Toxicity of Cadmium, Copper, and Zinc to the Threatened Chiricahua Leopard Frog (Lithobates [Rana] chiricahuensis)

Bulletin of Environmental Contamination and Toxicology
Robin D Calfee, Edward E Little

Abstract

The Chiricahua leopard frog (Lithobates chiricahuensis) is in decline throughout the western United States, and is particularly sensitive to physical, chemical and biotic changes in their habitat. Acute toxicity tests revealed that among the metals detected in Chiricahua leopard frog habitat, copper was toxic at concentrations lower than those observed in the environment. Developing tadpoles were chronically exposed for 60 days to cadmium, copper and zinc because of the potential for long term exposure to these metals during early development. Cadmium was toxic, but at concentrations above observed environmental levels. Copper was especially toxic to this species at concentrations of about 10% of concentrations observed in their habitats. The onset of toxicity occurred within a few days of exposure, thus pulsed exposures from rain events could potentially be acutely toxic to tadpoles of this species. Zinc did not appear to have a negative impact during the acute or chronic exposures.

References

Jan 1, 1991·Toxicology Letters·L D ZettergrenJ G Zettergren
Apr 1, 1995·Risk Analysis : an Official Publication of the Society for Risk Analysis·K SunA P Basu

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Citations

Mar 23, 2021·Environmental Toxicology and Chemistry·Ali AzizishiraziGregory G Pyle
Jan 28, 2022·Bulletin of Environmental Contamination and Toxicology·Yafeng LiuZhengqiu Fan

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