Zobrazeno 1 - 10
of 23
pro vyhledávání: '"James K. Sheppard"'
Autor:
Sergio David Jiménez Lezama, Luz Francelia Torres González, Nadine Lamberski, Javier Cruz, James K. Sheppard, José I. González Rojas, Miguel Ángel Cruz Nieto, Edwin Alfredo Juarez
Publikováno v:
Bird Conservation International. 31:510-518
SummaryWe report on what appear to be increasing predation events on nesting Thick-billed Parrots Rhychopsitta pachyrhyncha. Thick-billed Parrots are classified as ‘Endangered’ and their seasonal breeding range is restricted to increasingly fragm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6bae3c4f0a32ae2c5a44351b3e4fe93
https://doi.org/10.1017/s0959270920000520
https://doi.org/10.1017/s0959270920000520
Autor:
Octavio R. Rojas-Soto, Fausto Sáenz-Jiménez, Jairo Pérez-Torres, James K. Sheppard, Enrique Martínez-Meyer
Publikováno v:
Bird Conservation International. 31:77-95
SummaryClimate change can cause geographic displacement of the ecological niche of a species, so that similar species that previously did not coexist could begin to face new interactions. Such geographic displacement and increased competition can als
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4011e5e414e57fb6ebb96a20a8e3e0d
https://doi.org/10.1017/s0959270920000271
https://doi.org/10.1017/s0959270920000271
Autor:
D. José Vallejos, James K. Sheppard, Robyn D. Appleton, R. Isaí Sanchez, Megan A. Owen, Russell C. Van Horn, Javier Vallejos, Ronald R. Swaisgood
Publikováno v:
Ursus. 2021
Natal dens are critical for reproduction in bears, yet we know virtually nothing of Andean bear (Tremarctos ornatus) denning ecology, nor whether female Andean bears select dens or den sites with specific characteristics. We analyzed data from 2008 t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bd35a093892593619057b1a733987a1
https://doi.org/10.2192/ursus-d-19-00036.2
https://doi.org/10.2192/ursus-d-19-00036.2
Autor:
Roland Kays, Cris Paunescu, Kevin A. McLean, Charlie Welch, Greg Kravit, Meg Crofoot, James K. Sheppard, Victor Wang
Animals of the rainforest canopies are often endangered by deforestation or hunting but are difficult to survey and study because of the inaccessibility of the treetops, combined with the visual camouflage of many species. Drone-based thermal sensors
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a725d1f385d8007702784f17c20402e
Autor:
Rie Hagihara, Janet M. Lanyon, Helene Marsh, James K. Sheppard, Rhondda E. Jones, Alana Grech
Publikováno v:
Marine Mammal Science. 30:348-366
Diving animals are available for detection from above the water when environmental conditions are favorable and the animals are near the surface. The number of animals that are unavailable for detection needs to be estimated to obtain unbiased popula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8aad3e93c761cf63d4347b1be7584df1
https://doi.org/10.1111/mms.12041
https://doi.org/10.1111/mms.12041
Autor:
Ronald R. Swaisgood, Michael P. Wallace, Catalina Porras, James K. Sheppard, Juan J. Vargas Velazco, Matthew Walenski
Publikováno v:
Behavioral Ecology and Sociobiology. 67:1227-1238
Populations of reintroduced California condors (Gymnogyps californianus) develop complex social struc- tures and dynamics to maintain stable group cohesion, and birds that do not successfully integrate into group hierar- chies have highly impaired su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26d2e21122eb602271548c811b2b487e
https://doi.org/10.1007/s00265-013-1550-5
https://doi.org/10.1007/s00265-013-1550-5
Publikováno v:
Journal of Experimental Marine Biology and Ecology. 399:173-181
Knowledge of the diving behaviour of aquatic animals expanded considerably with the invention of time-depth recorders (TDRs) in the 1960s. The large volume of data acquired from TDRs can be analyzed using dive analysis software, however, the applicat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c7c9239b4aa872e3318a76c6c94b788
https://doi.org/10.1016/j.jembe.2011.01.001
https://doi.org/10.1016/j.jembe.2011.01.001
Autor:
Ronald R. Swaisgood, James K. Sheppard
Publikováno v:
BioScience. 60:626-630
We contend that there is a continuing culture of hopelessness among conservation biologists, one that will affect whom we recruit to academic halls of conservation science, and that will influence our ability to mobilize conservation action among the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9bb48ea452f2bf10b72e485d70441b8b
https://doi.org/10.1525/bio.2010.60.8.8
https://doi.org/10.1525/bio.2010.60.8.8
Publikováno v:
Marine Mammal Science. 26:855-879
The dugong is the only herbivorousmammal that is strictly marine and a seagrass community specialist. The pasture available to the dugong varies with the tides because seagrass occurs in both intertidal and subtidal areas. We GPS-tracked seven dugong
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ccda73c50fd9ac876749b07c1d6d43c
https://doi.org/10.1111/j.1748-7692.2010.00374.x
https://doi.org/10.1111/j.1748-7692.2010.00374.x
Publikováno v:
Journal of Wildlife Management. 73:45-59
Quantifying the factors influencing behaviors of aquatic mammalian grazers may enhance the generic understanding of grazer ecology. We investigated diel and tidal patterns in movements of the dugong (Dugong dugon) by Global Positioning System–track
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a66f4f718caee00387d2aebb0e05c1a2
https://doi.org/10.2193/2007-468
https://doi.org/10.2193/2007-468