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ANNUAL SURVIVAL AND POPULATION ESTIMATES OF MOUNTAIN PLOVERS IN SOUTHERN PHILLIPS COUNTY, MONTANA

2003; Wiley; Volume: 13; Issue: 4 Linguagem: Inglês

10.1890/01-5311

1939-5582

Stephen J. Dinsmore, Gary C. White, Fritz L. Knopf,

Rangeland and Wildlife Management

Ecological ApplicationsVolume 13, Issue 4 p. 1013-1026 Regular Article ANNUAL SURVIVAL AND POPULATION ESTIMATES OF MOUNTAIN PLOVERS IN SOUTHERN PHILLIPS COUNTY, MONTANA Stephen J. Dinsmore, Stephen J. Dinsmore Department of Fishery and Wildlife Biology, Colorado State University, Fort Collins, Colorado 80523 USA Present address: Department of Wildlife and Fisheries, Box 9690, Mississippi State University, Mississippi State, Mississippi 39762 USA. E-mail: [email protected]Search for more papers by this authorGary C. White, Gary C. White Department of Fishery and Wildlife Biology, Colorado State University, Fort Collins, Colorado 80523 USASearch for more papers by this authorFritz L. Knopf, Fritz L. Knopf Biological Resources Division, USGS, Midcontinent Ecological Science Center, 4512 McMurray Avenue, Fort Collins, Colorado 80525-3400 USA Present address: Biological Resources Division, USGS, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, Colorado 80526 USASearch for more papers by this author Stephen J. Dinsmore, Stephen J. Dinsmore Department of Fishery and Wildlife Biology, Colorado State University, Fort Collins, Colorado 80523 USA Present address: Department of Wildlife and Fisheries, Box 9690, Mississippi State University, Mississippi State, Mississippi 39762 USA. E-mail: [email protected]Search for more papers by this authorGary C. White, Gary C. White Department of Fishery and Wildlife Biology, Colorado State University, Fort Collins, Colorado 80523 USASearch for more papers by this authorFritz L. Knopf, Fritz L. Knopf Biological Resources Division, USGS, Midcontinent Ecological Science Center, 4512 McMurray Avenue, Fort Collins, Colorado 80525-3400 USA Present address: Biological Resources Division, USGS, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, Colorado 80526 USASearch for more papers by this author First published: 01 August 2003 https://doi.org/10.1890/01-5311Citations: 31 Corresponding Editor: T. D. Sisk Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Information about the demography of declining species is especially relevant to their conservation and future recovery. Knowledge of survival rates and population size can be used to assess long-term viability and population trends, both of which are of interest to conservation biologists. We used capture–recapture techniques to study the demography of Mountain Plovers (Charadrius montanus Townsend) in southern Phillips County, Montana, USA, in 1995–2000. We used the robust design to estimate annual survival (φ), conditional capture (p and r) and recapture (c) probabilities, and the annual population size (N) in the presence of temporary emigration. The results support age-specific differences in annual survival that are a function of juvenile body mass and are correlated with the area occupied by prairie dogs. Body mass had a positive effect on juvenile survival; the slope coefficient for the additive effect of body mass on juvenile survival was 0.77 (95% ci = 0.25, 1.28) on a logit scale. A measure of plover habitat (the area occupied by prairie dogs) appeared to have no effect on survival; the slope coefficient for the additive effect of area occupied by prairie dogs on survival was –0.00004 (95% ci = –0.00003, –0.0001) on a logit scale. Estimated annual apparent survival rates were 0.46–0.49 for juveniles and 0.68 for adult plovers. Using these estimates, the life span of a Mountain Plover was 1.92 ± 0.17 years (mean ± 1 se) from time of capture as a chick. Resighting rates positively influenced capture probabilities; the slope coefficient for the additive resighting effect was –0.49 (95% ci = –0.86, –0.11) on a logit scale. The size of this adult Mountain Plover population was estimated at 95–180 adults annually. Population size closely tracked annual changes in the area occupied by black-tailed prairie dogs, with both plovers and prairie dogs rapidly recovering from an outbreak of sylvatic plague in the mid-1990s. Given the low annual survival rates and low mean life expectancy of Mountain Plovers, we conclude that sustainable local populations are currently maintained by annual rates of productivity greater than those for other ground-nesting birds. Citing Literature Volume13, Issue4August 2003Pages 1013-1026 RelatedInformation