duskySalamanders {AHMbook}R Documentation

Age-classified counts of dusky salamanders from two mid-Atlantic states in the USA

Description

Northern dusky salamanders (Desmognathus fuscus) were sampled in 12 headwater streams in Maryland and the District of Columbia, USA, annually in June and July from 2005 to 2012. Most streams were sampled at two locations separated by at least 100 m along the stream reach for a total of 21 survey locations. At each location, an observer walked two 15-m transects along the stream-bed and turned cover objects, 6 cm in the water and on the bank within 2 m of the stream. Individuals < 35mm snout-to-vent length were classed as juveniles, including both first-year and second-year juveniles. The data are counts of adults and juveniles.

Usage

data("duskySalamanders")

Format

duskySalamanders is four-dimensional (21 x 7 x 2 x 2) array of counts, with dimensions:

site

a numerical site identifier.

year

the year of the survey, 2005 to 2012.

age

Juveniles or Adults.

survey

June or July.

Source

Evan Grant and colleagues.

References

Zipkin, E.F. et al (2014) Modeling structured population dynamics using data from unmarked individuals, Ecology, 95(1) 22-29.

Kéry, M. & Royle, J.A. (2021) Applied Hierarchical Modeling in Ecology AHM2 - 2.9.2

Examples

data(duskySalamanders)
str(duskySalamanders)

[Package AHMbook version 0.2.3 Index]