| GrandSkinks {wiqid} | R Documentation |
Multi-season detection data for grand skinks
Description
Results of an occupancy survey of 352 rocky outcrops ("tors") looking for grand skinks. Tors were surveyed up to 3 times per year for 5 years. The surrounding terrain was characterised as natural grassland or pasture.
Usage
data(GrandSkinks)Format
A data frame with 352 observations on the following 16 variables.
- A1, A2, A3, B1, B2, B3, C1, C2, C3, D1, D2, D3, E1, E2, E3
an array of observations of detection (1) or nondetection (0) of skinks for each of 3 occasions in 5 years. NA indicates occasions when a tor was not visited.
- habitat
a factor indicating the type of grassland surrounding the tor.
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
Data distributed with PRESENCE.
References
MacKenzie, D I; J D Nichols; A J Royle; K H Pollock; L L Bailey; J E Hines 2006. Occupancy Estimation and Modeling : Inferring Patterns and Dynamics of Species Occurrence. Elsevier Publishing.
Examples
data(GrandSkinks)
# Extract detection histories:
DH <- GrandSkinks[, 1:15]
occMS0(DH, 3)