ttdPeregrine {AHMbook}R Documentation

Time-to-detection data for peregrines from the French Jura mountains

Description

Between 7 and 9 March 2015, 38 breeding cliffs were visited up to 3 times to survey for Peregrine Falcons (Falco peregrinus). Observation duration varied from 3 to 95 minutes. The time to detection was recorded for each bird seen. If no birds were seen, the time was entered as NA.

Usage

data("ttdPeregrine")

Format

A data frame with 70 rows and the following columns:

Date

a factor with 3 levels giving the date

DayNumber

the number of the day: 1, 2, or 3

SiteNumber

identification number of the site

Start.hour, Start.minute

the time of starting the search

End.hour, End.minute

the time of ending the search

MinOfDay

the time of the start of the search, minutes after 06:00

Tmax

the duration of the search, in minutes

ttd

the time to detection, minutes; NA if no birds were seen during the search

sex

the sex of the birds seen; NA if no birds were seen

Source

Based on the field work of one of the authors.

References

Kéry, M. & Royle, J.A. (2016) Applied Hierarchical Modeling in Ecology AHM1 - 10.12.

Examples

# Using the built-in data set instead of the TXT file for the example in Section
#  10.12 of the book is easy, as the format is the same as the file.

?ttdPeregrine  # check the description of the data
data(ttdPeregrine)
# Instead of data <- read.table("ttdPeregrine.txt", header = TRUE, sep = "\t") do:
data <- ttdPeregrine

# Then continue with the rest of the analysis on p.618

[Package AHMbook version 0.2.3 Index]