Results 81 to 90 of about 261,975 (279)

Environmental Impacts of Mountain Biking: Science Review and Best Practices [PDF]

, 2007
Mountain biking is still a relatively new activity whose environmental impact and contribution to trail degradation is poorly understood. As with all recreational pursuits, it is clear that mountain biking contributes some degree of environmental ...
Jeff Marion, Jeremy Wimpey
core  

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

Fatal interactions: pneumonia in bighorn lambs following experimental exposure to carriers of Mycoplasma ovipneumoniae

Journal of Clinical Microbiology
We hypothesized that bighorn sheep ewes with chronic nasal Mycoplasma ovipneumoniae carriage are the source of infection that results in fatal lamb pneumonia. We tested this hypothesis in captive bighorn ewes at two study facilities over a 5-year period,
Logan K. Weyand, Brandi L. Felts, E. Frances Cassirer, Jonathan A. Jenks, Daniel P. Walsh, Thomas E. Besser   +5 more
doaj   +1 more source

Genetic linkage map of a wild genome: genomic structure, recombination and sexual dimorphism in bighorn sheep

BMC Genomics, 2010
Background The construction of genetic linkage maps in free-living populations is a promising tool for the study of evolution. However, such maps are rare because it is difficult to develop both wild pedigrees and corresponding sets of molecular markers ...
Miller Joshua M, Davis Corey S, Hogg John T, Poissant Jocelyn, Maddox Jillian F, Coltman David W   +5 more
doaj   +1 more source

Use of exposure history to identify patterns of immunity to pneumonia in bighorn sheep (Ovis canadensis). [PDF]

PLoS ONE, 2013
Individual host immune responses to infectious agents drive epidemic behavior and are therefore central to understanding and controlling infectious diseases.
Raina K Plowright, Kezia Manlove, E Frances Cassirer, Paul C Cross, Thomas E Besser, Peter J Hudson   +5 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

Wild ruminants as reservoirs of domestic livestock gastrointestinal T nematodes [PDF]

, 2020
Gastrointestinal nematode (GIN) infections in cattle cause appetite suppression which leads to poor feed conversion, reduced weight gain and reduced milk production.
Barone, Carly D., Gilleard, John S., Hoberg, Eric P., Wit, Janneke, Zarlenga, Dante S.   +4 more
core   +1 more source

Age and spatial behavior determine survival of male elk during the hunting season

The Journal of Wildlife Management, Volume 90, Issue 1, January 2026.
We sought to investigate factors that influenced survival of male elk in Montana, USA, during the hunting season using 4 years of movement, age, and survival data. Our findings demonstrate that use of security attributes are the result of behavioral and demographic mechanisms with some age‐based nuances.
Emily R. Gelzer, Tayler N. LaSharr, Anna C. Ortega, Philip Ramsey, Craig Jourdonnais, Kelly M. Proffitt   +5 more
wiley   +1 more source

Assessing senescence patterns in populations of large mammals [PDF]

, 2004
Theoretical models such as those of Gompertz and Weibull are commonly used to study senescence in survival for humans and laboratory or captive animals.
Festa-Bianchet, M., Gaillard, J.-M., Loison, A., Viallefont, A.   +3 more
core   +1 more source

Increased heterozygosity and allele variants are seen in Texel compared to Suffolk sheep [PDF]

, 2004
In this study, the Suffolk and Texel sheep breeds were compared for microsatellite marker heterozygosity throughout seven chromosomal regions in the sheep genome.
A Farid, AF McRae, AJ Ede, AJ Ede, AJ Smith, AN Blattman, AP Dempster, BA Freking, BM Burns, C Charlier, CA Pierson, D Vaiman, DJ Hulme, DM Groth, DS Falconer, E O'Doherty, E O'Doherty, F Tajima, F-W Schwaiger, FC Buchanan, G Simm, GA Gutierrez-Espeleta, GA Walling, HM Henry, J Buitkamp, J Cassinello, J Trowsdale, J Trowsdale, JC Fay, JF Maddox, JF Maddox, JM Penty, K Tabet-Aoul, KP Davies, KP Davies, KP Davies, LM Kossarek, LR Piper, M Carrington, M De Gortari, M Georges, MD Bishop, MR Thurz, PA Swarbrick, PW Hedrick, S Paterson, SJ O'Brien, TH Clutton-Brock, TM Robertson   +48 more
core   +1 more source