| 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)