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Full-Text Articles in Life Sciences
Brownian Bridge Movement Models To Characterize Birds’ Home Ranges, Justin W. Fischer, W. David Walter, Michael L. Avery
Brownian Bridge Movement Models To Characterize Birds’ Home Ranges, Justin W. Fischer, W. David Walter, Michael L. Avery
USDA Wildlife Services: Staff Publications
A Brownian bridge movement model (BBMM) is a relatively new concept that estimates the path of an animal’s movement probabilistically from data recorded at brief intervals. A BBMM assumes that locations are not independent, whereas the “classical” kernel-density estimator (KDE) assumes they are. We estimated BBMM home ranges for 11 Black Vultures (Coragyps atratus) and 7 Turkey Vultures (Cathartes aura) equipped with satellite transmitters near Marine Corps Air Station Beaufort, South Carolina, from October 2006 to November 2008. The 95% BBMM home ranges (95% BBMM) of the two Black Vultures that traveled >100 km from the …
Topographic Home Range Of Large Mammals: Is Planimetric Home Range Still A Viable Method?, W. David Walter, Justin W. Fischer, Teresa J. Frink, Scott E. Hygnstrom, Jonathan A. Jenks, Kurt C. Vercauteren
Topographic Home Range Of Large Mammals: Is Planimetric Home Range Still A Viable Method?, W. David Walter, Justin W. Fischer, Teresa J. Frink, Scott E. Hygnstrom, Jonathan A. Jenks, Kurt C. Vercauteren
USDA Wildlife Services: Staff Publications
Topography influences movement trajectories, quality of forages used, and behavioral response of large herbivores to anthropogenic disturbances, but research is lacking on the influence of terrain complexity on size of home range. Size of home range usually is based on planimetric area and therefore rarely accounts for the true surface area traversed by an animal. We conducted radiotelemetry on bighorn sheep (Ovis canadensis), Rocky Mountain elk (Cervus elaphus), mule deer (Odocoileus hemionus), and white-tailed deer (O. virginianus) equipped with VHF collars at three sites from 2002 to 2006 to document size of home range in areas that ranged from 400 …
Home Ranges And Habitat Use Of Brown Pelicans (Pelecanus Occidentalis) In The Northern Gulf Of Mexico, D. Tommy King, Buddy L. Goatchter, Justin W. Fischer, John Stanton, James M. Lacour, Scott C. Lemmons, Guiming Wang
Home Ranges And Habitat Use Of Brown Pelicans (Pelecanus Occidentalis) In The Northern Gulf Of Mexico, D. Tommy King, Buddy L. Goatchter, Justin W. Fischer, John Stanton, James M. Lacour, Scott C. Lemmons, Guiming Wang
USDA Wildlife Services: Staff Publications
Little is known about movements and habitat use of Brown Pelicans (Pelecanus occidentalis) in the northern Gulf of Mexico. We attached satellite transmitters to 18 adult Brown Pelicans (nine males, nine females) that were captured on Grand Isle along the Louisiana coast during 31 August-2 September 2010. Their movements and habitat use were tracked between September 2010 and March 2012. Nine of the Brown Pelicans remained proximate to the Louisiana coast; four ranged along the coasts of Alabama, Mississippi, and Louisiana; three moved from Louisiana to Texas; and two migrated across the Gulf of Mexico to the Yucatan Peninsula. …
Surveillance And Movements Of Virginia Opossum (Didelphis Virginiana) In The Bovine Tuberculosis Region Of Michigan, W. D. Walter, Justin W. Fischer, C. W. Anderson, D. R. Marks, T. J. Deliberto, S. Robbe-Austerman, K. C. Vercauteren
Surveillance And Movements Of Virginia Opossum (Didelphis Virginiana) In The Bovine Tuberculosis Region Of Michigan, W. D. Walter, Justin W. Fischer, C. W. Anderson, D. R. Marks, T. J. Deliberto, S. Robbe-Austerman, K. C. Vercauteren
USDA Wildlife Services: Staff Publications
Wildlife reservoir hosts of bovine tuberculosis (bTB) include Eurasian badgers (Meles meles) and brushtail possum (Trichosurus vulpecula) in the UK and New Zealand, respectively. Similar species warrant further investigation in the northern lower peninsula of Michigan, USA due to the continued presence of bTB on cattle farms. Most research in Michigan, USA has focused on interactions between white-tailed deer (Odocoileus virginianus) and cattle (Bos taurus) for the transmission of the infectious agent of bTB, Mycobacterium bovis, due to high deer densities and feeding practices. However, limited data are available on medium-sized …
Surveillance And Movements Of Virginia Opossum (Didelphis Virginiana) In The Bovine Tuberculosis Region Of Michigan, W. D. Walter, J. W. Fischer, C. W. Anderson, D. R. Marks, T. J. Deliberto, S. Robbe-Austerman, K. C. Vercauteren
Surveillance And Movements Of Virginia Opossum (Didelphis Virginiana) In The Bovine Tuberculosis Region Of Michigan, W. D. Walter, J. W. Fischer, C. W. Anderson, D. R. Marks, T. J. Deliberto, S. Robbe-Austerman, K. C. Vercauteren
USDA Wildlife Services: Staff Publications
Wildlife reservoir hosts of bovine tuberculosis (bTB) include Eurasian badgers (Meles meles) and brushtail possum (Trichosurus vulpecula) in the UK and New Zealand, respectively. Similar species warrant further investigation in the northern lower peninsula of Michigan, USA due to the continued presence of bTB on cattle farms. Most research in Michigan, USA has focused on interactions between white-tailed deer (Odocoileus virginianus) and cattle (Bos taurus) for the transmission of the infectious agent of bTB, Mycobacterium bovis, due to high deer densities and feeding practices. However, limited data are available on medium-sized mammals …