Results 141 to 150 of about 1,402 (164)

Evaluation of the lek-count index for greater sage-grouse

Wildlife Society Bulletin, 2004
Counts of birds attending leks traditionally have been used as an index to the population size of greater sage-grouse (Centrocercus urophasianus) and, more recently, as a means to estimate population size. The relationship between this index and the actual population has not been studied.
Daniel P Walsh, Gary C White, David C Bowden   +2 more
exaly   +2 more sources

Effects of lek count protocols on greater sage‐grouse population trend estimates

Journal of Wildlife Management, 2016
ABSTRACTAnnual counts of males displaying at lek sites are an important tool for monitoring greater sage‐grouse populations (Centrocercus urophasianus), but seasonal and diurnal variation in lek attendance may increase variance and bias of trend analyses.
Adrian P Monroe, David R Edmunds, Cameron L Aldridge   +2 more
exaly   +2 more sources

Annual male lek attendance influences count‐based population indices of greater sage‐grouse

Journal of Wildlife Management, 2013
ABSTRACTPopulations of greater sage‐grouse (Centrocercus urophasianus) are monitored using counts of males displaying on breeding leks (lek counts). When count‐based indices are used to assess population growth (λ), an implicit assumption is that detection is constant through time and space.
Erik J Blomberg, James S Sedinger, Michael T Atamian   +2 more
exaly   +2 more sources

A hierarchical analysis of lek counts: environmental drivers of abundance for an endangered grassland bird

Journal of Wildlife Management
Abstract Populations of Attwater's prairie‐chicken ( Tympanuchus cupido attwateri ), once widespread across the Gulf Coastal Prairies of North America, remain critically endangered. Lek counts of displaying males provide the primary basis for population monitoring, yet these
Michael F Small, David R Stewart, Sarah E Lehnen   +2 more
exaly   +2 more sources

Sharp‐tailed grouse lek attendance and fidelity in upper Michigan

Journal of Wildlife Management, 2011
To assess and improve existing monitoring protocols for sharp-tailed grouse (Tympanuchus phasianellus) in the eastern Upper Peninsula of Michigan, we used data from 58 radio-collared grouse (46 M, 12 F) monitored within 3 openland landscape types: a ...
R Gregory Corace
exaly   +2 more sources

Improved analysis of lek count data using N‐mixture models

The Journal of Wildlife Management, 2016
ABSTRACTThe greater sage‐grouse (Centrocercus urophasianus) is a species of conservation concern in western North America that is experiencing ongoing population declines due to habitat loss, energy development, disease, and other factors. It is therefore imperative to have robust estimates of population size and trends in this species across its range
Rebecca McCaffery, J. Joshua Nowak, Paul M. Lukacs   +2 more
openaire   +1 more source

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

2023
openaire   +2 more sources

Leucocyte counts variation and measures of male fitness in the lekking Black Grouse

Journal of Ornithology, 2011
Lebigre Christophe, Alatalo Rauno Veli, Kilpimaa Janne, Staszewski Vincent, Siitari Heli   +4 more
openaire   +1 more source

Decision letter for "Improving population size estimation at western capercaillie leks: lek counts versus genetic methods"

2023
openaire   +1 more source

Author response for "Estimating capercaillie <i>Tetrao urogallus</i> population size in Scotland from annual leks and counts of broods over the period 2010–2020"

2023
null David Baines, null Nicholas J. Aebischer   +1 more
openaire   +1 more source