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Increased Egg Conservation-Is It Essential For Recovery Of Whooping Cranes In The Aransasiwood Buffalo Population?, James C. Lewis
Increased Egg Conservation-Is It Essential For Recovery Of Whooping Cranes In The Aransasiwood Buffalo Population?, James C. Lewis
Proceedings of the North American Crane Workshop
The whooping crane (Grus americana) is in a race for survival against adversities (genetic, demographic, and environmental) that are only partially understood. There is increasing evidence of genetic problems (drift, inbreeding, and loss of heterozygosity) in the captive population that likely also exist in the wild Aransas-Wood Buffalo Population (A WP), a consequence of the 1940s population bottleneck. Small populations are vulnerable to extinction through catastrophic events and random changes in productivity or survival. Negative environmental effects faced by whooping cranes include upstream diversion which diminish freshwater (nutrient) inflow into Texas wintering habitats, and expanding human activities along …
Modeling Viable Mammal Populations In Gap Analyses, Craig R. Allen, L. G. Pearlstine
Modeling Viable Mammal Populations In Gap Analyses, Craig R. Allen, L. G. Pearlstine
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Gap analysis is an approach to conserving biological diversity that maps species richness and identifies sites that ought to be protected but are not in conservation networks. Gap analyses based on species richness may have high error rates when species models are based solely on species-habitat association, because patches too small to support populations are still considered to be potential habitat. We incorporated information on the home range and dispersal distances of the mammals of Florida to estimate minimum critical areas (MCA) to support minimum viable populations for each mammal species. Incorporating MCA decreases the area occupied by the highest …
Ec01-150 Range Judging Handbook And Contest Guide For Nebraska, James T. Nichols, Peter N. Jensen
Ec01-150 Range Judging Handbook And Contest Guide For Nebraska, James T. Nichols, Peter N. Jensen
University of Nebraska-Lincoln Extension: Historical Materials
Range judging contests can be a challenging and effective learning tool for everyone - youth, adults, beginners, professionals - whether from rural or urban areas. This circular provides information about Nebraska's rangelands and grasslands. It is designed to help individuals and teams prepare for range judging contests and to learn more about rangeland and its management. Each of the nine sections that follow corresponds to a section on the range judging scorecard used in contests.