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Rose, J.P., and Halstead, B.J., 2020, Code and data files to construct an Integral Projection Model for Giant Gartersnakes (Thamnophis gigas) in the Sacramento Valley, California, 1995-2017: U.S. Geological Survey data release,


This dataset includes data on the growth, fecundity, and survival of Giant Gartersnakes (Thamnophis gigas) in the Sacramento Valley of California from 1995-2017. These data support the following publication: Rose, J.P., Ersan, J.S., Wylie, G.D., Casazza, M.L. and Halstead, B.J., 2019. Demographic factors affecting population growth in giant gartersnakes. The Journal of Wildlife Management, 83(7), pp.1540-1551.


Point of Contact :
Jonathan P Rose
Originator :
Jonathan P Rose, Brian J Halstead
Metadata Contact :
Jonathan P Rose
USGS Mission Area :
SDC Data Owner :
Western Ecological Research Center
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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asymptotic_survival_coefficients_mcmc.R 5.03 MB
CMR_survival_SVL_vector.R 11.86 KB
empirical_size_frequency_data.R 1.06 KB
fecundity_mcmc.R 396.62 KB
fecundity_raw_data.R 6.61 KB
growth_data_females_1_year.R 3.31 KB
growth_mcmc.R 1.15 MB
linear_survival_coefficients_mcmc.R 536.08 KB
predicted_size_linear.R 62.21 KB
probability_gravid_mcmc.R 2.61 MB
quadratic_survival_coefficients_mcmc.R 7.81 MB
reproductive_status_raw_data.R 940 Bytes


These data were collected to better understand the demography of Giant Gartersnakes in the Sacramento Valley. The Integral Projection Model was constructed to identify which life-stage transitions (e.g., survival, fecundity) have the greatest influence of the growth rate of Giant Gartersnake populations.

Additional Information


Type Scheme Key
DOI doi:10.5066/P9IBSR18

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