Reproductive success of bald eagles in interior Alaska
Article Abstract:
The processes that explain differences in reproductive success of animal and bird populations need to be understood to provide insights into their management. A new study examines the reproductive success of bald eagles in interior Alaska living near to the limits of their biogeographical ranges and analyses the effect of spring weather conditions, geographic location, year and availability of prey during brood rearing. The study, conducted between 1989 and 1994, shows that the main factor regulating reproductive success is the availability of prey before and after incubation.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1997
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Double-survey estimates of bald eagle populations in Oregon
Article Abstract:
It is often difficult to estimate wildlife opulations, and precision can be improved by using the double-survey method. This has been shown in a study of the bald eagle population of the lower Columbia and Crooked rivers, Oregon. Double survey methods are preferable to durect counts using aircraft, vehicles and boats. Double-survey studies should include two independent observers using a one survey method, or two independent survey methods. The area covered should be large enough to observe at least 40 animals.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1999
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Effects of road management on movement and survival of Roosevelt elk
Article Abstract:
Road closures are commonly used to manage the movement and survival of Roosevelt elk, but there have been no studies on the effects of limiting vehicular access. A study of a limited-vehicle program managed by the Bureau of Land Management in the southern Oregon Coast Range shows an increased survival rate of Roosevelt elk because of a reduction in human disturbance resulting in reduced poaching and a reduction in the elks' daily movements.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
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