endangered species conservation

Research Project | 2016

California Tiger Salamander

The California tiger salamander lives in the vernal pool grasslands of the Central Valley and inner-coast ranges. But it’s been declining in population ever since the non-native barred tiger salamander was intentionally introduced to its range, resulting in massive hybridization. In this battle of the genes, the native is losing ground. In partnerships with the US Fish and Wildlife Service, Bureau of Land Management, and California Department of Fish and Wildlife, researchers at the La Kretz Center are developing a framework for evaluating hybrid protection and strategies to manage this problem by using evolutionary biology to select for more native salamanders.

Related Publications

Population genetic and field-ecological analyses return similar estimates of dispersal over space and time in an endangered amphibian

Wang, I.J. and H.B. Shaffer

Published Work | 2017 | Evolutionary Applications 10:630-639

Determinants of size at metamorphosis in an endangered amphibian and their projected effects on population stability

C.A. Searcy, H. Snass, and H. B. Shaffer

Published Work | 2015 | Oikos 124:724-731.

Delayed life history effects, multilevel selection, and evolutionary trade-offs in the California tiger salamander

C. A. Searcy, L. N. Gray, P. C. Trenham and H. B. Shaffer

Published Work | 2014 | Ecology 95:68-77

Effects of tail-clipping on survivorship and growth of larval salamanders

R.L. Polich, C. A. Searcy and H. B. Shaffer

Published Work | 2013 | J. Wildlife Management 77:1420-1425

Short hydroperiod decreases fitness of nonnative salamanders in California

J. R. Johnson, M. E. Ryan, S. J. Micheletti, and H. B. Shaffer

Published Work | 2013 | Animal Conservation 16:556-565

Microhabitat use and migration distance of an endangered grassland amphibian

C. A. Searcy, Gabbai-Saldate, E., and H. B Shaffer

Published Work | 2013 | Biological Conservation 158:80-87

Lethal effects of water quality on threatened California salamanders but not on co-occurring hybrid salamanders

M. E. Ryan, J. R. Johnson, B. M. Fitzpatrick, L. J. Lowenstine, A. M. Picco and H. B. Shaffer

Published Work | 2013 | Conservation Biology 27:95-102