Asian salamanders and newts that could be harboring the fungus are traded in large numbers around the world.
During the infection experiments, they found that
some Asian salamanders developed symptoms and then recovered, whereas others were completely resistant.
Studies of tiger salamanders and
the Asian salamander Hynobius retardatus have found that cannibal morphs develop when larvae are crowded in large numbers and are mostly unrelated (same species but from different parents).
Not exact matches
The situation is alarming: The invasive
Asian fungus has recently led to mass mortality of fire
salamanders in the Netherlands, Belgium and Germany.
Because
salamanders in Europe have not evolved along with the disease, they are much more vulnerable to it than their
Asian relatives.
And although American
salamanders, the most diverse population in the world, have been faring well in comparison, scientists are now bracing for an extraordinary threat: an
Asian chytrid fungus called Batrachochytrium salamandrivorans, or Bsal.
When an
Asian fungus that was already devastating European
salamander and newt populations was tested on a keystone American species, the eastern newt, there was 100 - percent mortality.