Filters: Tags: prey density (X)3 results (86ms)
To investigate whether Northern Goshawk textit(Accipiter gentilis) reproduction is food-limited, we evaluated the reproductive output from 401 goshawk breeding opportunities on the Kaibab Plateau, Arizona during 1999-2002. Concurrently, we estimated densities of 10 goshawk prey species (seven birds, three mammals) using distance sampling. We then assessed the relationship between goshawk productivity (number of fledglings produced) and prey density within and among years by relating the contribution of individual prey species and total prey density to goshawk productivity. We also estimated the proportion of total diet and biomass for each species that contributed ?3% of all prey items. Total prey density was highly...
Categories: Publication; Types: Citation, Journal Citation; Tags: Journal Of Raptor Research, Predator?prey dynamics, accipiter gentilis, diet, distance sampling,
BLM REA YKL 2011 Gray Wolf Current Distribution, ADF&G GMUs and prey density, current, near-term and long-term future status
Gray Wolf Current Distribution, ADF&G GMUs and prey density, current, near-term and long-term future status. These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. The BLM should be cited as the data source in any products...
Types: Live Data; Tags: ADF&G GMUs, BLM, Bureau of Land Management, DOI, Geospatial,
We modeled populations of lynx (Lynx canadensis) and snowshoe hares (Lepus americanus) to determine prey densities required for persistence of lynx translocated to the southern portion of the species' range. The models suggested that a density of 1.1?1.8 hares/h is required for lynx persistence; these densities are higher than those reported for most hare populations across the USA. We found that lynx dispersal and density-independent mortality substantially increased the hare density required for lynx persistence. Reintroduction success was associated with number of release events, total number of animals released, and timing of release relative to the phase of the hare population cycle. However, no release protocol...
Categories: Publication; Types: Citation, Journal Citation; Tags: Biological Conservation, Canada lynx, Lepus americanus, Lynx canadensis, Population modelling,