A Frogs Are Green reader alerted us to a recent Dot Earth (New York Times) blog post by Andrew C. Revkin, “Genetic Study Finds Bullfrog Trade is Prime Pathway For Devastating Amphibian Fungus.”
University of Michigan mycologist Tim James and colleagues conducted a genetic analysis and have found that the global trade of live bullfrogs is helping to spread the deadly chytrid fungus, which has devastated worldwide amphibian populations. The results were published in the journal Molecular Ecology.
As Revkin notes, it isn’t clear why the fungus is devastating to amphibians in some areas, but seems to be harmless to those in other areas. For example, although there are deadly strains in the Northeast, there are no chytrid-related declines reported. Environmental conditions or other issues might account for this.
The researchers examined 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. They collected and analyzed bullfrogs sold at Asian food shops in seven U.S. cities and found that 41 percent of the frogs were infected with chytrid fungus, which is harmless to humans. Frogs in these shops are imported live primarily from farms in Taiwan, Brazil and Ecuador and sold as food for their legs.
“A lot of the movement of this fungus is related to the live food trade, which is something we should probably stop doing,” James said. “We don’t need to have millions of live frogs being shipped from foreign countries into the United States.”
For more information: Press release from the University of Michigan