| MeadowVoles {wiqid} | R Documentation |
Robust design mark-recapture data for meadow voles
Description
Data for adult male meadow voles Microtus pennsylvanicus from a live-trapping study at Patuxent Wildlife Research Center (Nichols et al 1984). Trapping was carried out for 5 consecutive nights each month for 6 months (June to December 1981).
Usage
data(MeadowVoles)Format
A data frame with 171 observations on the following 31 variables.
- A1, A2, A3, A4, A5, B1, B2, B3, B4, B5, C1, C2, C3, C4, C5, D1, D2, D3, D4, D5, E1, E2, E3, E4, E5, F1, F2, F3, F4, F5
a 1/0 array of capture data for voles for each of 5 occasions per month for 6 months.
- freq
a column with -1/1, where -1 indicates that the animal was not released after the last recorded capture.
Details
The data are provided as a data frame, such as would result from reading in data from a text file. Further formatting is needed before using these for analysis: see the examples.
Source
Williams, Nichols, Conroy (2002) Analysis and Management of Animal Populations: Modeling, Estimation, and Decision Making Academic Press, San Diego CA
References
Nichols, Pollock, Hines (1984) The use of a robust capture-recapture design in small mammal population studies: A field example with Microtus pennsylvanicus. Acta Theriologica 29:357-365.
Examples
data(MeadowVoles)
# Extract detection histories:
DH <- MeadowVoles[, 1:30]
freq <- MeadowVoles$freq
survRD(DH, freq=freq, occsPerSeason=5)