Is water really a barrier for the house mouse? A comparative study of two mouse subspecies

Title:

Is water really a barrier for the house mouse? A comparative study of two mouse subspecies

Creator:

Hiadlovská, Zuzana, Strnadová, Markéta, Macholán, Miloš, and Vošlajerová Bímová, Barbora

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:80deb6b0-148c-49ab-8b25-0c8d37309381
uuid:80deb6b0-148c-49ab-8b25-0c8d37309381

Subject:

dispersal, Mus musculus domesticus, M. m. musculus, swimming, and water barrier

Type:

article, model:article, and TEXT

Description:

House mice are believed to be, unlike rats, only reluctant swimmers. If water is a barrier to mouse dispersal water bodies and streams can have a substantial impact on the genetic structure of populations. Previous studies revealed influence of rivers on the position and structure of the European hybrid zone between two house mouse subspecies, Mus musculus musculus and M. m. domesticus. In this study, we used a simple motivation experiment to test the disposition of both wild and inbred mice representing the subspecies to overcome a water barrier. As the more dispersing sex, males were chosen for the experiment. Mice were tested under two air/water temperature regimes, 20 °C and 10 °C. Contrary to a common belief tested animals entered water rather easily, often even engaging in repeated swimming. We found significant differences in scored behavioural parameters between the subspecies. Under the 20 °C regime, both wild and inbred domesticus males entered and crossed the water earlier and more often swam even when satiated. Strikingly, under the 10 °C regime, the results were rather equivocal but with the opposite tendencies, with musculus males being more willing to swim. We discuss implications of these findings for the hybrid zone dynamics.

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Folia zoologica | 2012 Volume:61 | Number:3-4

Harvested from:

CDK

Metadata only:

false