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Pesticide Accumulation in Sierra Nevada Frogs

By Guest PostJuly 27, 2013Environment, Natureagriculture, amphibian ecologist, byproduct, california, central valley, chytrid fungus, dde, environmental problems, fungicides, herbicide, hydrologist, kelly smalling, lake tahoe, lassen, mark sogge, mountain habitats, pacific chorus frog, patrick kleeman, pesticide accumulation, pesticide ddt, pseudacris regilla, pyraclostrobin, sediment samples, sierra nevada, sierra nevada frogs, simazine, tebuconazole, U.S. Geological Survey, usgs, volcanic national park, yosemite national park

SACRAMENTO, Calif. — A study on frogs in remote Sierra Nevada mountain habitats including Yosemite National Park and Giant Sequoia National Monument, detected concentrations of pesticides in frog tissue that potentially came from California’s Central Valley sources.

“Our results show that current-use pesticides, particularly fungicides, are accumulating in the bodies of Pacific chorus frogs in the Sierra Nevada,” says Kelly Smalling, a research hydrologist with the U.S. Geological Survey and lead author of the study. “This is the first time we’ve detected many of these compounds, including fungicides, in the Sierra Nevada. The data generated by this study support past research on the potential of pesticides to be transported by wind or rain from the Central Valley to the Sierras.” (more…)

Global Bullfrog Trade Spreads Deadly Amphibian Fungus Worldwide

By Guest PostAugust 14, 2012Natureamphibian fungus, anna peterson, asian food shop, atlantic forest, batrachochytrium dendrobatidis, bd, bd brazil, bd gpl, brazil, brazilian bullfrog, brazilian strain, bullfrog trade, chytrid fungus, dna sequencing, frog farm, frogs, global panzootic lineage, global trade, Japan, lisa schloegel, luis felipe toledo, marcio hipolito, maria lee, michigan bullfrog, north american bullfrog, peter daszak, salamanders, skin, south america, taiwan, timothy james, toads, united states, university of michigan, valerie mckenzie

ANN ARBOR, Mich.— The global trade in bullfrogs, which are farmed as a food source in South America and elsewhere, is spreading a deadly fungus that is contributing to the decline of amphibians worldwide, according to a University of Michigan biologist and his colleagues.

Amphibian populations are declining worldwide at an alarming rate, and the spread of the deadly chytrid fungus is believed to be a contributing factor. The fungus infects the skin of frogs, toads and salamanders.

In a study to be published in an upcoming edition of the journal Molecular Ecology, University of Michigan evolutionary biologist Timothy James and his colleagues examine the role of bullfrog farming in spreading the chytrid fungus between the forests and frog farms of Brazil and then to the United States and Japan. (more…)

Blood Samples Show Deadly Frog Fungus at Work in the Wild

By Guest PostApril 27, 2012Naturechytrid fungus, deadly dehydration, electrolyte balance, frog population, fungal infection, vance vredenburg, wild frogs, wildlife diseases

Pathogen leads to dehydration, other ill effects

The fungal infection that killed a record number of amphibians worldwide leads to deadly dehydration in frogs in the wild, according to results of a new study. (more…)

Tag Archives: chytrid fungus

Pesticide Accumulation in Sierra Nevada Frogs

Global Bullfrog Trade Spreads Deadly Amphibian Fungus Worldwide

Blood Samples Show Deadly Frog Fungus at Work in the Wild