Results 51 to 60 of about 2,273 (203)

Determining Timing of Births and Habitat Selection to Identify Lambing Period Habitat for Bighorn Sheep

Frontiers in Ecology and Evolution, 2020
Timing of births in ungulates is influenced by ecological factors, and differences in seasonality of births have evolutionary implications for these mammals.
Rusty W. Robinson, Tom S. Smith, Jericho C. Whiting, Randy T. Larsen, Justin M. Shannon   +4 more
doaj   +1 more source

Hunting regulations and movements of alpine reindeer

Wildlife Biology, EarlyView.
Most ungulate populations are regulated by hunting, and harvest rate is regulated through quotas and hunting season duration. Hunting is well known to affect behaviour of ungulates, but how annual variation in quotas and hunting season duration affects individual behaviour remains uncertain.
Atle Mysterud, Bram Van Moorter, Olav Strand, Christer M. Rolandsen   +3 more
wiley   +1 more source

Lack of capture‐induced mortality of neonates associated with variation in handling protocols

Wildlife Society Bulletin, EarlyView.
We found that handling metrics (e.g., handling time, number of collectors, and age at capture) had limited or no influence on the survival of neonatal mule deer, desert bighorn sheep, and Rocky Mountain bighorn sheep within the first few days of life. Furthermore, we found that handled mule deer and Rocky Mountain bighorn neonates were recruited at a ...
Marcus E. Blum, Tayler N. LaSharr, Kelley M. Stewart, John T. Hogg, Brittany L. Wagler, Rachel A. Smiley, Katey S. Huggler, Rhiannon P. Jakopak, Mitchell J. Brunet, Rebecca L. Levine, Rebekah T. Rafferty, Samantha P. H. Dwinnell, Benjamin M. Regan, Mike Cox, Brian F. Wakeling, Doug Brimeyer, Gary L. Fralick, Brandon Scurlock, Rusty C. Kaiser, Mark Thonhoff, Patrick W. Burke, Alyson B. Courtemanch, Daryl Lutz, Timothy J. Robinson, Kevin L. Monteith   +24 more
wiley   +1 more source

Separate and synergistic anti‐herbivore effects of non‐glandular trichomes and leaf chemistry in a desert plant

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant defence phenotypes commonly integrate physical and chemical traits that may act synergistically against herbivores, but empirical evidence for synergy as a defence strategy remains limited.
Rosemary A. E. Glos, Abrianna J. Soule, Marjorie G. Weber   +2 more
wiley   +1 more source

Reliability of tooth cementum rings to age bighorn sheep: a blind test

California Fish and Wildlife Journal
Tooth cementum rings often have been considered the most reliable method for aging larger mammals. Tests of this approach have used samples of known ages, but to ensure objectivity this needs to be carried out as truly blind tests.
John D. Wehausen, Christopher J. O’Brien, Dale R. McCullough   +2 more
doaj   +1 more source

Estimating wild bee population size with validated distance sampling

Insect Conservation and Diversity, EarlyView.
Distance Sampling is a promising method to estimate population size but has never been validated on insects. We validated it on a honey bee population of known size. We applied Distance Sampling to three insular pollinators and found that estimates are consistent across days, match species phenology and reflect the expected influence of weather ...
Claudia Bruschini, Marco Penco, Olga Barghigiani, Adele Bordoni, Lorenzo Pasquali, Vania Salvati, Leonardo Dapporto, Alessandro Cini   +7 more
wiley   +1 more source

Comparative functional morphological study of the tarsal joint mobility in artiodactyls and perissodactyls in light of astragalar morphological differences

Journal of Anatomy, EarlyView.
This study investigated how variations in the shape of the astragalus affect tarsal joint behavior, using CT scans. In artiodactyls with a double‐pulley astragalus, the calcaneus shifted plantarly during plantarflexion. This suggests the movement increases hindlimb functional length and contributes to enhanced running speed.
Sei‐ichiro Takeda, Yoichi Masuda, Truong Son Nguyen, Hideki Endo   +3 more
wiley   +1 more source

Indexing body condition of bighorn sheep: potential for concordance among independent investigators?

Wildlife Society Bulletin, 2023
Estimates of body condition or body composition are useful metrics, and consistency among results determined by independent investigators enhances their utility. If concordant, albeit subjective, assessments of body condition can be achieved by personnel
Vernon C. Bleich, Brett P. Wiedmann
doaj   +1 more source

The American Black Bear (Ursus americanus) as an Apex Predator: Investigating the Ecological Role of the World's Most Abundant Large Carnivore

Mammal Review, Volume 56, Issue 1, March 2026.
Black bears as apex predators. American black bears can (1) produce top‐down effects on ungulates equal to or exceeding those of typical apex predators and (2) modify the spatiotemporal behaviour of other carnivores, including pumas and coyotes. We argue that the term ‘apex predator’ is highly context dependent and not a species‐wide status.
John M. Nettles, Caroline M. Abramowitz, Wesley W. Boone, Stephen N. Harris, Chloe E. Horton, Meghan P. Keating, Dana L. Nelson, Samantha N. Smith, Katelyn N. Steen, Erin K. Buchholtz, David S. Jachowski   +10 more
wiley   +1 more source

Preferencias forrajeras del borrego cimarrón (Ovis canadensis, Shaw) en Baja California, México

Revista Mexicana de Ciencias Pecuarias
El propósito de esta investigación fue analizar la composición y preferencias alimentarias del borrego cimarrón en las Sierras Juárez y Santa Isabel durante la época húmeda y seca de 2021-2022. Para evaluar la disponibilidad de forrajee implementaron 17
Ángel Méndez-Rosas, Fernando Isaac Gastelum-Mendoza, Guillermo Romero-Figueroa , Israel Guerrero-Cárdenas , Hiram Rivera-Huerta, Enrique de Jesús Ruiz-Mondragón , Rafael Paredes-Montesinos , Luz Adriana Tapia-Cabazos   +7 more
doaj   +1 more source