Code to analyze static occupancy of northwestern pond turtles (Actinemys marmorata) in timberland streams in the interior foothills of northern California
April 23, 2024
The purpose of this study was to evaluate the distribution of northwestern pond turtles (Actinemys marmorata) and invasive American bullfrogs (Lithobates catesbeianus) in private timberland streams of interior northern California, USA. Fieldwork for the study occurred in 2021-2022 in Lassen, Plumas, Shasta, Tehama, and Trinity counties, California, and involved visual encounter surveys and sampling for environmental DNA. We used the two detection methods as independent samples to estimate the probability of occurrence of northwestern pond turtles, and compared detection probabilities of the detection methods to one another. We used indicator variables to select variables for estimating detection and occurrence probabilities. The code presented herein reproduces the static occupancy analysis used in the study.
Citation Information
Publication Year | 2024 |
---|---|
Title | Code to analyze static occupancy of northwestern pond turtles (Actinemys marmorata) in timberland streams in the interior foothills of northern California |
DOI | 10.5066/P9N3I4MK |
Authors | Brian J Halstead, Patrick M Kleeman, Jonathan P Rose |
Product Type | Software Release |
Record Source | USGS Asset Identifier Service (AIS) |
USGS Organization | Western Ecological Research Center - Headquarters |
Related
Comparison of two methods to detect the northwestern pond turtle (Actinemys marmorata) and the invasive American bullfrog (Lithobates catesbeianus) in interior northern California
Knowledge about the distributions of species and the variables influencing their occurrence is important for their management and conservation, but factors affecting occurrence can vary across the range of a species. Northwestern pond turtles (Actinemys marmorata) are widespread generalist turtles, but are nonetheless of conservation concern throughout their range. To better understand...
Authors
Brian J. Halstead, Patrick M. Kleeman, Caren S. Goldberg, Jonathan P. Rose
Brian Halstead
Research Wildlife Biologist
Research Wildlife Biologist
Email
Phone
Patrick M Kleeman
Supervisory Ecologist
Supervisory Ecologist
Email
Phone
Related
Comparison of two methods to detect the northwestern pond turtle (Actinemys marmorata) and the invasive American bullfrog (Lithobates catesbeianus) in interior northern California
Knowledge about the distributions of species and the variables influencing their occurrence is important for their management and conservation, but factors affecting occurrence can vary across the range of a species. Northwestern pond turtles (Actinemys marmorata) are widespread generalist turtles, but are nonetheless of conservation concern throughout their range. To better understand...
Authors
Brian J. Halstead, Patrick M. Kleeman, Caren S. Goldberg, Jonathan P. Rose
Brian Halstead
Research Wildlife Biologist
Research Wildlife Biologist
Email
Phone
Patrick M Kleeman
Supervisory Ecologist
Supervisory Ecologist
Email
Phone