Spatial distribution of the yellow-necked mouse (Apodemus flavicollis) in large forest areas and its relation with seed crop of forest trees

摘要: The checking of nestboxes put up in a grid system gives chance to estimate both relative abundance and spatial distribution yellow-necked mice (Apodemus flavicollis) large forest areas. This is difficult achieve using traps due manpower that would be required. Long term investigations carried out Lithuania at two study sites with an area 60 85 ha respectively, showed there was no relation between A. flavicollis autumn the pattern their distribution. When same different years, could random aggregated, as well regular. shown by areas high diversity tree-stands related productivity trees heavy seeds (mainly oak hazel). In separate years used occupy those places where seed crop present. crops hazel failed completely, patterns tended data obtained suggest one practical conclusion: long-term population studies small plots forest, stands, may only reflect situation these specific not necessarily state entire population.