Well, this is another one for the books. This article is merited with the “I forgot to tell how it happens” award. This award should be placed right next to the Negligence and Misinforming the Reader awards. More stories for the grandkids, I guess.
I suggest you read the article before moving forward.
“The scientists found no recorded cases of the extinction of a frog species caused by collection for food. However, given the growing importance of aquaculture to supply frog legs to global markets, the team stresses that the risk of disease spread through poorly regulated amphibian trade is probably an even greater risk to amphibian biodiversity than the direct population effects of overharvesting.”
Onto the story. This research has been in the works for years yet none of the articles I researched seem to give reasons on how, just conjectures. The article simply implies that poorly regulated amphibian trade markets is a greater risk to amphibian populations than overharvesting because of this fungal disease that I guess is being spread through what? Amphibians being farmed and harvested in areas that are not separate from the local ecosystem? If that’s the case then it’s no wonder we have rogue fungal diseases harmful to amphibians running rampage. What would happen if we didn’t domesticate our livestock and hold them to be raised and slaughtered in an “isolated” ecosystem? I don’t know? wide-spread disease for livestock and other animals living in the surrounding environment? We’ve already noticed just some of the effects our lack of discretion can cause, when it comes to dumping in a natural environment.
Here’s some research magic. Wikipedia-ed even.
“Bullfrogs (Rana catesbiana), also widely distributed, are also thought to be carriers of the disease due to their inherent low susceptibility to Bd infection.[14][15] The bullfrog often escapes captivity and can establish feral populations where it may introduce the disease to new areas.[6] It has also been shown that Bd can survive and grow in moist soil and on bird feathers, suggesting that Bd may also be spread in the environment by birds and transportation of soils.[16] Infections have been linked to mass mortalities of amphibians in North America, South America, Central America, Europe and Australia.[17][18][19] Bd has been implicated in the extinction of the sharp-snouted day frog (Taudactylus acutirostris) in Australia.[20]“
Even after reading that excerpt which is well researched and cited, one will still find a lack of certainty. I would think it most common that bullfrogs are the primary amphibian in this case, what with their delectable appendages. This being assumed, We still have inconclusive evidence. Simply stating that bullfrogs often escape captivity which results in feral populations is indicative of nothing with the exception that humans are still the cause.