Polydactyly and Limb Duplication Occurring Naturally in the Tiger Salamander, Ambystoma tigrinum.

Ontogenic delays in effects of nitrite exposure on tiger salamanders (Ambystoma tigrinum tigrinum) and wood frogs (Rana sylvatica).

Under certain conditions, nitrite can be present in freshwater systems in quantities that are toxic to the fauna. I exposed wood frog (Rana sylvatica) and eastern tiger salamander (Ambystoma tigrinum tigrinum) embryos and young tadpoles and larvae to elevated concentrations of nitrite in chronic toxicity tests: 0, 0.3, 0.6, 1.2, 2.1, 4.6, and 6.1 mg/L NO2-N, exposing individuals as both embryos...

Evidence for Introgression in the Endangered Sonora Tiger Salamander, Ambystoma tigrinum stebbinsi (Lowe)

Introduction of nonnative species and consequent genetic introgression of native taxa is a primary conservation concern, particularly for endangered species. Our ongoing molecular study of the endangered Sonora Tiger Salamander, Ambystoma tigrinum stebbinsi (Lowe), has uncovered evidence of introgression by the Barred Tiger Salamander, Ambystoma tigrinum mavortium. We conducted both mitochondri...

Susceptibility of the endangered California tiger salamander, Ambystoma californiense, to ranavirus infection.

Emerging infectious diseases are implicated in the declines and extinctions of amphibians worldwide. Ranaviruses in the family Iridoviridae are a global concern and have caused amphibian die-offs in wild populations in North America, Europe, South America, and in commercial populations in Asia and South America. The movement of amphibians for bait, food, pets, and research provides a route for ...

A Landscape Analysis of Gene Flow and Population Reductions in the Tiger Salamander (Ambystoma tigrinum) Across the Northern Range of Yellowstone National Park

Insights into the mating habits of the tiger salamander (Ambystoma tigrinum tigrinum) as revealed by genetic parentage analyses.

Among urodeles, ambystomatid salamanders are particularly amenable to genetic parentage analyses because they are explosive aggregate breeders that typically have large progeny arrays. Such analyses can lead to direct inferences about otherwise cryptic aspects of salamander natural history, including the rate of multiple mating, individual reproductive success, and the spatial distribution of c...