A Comparison of Methods for Estimating Northern Bobwhite Covey Detection Probabilities

2008 ◽  
Vol 72 (6) ◽  
pp. 1437-1442 ◽  
Author(s):  
Jason D. Riddle ◽  
Christopher E. Moorman ◽  
Kenneth H. Pollock
Keyword(s):  
Northern Bobwhite ◽  
Comparison Of Methods ◽  
Detection Probabilities

Problems with Avian Point Counts for Estimating Density of Northern Bobwhite—A Case Study

2011 ◽  
Vol 2 (1) ◽  
pp. 117-121 ◽  
Author(s):  
Roger D. Applegate ◽  
Robert E. Kissell ◽  
E. Daniel Moss ◽  
Edward L. Warr ◽  
Michael L. Kennedy
Keyword(s):  
Count Data ◽  
Distance Sampling ◽  
Bird Species ◽  
Northern Bobwhite ◽  
Model Fit ◽  
Point Count ◽  
Point Counts ◽  
Occupancy Estimation ◽  
Detection Probabilities

Abstract Point count data are used increasingly to provide density estimates of bird species. A favored approach to analyze point count data uses distance sampling theory where model selection and model fit are important considerations. We used uniform and half normal models and assessed model fit using χ2 analysis. We were unsuccessful in fitting models to 635 northern bobwhite Colinus virginianus observations from 85 avian point locations spanning 6 y (P ≤ 0.05). Most observations (74%) occurred in the outermost (>100-m) distance radius. Our results violated the assumptions that all observations at the point are detected. The assumption that birds were assigned to the correct distance interval also was probably violated. We caution managers in implementing avian point counts with distance sampling when estimating northern bobwhite population density. We recommend exploring other approaches such as occupancy-estimation and modeling for estimating detection probabilities.

A comparison of methods for reducing stress among dental students

1986 ◽  
Vol 50 (9) ◽  
pp. 542-544 ◽  
Author(s):  
CE Howard ◽  
LE Graham ◽  
SJ Wycoff
Keyword(s):  
Dental Students ◽  
Comparison Of Methods ◽  
Reducing Stress

Immunofluorescence of biopsy specimens: comparison of methods of transportation

1978 ◽  
Vol 114 (9) ◽  
pp. 1329-1332 ◽  
Author(s):  
R. J. Nisengard
Keyword(s):  
Comparison Of Methods ◽  
Biopsy Specimens

Comparison of Methods Assessing Vulnerability to Drug Use

2003 ◽  
Author(s):  
Gary Burkholder
Keyword(s):  
Drug Use ◽  
Comparison Of Methods

69. A Comparison of Methods to Measure Aerosol Surface-Area

2004 ◽  
Author(s):  
A. Maynard ◽  
B. Ku ◽  
P. Andresen ◽  
G. Ramachandran ◽  
P. Pai ◽  
...  
Keyword(s):  
Surface Area ◽  
Comparison Of Methods
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