MUS-DOMESTICUS IN WESTERN BOHEMIA - A NEW MAMMAL FOR THE CZECH-REPUBLIC

Fifty-one house mice from the western part of the Czech Republic were examined. Both morphological and biochemical investigations revealed t he presence of M. domesticus, in the vicinity of the towns of Cheb and As. On the contrary, M. musculus was only found in Kostelni Briza, a village situated about 18 km east of Cheb. A hybrid zone was apparent between the two species, running approximately in the north-south dire ction through the study area. This is the first evidence of a stable p opulation of M. domesticus in the Czech Republic.