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Filtering by: Subject Puma -- Food -- Oregon, Eastern

Implications of cougar prey selection and demography on population dynamics of elk in northeast Oregon

Creator:

Clark, Darren A.

Abstract:

Mule deer (Odocoileus hemionus hemionus) and Rocky Mountain elk (Cervus canadensis nelsoni; hereafter elk) populations in northeast Oregon have declined in the past 10 to 20 years. Concurrent with these declines, cougar (Puma concolor) populations have apparently increased, leading to speculation that predation by cougars may be responsible for declining...

Resource Type:

Dissertation

Full Text:

: Implications of Cougar Prey Selection and Demography on Population Dynamics of Elk in Northeast Oregon
Effects of plant community characteristics on insect abundance : implications for sage-grouse brood-rearing habitat

Creator:

Ersch, Erica A.

Abstract:

A causative factor in declining greater sage-grouse (Centrocercus urophasianus) populations is reduced annual recruitment due to poor habitat quality. Sage-grouse population decline is concurrent with a decline in the extent and quality of the sagebrush (Artemisia sp.) biome. However, current research has shown a positive relationship between sage-grouse brood and...

Resource Type:

Masters Thesis

Full Text:

(Formicideae) constituted the majority of the arthropods eaten by chicks in Oregon. An important food in the