Effects of neck collars and radiotransmitters on survival and reproduction of emperor geese
Article Abstract:
Elements of a bird's environment, including being burdened with a marker, should more readily affect clutch size than egg size or laying and hatch date. This research, undertaken among emperor geese along the Manokinak River on the Yukon-Kuskokwim Delta, AK, considered whether marker type influenced survival and breeding propensity. It also compared the timing of nesting, clutch size and egg mass of geese with different types of marker. It is suggested that the negative impact of neck collars and radiotransmitters located on neck collars mainly arises from a chronically increased energetic demand.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 2000
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Effects of gull predation and weather on survival of emperor goose goslings
Article Abstract:
Research is presented concerning the impact of poor weather and predation by glaucous gulls on the survival rates of goslings of the emperor goose between 1993 and 1996 on the Yukon-Kuskokwim Delta, Alaska.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 2001
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Relative effects of survival and reproduction on the population dynamics of emperor geese
Article Abstract:
Emperor geese population levels in Alaska fell in the mid-1960s and have failed to improve since. Wildlife managers need to know how the population will react to external changes, such as seasonal harvesting. The emperor goose has been the subject of annual surveys and studies and is therefore a suitable subject for individual-based population modelling. The model is based on computer-generated units which were subjected to a number of survival and reproductive events determined from field studies. The model revealed that estimates of survival using mark-recapture methods were consistently lower than estimates based on aerial surveys.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1997
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