Population Data Sets

Description

Example data sets for use in the MARSS-package User Guide. Some are logged and some unlogged population counts. See the details below on each data set.

The data sets are matrices with year in the first column and counts in other columns. Since MARSS functions require time to be across columns, these data matrices must be transposed before passing into MARSS functions.

Usage

data(graywhales)
data(grouse)
data(prairiechicken)
data(wilddogs)
data(kestrel)
data(okanaganRedds)
data(rockfish)
data(redstart)

Format

The data are supplied as a matrix with years in the first column and counts in the second (and higher) columns.

Source

• graywhales Gerber L. R., Master D. P. D. and Kareiva P. M. (1999) Gray whales and the value of monitoring data in implementing the U.S. Endangered Species Act. Conservation Biology, 13, 1215-1219.

• grouse Hays D. W., Tirhi M. J. and Stinson D. W. (1998) Washington state status report for the sharptailed grouse. Washington Department Fish and Wildlife, Olympia, WA. 57 pp.

• prairiechicken Peterson M. J. and Silvy N. J. (1996) Reproductive stages limiting productivity of the endangered Attwater's prairie chicken. Conservation Biology, 10, 1264-1276.

• wilddogs Ginsberg, J. R., Mace, G. M. and Albon, S. (1995). Local extinction in a small and declining population: Wild Dogs in the Serengeti. Proc. R. Soc. Lond. B, 262, 221-228.

• okanaganRedds A data set of Chinook salmon redd (egg nest) surveys. This data comes from the Okanagan River in Washington state, a major tributary of the Columbia River (headwaters in British Columbia). Unlogged.

• rockfish Logged catch per unit effort data for Puget Sound total total rockfish (mix of species) from a series of different types of surveys.

• kestrel Three time series of American kestrel logged abundance from adjacent Canadian provinces along a longitudinal gradient (British Columbia, Alberta, Saskatchewan). Data have been collected annually, corrected for changes in observer coverage and detectability, and logged.

• redstart 1966 to 1995 counts for American Redstart from the North American Breeding Bird Survey (BBS record number 0214332808636; Peterjohn 1994) used in Dennis et al. (2006). Peterjohn, B.G. 1994. The North American Breeding Bird Survey. Birding 26, 386–398. and Dennis et al. 2006. Estimating density dependence, process noise, and observation error. Ecological Monographs 76:323-341.

Examples

str(graywhales)
str(grouse)
str(prairiechicken)
str(wilddogs)
str(kestrel)
str(okanaganRedds)
str(rockfish)