Patterns of Hatching Success in Subarctic Birds

摘要: Data from a single subarctic locality are used to test Ricklef's general conclusions regarding patters of nesting mortality in arctic birds. They provide additional evidence that hatching success is greater among than Temperate Zone passerines. However, they do not indicate important differences between ground—nesting birds with precocial young and those altricial young, nor confirm predator—induced losses density dependent regions. Predation may be more cause failure Ricklefs acknowledged. Differences our findings part sampling methods. further analyses morality should combine data studies selected species regional studies. See full-text article at JSTOR