Results 1 to 10 of about 1,402 (164)

Improving population size estimation at western capercaillie leks: lek counts versus genetic methods

Journal of Avian Biology
The western capercaillie Tetrao urogallus, hereafter capercaillie, is the largest galliform bird present in the boreal and montane forests of the Western Palearctic.
Gael Aleix-Mata, Antonio J López-Montoya, Pascal Lapebie   +2 more
exaly   +5 more sources

Visibility bias for sage‐grouse lek counts

Wildlife Society Bulletin, 2017
Declining populations of greater sage‐grouse (Centrocercus urophasianus; hereafter, sage‐grouse) necessitate accurate estimates of population trends. The most widespread approach to monitoring sage‐grouse populations involves counting males attending ...
Kerry P Reese, John W Connelly, Edward O Garton   +2 more
exaly   +4 more sources

Greater sage‐grouse male lek counts relative to a wind energy development

Wildlife Society Bulletin, 2017
Wind energy development is an emerging source of anthropogenic disturbance that could affect greater sage‐grouse (Centrocercus urophasianus; sage‐grouse) populations.
Chad W Lebeau, Jeffrey L Beck, Gregory D Johnson   +2 more
exaly   +4 more sources

Using an individual-based model to assess common biases in lek-based count data to estimate population trajectories of lesser prairie-chickens.

PLoS ONE, 2019
Researchers and managers are often interested in monitoring the underlying state of a population (e.g., abundance), yet error in the observation process might mask underlying changes due to imperfect detection and availability for sampling.
Beth E Ross, Daniel S Sullins, David A Haukos   +2 more
doaj   +4 more sources

Trends in greater sage‐grouse lek counts relative to existing wind energy development in Wyoming

Wildlife Society Bulletin
Rapid increases in wind energy development globally highlight the need to evaluate how electricity generation may impact wildlife. The greater sage‐grouse (Centrocercus urophasianus; hereafter, sage‐grouse) has experienced range‐wide population declines,
Kurt T. Smith, Chad W. LeBeau, Lauren Hoskovec, Jeffrey L. Beck   +3 more
doaj   +3 more sources

Combining Artificial Intelligence and Local Ecological Knowledge to Document the Largest Ever-Counted Cape Buffalo Mega-Herd. [PDF]

Ecol Evol
Large aggregations of wild mammals are declining worldwide, yet opportunistic wildlife videos from non‐scientists can capture rare or ecologically significant events valuable to conservation. Using drone footage of a Cape buffalo megaherd in northern Botswana, we applied automated detection to estimate a total of about 4100 individuals, the largest ...
Bennitt E, Costelloe BR, Koger B, Wielgus E, Masunga G, Caron A.   +5 more
europepmc   +2 more sources

Combined effects of energy development and disease on greater sage-grouse. [PDF]

PLoS ONE, 2013
Species of conservation concern are increasingly threatened by multiple, anthropogenic stressors which are outside their evolutionary experience. Greater sage-grouse are highly susceptible to the impacts of two such stressors: oil and gas (energy ...
Rebecca L Taylor, Jason D Tack, David E Naugle, L Scott Mills   +3 more
doaj   +2 more sources

Volunteer Observer Bias and Sharp-Tailed Grouse Lek Counts in the Upper Midwest

Journal of Fish and Wildlife Management, 2018
Abstract For most species of prairie grouse Tympanuchus spp. standardized monitoring protocols do not exist across adjoining jurisdictions. For instance, researchers monitor relatively small and disjunct populations of prairie sharp-tailed grouse Tympanuchus phasisanellus campestris in Michigan, Wisconsin, and Minnesota using ...
R Gregory Corace
exaly   +2 more sources

Can Reliable Sage-Grouse Lek Counts Be Obtained Using Aerial Infrared Technology?

Journal of Fish and Wildlife Management, 2013
Abstract More effective methods for counting greater sage-grouse (Centrocercus urophasianus) are needed to better assess population trends through enumeration or location of new leks. We describe an aerial infrared technique for conducting sage-grouse lek counts and compare this method with conventional ground-based lek count methods.
Peter S Coates, Coates Peter S
exaly   +2 more sources

Evaluating the Potential of Aerial Infrared as a Lek Count Method for Prairie Grouse

Journal of Fish and Wildlife Management, 2015
Abstract Wildlife biologists use counts of birds attending traditional breeding grounds (i.e., leks) to develop indices of population trends in several grouse species. Standardized lek counts for sage-grouse Centrocercus spp. provide information about population trends by allowing comparison of counts across their range.
Kerry P Reese, John W Connelly
exaly   +2 more sources