caribou {asbio}

Caribou count data

Description

Stratified random sampling was used to estimate the size of the Nelchina herd of Alaskan caribou (Rangifer tarandus) in February 1962 (Siniff and Skoog 1964). The total population of sample units (for which responses would be counts of caribou) consisted of 699 four mile^2 areas. This population was divided into six strata, and each of these was randomly sampled.

Usage

data(caribou)

Format

A data frame with 6 observations on the following 5 variables.

stratum

Strata; a factor with levels A B C D E F

N.h

Strata population size

n.h

Strata sample size

x.bar.h

Strata means

var.h

Strata variances

Source

Siniff, D. B., and R. O. Skoog (1964) Aerial censusing of caribou using stratified random sampling. Journal of Wildlife Management 28: 391-401.