caribou: Animal counts from aerial survey of caribou

In david-borchers/sampling: Module MT4608 Sampling Theory Practical Package

Animal counts from aerial survey of caribou

Description

A data frame with each row corresponding to a transect line flown by the survey plane. The observers in the plane search out to a distance of half a mile either side of the plane. The survey was stratified in to two strata, and stips 1 mile wide chosen by simple random sampling separately in each stratum. Columns are as follows:

• "transect": Transect number (1 to 15)

• "length": Length, in miles, of the transect line

• "stratum": The survey stratum number

• “count”: The number of caribou counted from the transect line

• “area”": The surface area of the stratum. Note that this number is repeated for every row of data in the stratum.

• “N”: The number of strips in each stratum. Note that this number is repeated for every row of data in the stratum.

Usage

data(caribou)

Format

A data frame

Source

Valkenburg and Harbo (1979)

References

Valkenburg, P. and Harbo, S. 1979. Refinement of the aerial photo–direct count–extrapolation caribou census technique. Final research report W–17–11. Alaska department of fish and game wildlife conservation division, Fairbanks, Alaska.

david-borchers/sampling documentation built on Sept. 17, 2022, 7:54 a.m.