Code to analyze survival data for Giant gatersnakes, Thamnophis gigas in Sacramento County, California from 2018 to 2021

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.