The effect of gerbils (Tatera brantsii) on primary production and plant species composition in a southern African savanna.

Due to burrowing activity and selective feeding, the highveld gerbil, Tatera brantsii A. Smith, has a great influnce on grassland vegetation. Within old colonies, in comparison to control sites, total biomass of plants was reduced by 47.

Changes in home range size during growth and maturation of the wood mouse (Apodemus sylvaticus) and the bank vole (Clethrionomys glareolus).

A field study was carried out during winter and spring of 1982/83 to determine changes in home range size with increasing body weight and maturation in the wood mouse (Apodemus sylvaticus) and the bank vole (Clethrionomys glareolus). Individual home range sizes in males increased and in females decreased with increasing body weight. Relating these changes to changed energetic requirements failed.