Factors Affecting Breeding Success
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منابع مشابه
Longevity in cheetahs: the key to success?
An understanding of the factors governing reproductive success has fundamental implications for population demography, conservation, selection and adaptation. Although a consistent positive correlation between lifetime reproductive success and longevity has been reported for many iteroparous organisms, few studies have explored how longevity influences annual individual performance. In this stu...
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Although differences in breeding lifespan are an important source of variation in male fitness, the factors affecting the breeding tenure of males have seldom been explored. Here, we use cross-species comparisons to investigate the correlates of breeding lifespan in male mammals. Our results show that male breeding lifespan depends on the extent of polygyny, which reflects the relative intensit...
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Gradual decrease in reproductive and demographic indicators of black vultures in Azerbaijan territory has been observed during past several years. To study the reasons we researched the limiting factors that negatively affect the population of black vultures in Turyanchay National Reserve, one of their main settlements and the neighboring areas. It was revealed that shrinkage of food supply is ...
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Gunnison Sage-Grouse (Centrocercus minimus) is a species of concern for which little demographic information exists. To help fill this information gap, we investigated factors affecting nest success in two populations of Gunnison Sage-Grouse. We assessed the relative effects of (1) vegetation characteristics (e.g., shrub height, shrub cover, grass cover, and grass height), (2) temporal factors ...
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We estimated nesting success of a breeding bird assemblage in the central Monte Desert in four breeding seasons (1995–1999). We analyzed the effect of year, period within the breeding season, nest type, and nest location on daily survival rates (DSR). Averaged nesting success of passeriforms in natural habitats was very low ( 20% on average, n=12 species). DSR tended to be lower during the egg-...
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