Sexual segregation in mountain sheep: resources or predation?
Article Abstract:
A study designed to analyse the cause of sexual segregation in mountain sheep is described. Some 44 sheep, fitted with radio collars, on the Kelso Mountains and the Marl Mountains in California, were studied between 1981 and 1990 to discover the different territories used by males and females. Results of the research show that sexual segregation is probably due to the different reproductive approach of males and females. Females appear to enhance their fitness by limiting risk to their offspring, sometimes at the expense of nutrition, while males maximize their fitness by exploiting high quality habitats, but are more vulnerable to predation.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1997
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Herbivore optimization by North American Elk: Consequences for theory and management
Article Abstract:
The interactions related to density dependence of North American elk and resulting plant responses to herbivory in the Blue Mountains of Oregon USA from1999 to 2001 is examined by experimentally creating a high and low population densities of elk and building exclosures to examine effects of herbivory on productivity and species composition of plants. The responses of plants were found to be consistent with herbivore optimization in response to changing population density of elk in all functional groups of plants including forbs, graminoids, and shrubs.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 2006
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Sexual segregation in black-tailed deer: effects of scale
Article Abstract:
Sexual segregation was studied in a migratory population of Columbian black-tailed deer of northern California from Jun. 20 to Aug. 20, 1992. The effects of spatial and temporal scales on measurements of sexual segregation were also analyzed by dividing the area into 56 16-ha quadrats. The study showed that 80-ha quadrats should have been used in examining the degree of sexual segregation among black-tailed deer in the area of study. The size of a sampling unit is vital in measuring degrees of sexual segregation.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1996
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