Even mortality patterns of the two sexes in a polygynous, near‐monomorphic species: is there a flaw?

摘要: The chamois Rupicapra rupicapra has been termed a highly polygynous species, with great male competition for mating. If so, lower survival should be expected the sex. From 1986 to 2000, 1801 carcasses of were collected in Maritime Alps Regional Park, Italy, where protected, healthy, stable population occurred (c. 12 individuals 100 ha−1). Each year, structure from was consistent that count carried out on preceding year live individuals. Demographic features (assessed mortality data, as well counts) showed balanced age and good adult (10% individuals older than 11 years). Mortality peaks cyclic pattern 3–4 years. Winter severity local density affected survival, no significant difference between sexes. number dependent combination snow depth mean temperature, winter. Both sexes nearly same survivorship curves, quite similar life expectancy first (males=6.8 years, females=7.0 years), maximum at death (16 years), it may monomorphic, monogamous species. This is, however, rare event among high females juvenile dispersion, which normally affect survival. two could explained by comparable energetic costs risks reproduction, or through greater fat reserves put males, before rut, their winter mortality.