LRH01 {caribou}

Leaf River Herd 2001 Data

Description

Population size of the Leaf River (Riviere aux Feuilles) herd (Quebec) from a postcalving survey in July 2001.

Usage

data(LRH01)

Format

17 by 2 numeric matrix, with the following columns:

xi

number of radio-collared animals in the detected (photographed) groups

gni

size of the detected groups

Details

During this survey, 120 collars were active.
23 collars (19%) were photographed among the 17 detected groups.

Note

The small sample size of this census was caused by technical and weather related problems in July 2001. This provided an opportunity to see the behaviour of the different models under low sampling regime.

Source

Couturier, S., Jean, D., Otto, R. and Rivard, S. (2004). Demography of the migratory tundra caribou (Rangifer tarandus) of the Nord-du-Quebec region and Labrador. Min. Ressources naturelles, Faune et Parcs, Quebec. 68 p. ISBN: 2-550-43725-X

Examples

petersen(LRH01, M=120)
abundance(LRH01, n=120, model="H")
abundance(LRH01, n=120, model="I")
abundance(LRH01, n=120, model="T", B=2)
# The threshold model with B >= 3 is equivalent
# to the homogeneity model for this data set
# because max(LRH01$xi)=2