Factors Influencing Bald Eagle Densities in Northcentral Saskatchewan
| Autor: | Jon M. Gerrard, Elston H. Dzus |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
military
Ecology biology Forest management Wildlife military.commander biology.organism_classification Predation Geography Habitat Accipitridae General Earth and Planetary Sciences Bald eagle Netting Coregonus Ecology Evolution Behavior and Systematics Nature and Landscape Conservation General Environmental Science |
| Zdroj: | The Journal of Wildlife Management. 57:771 |
| ISSN: | 0022-541X |
| Popis: | Bald eagle (Haliaeetus leucocephalus) densities vary througbout North America, but reasons for these differences are poorly understood and may be important for directing management practices. Thus, we evaluated the influence of forest nesting habitat and food abundance on the densities of bald eagles on 2 lakes in northcentral Saskatchewan, Canada. We found no evidence that nest-site availability influenced the number of eagles on either lake. Differences in the food supply were investigated both directly by netting fish, and indirectly, through information obtained from biological surveys at Besnard and Nemeiben Lakes. Cisco (Coregonus artedii), a key prey species for eagles, were more common and larger (P < 0.05) in Besnard Lake |
| Databáze: | OpenAIRE |
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