Hi everyone,
there are many studies which prove that the breeding success of raptor populations (or other animals) declines while the breeding densitiv increases. The most common explanation is the habitat heterogeneity hypothesis, saying that additional individuals have to use non optimal habitats when the carrying capacity ot the population is almost reached.
Is there any evidence that individuals from these populations tend to leave their birth areal and search for other habitats in greater distances? Or are raptor populations mainly regulated by their breeding success?
Cheers Tim
Hello Tim; There is a large literature on the population dynamics of the American Kestrel, Falco sparvarius. If you consider the Burrowing Owl to be a raptor, they have also been well studied in the western USA. You might find some of what you are searching for there. Best of luck, Jim Des Lauriers
Changes in the median dispersal distances from year to year of Sparrowhawks did not correlate with changes in population densities (Newton & Marquiss 1983).
https://www.jstor.org/stable/4566
Además de las causas mencionadas, se dispersan por el principio de territorialidad, lo hemos estudiado en Geranoaetus polyosoma
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