Sensitivity analysis to guide population recovery: prairie-chickens as an example
Article Abstract:
Many scattered wildlife populations require intensive management and monitoring. Measuring the sensitivity of population growth to variation in age or stage specific vital rates is one way of evaluating life stage significance. Another way is to use analytical sensitivity analysis to measure elasticity. A simulation-based regression approach is described, to evaluate vital rate effects on population growth of greater prairie-chickens. The modeling process used demographic data and randomly selected vital rate values, parameterizing them in the Leslie matrix population model. The results supported the hypothesis that the greatest effect on population growth is a combination of nest success and brood survival, although elasticities are not a robust index of the vital rate.
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:
Validating the use of artificial nets in predation experiments
Article Abstract:
Open-cup nesting birds suffer from predation, which is often mentioned as an important factor in the decline of migratory songbird populations. A new study investigates the response of predators to artificial nests and natural nests placed in natural locations and in a grid pattern. Quail eggs were placed in natural and artificial robins' nests, which were observed for 15 days. The study shows differing responses to natural and artificial nests, with most predation being from artificial nests in the grid. Results suggest that discretion is needed when making management decisions because of the different predator response to artificial nests.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Temporal patterns of predation on artificial nests in the southern boreal forest
Article Abstract:
Nest predation is often studied using artificial nests as they provide a controlled environment, but differences between artificial and natural nests may influence predator behaviour. A new study seeks to determine when and how nests are destroyed by using artificial nests equipped with a timer, which records the time of day that artificial nests are most vulnerable to predation, and plasticine eggs, which allow predators to be identified by beak and teeth marks. The study shows that there are no times when the nests are safe from predators, with sunrise and sunset being their most vulnerable times.
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:
- Abstracts: Cognitive restoration of reversed speech. Right on in sign language. A common neural code for frequency- and amplitude-modulated sounds
- Abstracts: Design and results of a waterfowl breeding population survey for Wyoming. Evaluation of visibility correction factors for waterfowl surveys in Wyoming
- Abstracts: Visionaries seek UK national strategy. French government tightens its grip on research priorities
- Abstracts: Design and results of a waterfowl breeding population survey for Wyoming. part 2 Waterfowl management: yesterday and tomorrow
- Abstracts: Trends of winter nutritional restriction, ticks, and numbers of moose on Isle Royale. Simulating nitrogen metabolism and urinary urea nitrogen: creatinine ratios in ruminants