harb.samp.dp: Harbour Porpoise sample data from 1994 SCANS survey

In DistanceDevelopment/WiSP: Wildlife Simulation Package (wisp)

Description

The data in harb.samp are harbour porpoise sightings data from the shipboard component of the 1994 Small Cetacean Abundance in the North Sea (SCANS) survey in the North Sea. An analysis of these data is published in Borchers et al. (1998). The dataset harb.samp.dp is a sample object of class sample.dp and contains the following items:

• "population"Sample information for the observed population; includes exposure, groupsize and types

• "design"Design information including the number of transects and survey effort

• "detected.observer1"An array the jth element of which is a 1 if the first observer saw the jth distinct animal and 0 if they did not.

• "detected.observer2"An array the jth element of which is a 1 if the second observer saw the jth distinct animal and 0 if they did not.

• "detected"An array the jth element of which is a 1 if the jth group was detected.

• "distance"Perpendicular distances from the observer to the detected animals.

• "transect"Index showing from which transects the animals were detected

• parentsInformation that is required by WiSP - you can ignore it.

• createdInformation that is required by WiSP - you can ignore it.

• seedInformation that is required by WiSP - you can ignore it.

Usage

data(harb.samp.dp)

Format

An R sample object of class 'sample.dp'

Source

1994 SCANS survey in the North Sea

References

Borchers, D.L., Buckland, S.T., Goedhart, P.W., Clarke, E.D. and Hedley, S.L. 1998. Horvitz-Thompson estimators for double-platform line transect surveys. Biometircs 54: 1221-1237.

DistanceDevelopment/WiSP documentation built on Sept. 18, 2020, 2:55 p.m.