Adult philopatry and dispersal in the field vol Microtus agrestis

Autor:	Maria I. Sandell, Johan Nelson, Sam Erlinge, Jep Agrell
Rok vydání:	1991
Předmět:	education.field_of_study biology Ecology Home range Population Zoology biology.organism_classification Population density Intraspecific competition Biological dispersal Philopatry education Microtus Ecology Evolution Behavior and Systematics Sex ratio
Zdroj:	Oecologia. 86:153-158
ISSN:	1432-1939 0029-8549
DOI:	10.1007/bf00317525
Popis:	Using mark-recapture data, we related the movements of adult field voles to population density, sex ratio and population growth. Dispersal movements (defined as distances larger than 1 home range diameter) were few in both sexes; 4 out of 197 (2.0%) in males and 8 of 316 (2.5%) in females. The distance moved between sequential trapping periods was similar for males and females; the mean being 10.2 m and 9.0 m respectively. Both males and females moved larger distances during the breeding season than during the nonbreeding period. The distance moved between sequential trapping periods showed a strong negative relation to density, i.e. both sexes moved shorter distances at higher densities, but there were no differences between periods of increasing and declining population densities. These results contradict the dispersal predictions of all major hypotheses proposed to explain population fluctuations in small mammals. The dispersal patterns fit a geometric distribution, suggesting that competition is the primary factor determining the dispersal characteristics of this population.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::474badea101697b526337ed375d56524 https://doi.org/10.1007/bf00317525 Zobrazit plný text záznamu Full text from SpringerLink