Clark’s Nutcracker Breeding Season Space Use and Foraging Behavior
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چکیده
منابع مشابه
Clark’s Nutcracker Breeding Season Space Use and Foraging Behavior
Considering the entire life history of a species is fundamental to developing effective conservation strategies. Decreasing populations of five-needle white pines may be leading to the decline of Clark's nutcrackers (Nucifraga columbiana). These birds are important seed dispersers for at least ten conifer species in the western U.S., including whitebark pine (Pinus albicaulis), an obligate mutu...
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--The hunting behavior of and space use by radio-tagged Eastern Screech-Owls (Otus asio; three pairs, one unmated male, and four fledglings) were observed in central Kentucky from MarchJune 1999. Screech-owls perched at a mean height of 2.2 m. The mean giving up time was 340.2 sec, while the mean time until initiating an attack was 361.4 sec. Owls attacked prey located a mean distance of 2.27 m...
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Foraging behavior often reflects food availability, a resource that may increasingly limit breeding birds as intraspecific crowding increases. Measuring foraging behavior, therefore, provides a way to investigate effects of population density on food limitation, an important link in understanding how crowding functions to regulate populations. We quantified three components of foraging behavior...
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BACKGROUND Marine predators are ecosystem sentinels because their foraging behaviour and reproductive success reflect the variability occurring in the lower trophic levels of the ecosystem. In an era of environmental change, monitoring top predators species can provide valuable insights into the zones of ecological importance that need to be protected. In this context, we monitored the Adélie p...
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ژورنال
عنوان ژورنال: PLOS ONE
سال: 2016
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0149116