1 measurements in Microtus agrestis (Linnaeus, 1761) and Microtus arvalis (Pallas, 1779)

Hypothalamo-hypophysial control of ovulation in the vole (Microtus agrestis).

Electrical stimulation of the anterior hypothalamus of the vole, Microtus agrestis, usually results in ovulation, whereas stimulation of areas in the posterior hypothalamus do not. Ovulation can also be elicited by injections of sheep median-eminence extracts, and by preparations ofsheep luteinizing hormone. Observations on the number of corpora lutea formed, and ripe Graafian follicles remaini...

Photoperiodic control of testis activity in the vole, Microtus agrestis.

Under natural conditions the vole (Microtus agrestis) breeds in the spring and summer but not in the autumn and winter. This seasonal change was attributed by Baker & Ranson (1933) to the influence of hours of sunshine, and in the laboratory it has been shown that photoperiod affects the growth ofgonads and maintenance of their activity (Baker & Ranson, 1932; Clarke & Kennedy, 1967; Breed & Cla...

USE OF CHLOROPHACINONE IN THE STRUGGLE AGAINST THE COMMON VOLE (Microtus arvalis Pallas) AND AGAINST THE MUSKRAT Ondatra zibethica L.)

Sebaceous glands on the hindquarters of the vole, Microtus agrestis.

on the hindquarters at the age of about 3 months. In the following 1 to 2 months, hair is lost from these regions revealing raised patches of bright pink skin. Each patch is about 20 mm long and 15 mm wide, has a coarse texture, one or two characteristic folds (Pl. 1, Fig. 1) and a musty odour. Histologically, the skin contains very greatly enlarged holocrine sebaceous glands (Pl. 1, Fig. 2). T...

Burrowing by Common Voles (microtus Arvalis) in Various Social Environments

Female common voles live in groups in large burrows whereas males are probably solitary and promiscuous. At high population density, when burrows become a limiting factor, some females are forced to emigrate from their group. To investigate whether these emigrants could share new common burrows with unrelated neighbours, we analysed in the laboratory burrowing and social behaviour in dyads of u...