Code to analyze survival data for Giant gatersnakes, Thamnophis gigas in Sacramento County, California from 2018 to 2021
February 14, 2023
The purpose of this study was to estimate the survival of giant gartersnakes (Thamnophis gigas) prior to and following translocation, as well as to evaluate the use of captive rearing as a conservation tool for giant gartersnakes. We used Kaplan-Meier and Cox Proportional Hazards models to estimate survival rates and estimate the effects of group identity (marsh donor, rice donor, and translocation recipient), translocation status, size, surface activity, and movement rate on survival of adults, and these variables plus sex and size on survival of captive-reared juveniles. This code reproduces the survival analyses used in the study, as well as tables and figures of results.
Citation Information
| Publication Year | 2023 |
|---|---|
| Title | Code to analyze survival data for Giant gatersnakes, Thamnophis gigas in Sacramento County, California from 2018 to 2021 |
| DOI | 10.5066/P9I448M2 |
| Authors | Allison M Essert, Brian D Todd, Brian J Halstead |
| Product Type | Software Release |
| Record Source | USGS Digital Object Identifier Catalog |
| USGS Organization | Western Ecological Research Center - Headquarters |
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Survival and establishment of captive-reared and translocated giant gartersnakes after release
Many imperiled species face increasing extinction risk that requires interventional management like translocation or captive rearing. The use of translocations to successfully restore or create populations requires that animals survive at recipient sites, information that is often lacking for imperiled species and that can be risky to acquire if not obtained before a species has dwindled in number
Authors
Allison M. Nguyen, Brian D Todd, Brian J. Halstead
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Survival and establishment of captive-reared and translocated giant gartersnakes after release
Many imperiled species face increasing extinction risk that requires interventional management like translocation or captive rearing. The use of translocations to successfully restore or create populations requires that animals survive at recipient sites, information that is often lacking for imperiled species and that can be risky to acquire if not obtained before a species has dwindled in numberAuthorsAllison M. Nguyen, Brian D Todd, Brian J. Halstead - Connect