By Steven J R Allain and Mark James Goodman, text taken directly from experiment.com
Backed by Brian Colin Eversham, Talita Bateman, Lindsay Stronge, and Clare Worden
About the project
Click here for comprehensive information and how to fund from experiment.com
We’re currently studying a population of the common midwife toad (Alytes obstetricans) in Cambridge, England. The species is non-native and our current goal is to screen the population for the amphibian chytrid fungus (Batrachochytrium dendrobatidis), which has been implemented in amphibian population declines worldwide. As an introduced species, the disease is one of the biggest threats to our native herpetofauna.
What is the context of this research?
This project has been ongoing for the past couple of years. In 2015, the first midwife toads were confirmed. Since then, we have continued to swab toads for the fungus, although only a small number of samples have been analysed. Currently we are working on producing a manuscript to be published in a peer-reviewed journal with our initial results. We hope to raise the funds to pay for the analysis of the swabs currently in cold storage and also allow us to continue the project into the next year or two.
What is the significance of this project?
The chytrid fungus has already caused the extinction of 200 amphibian species and threatens hundreds more around the globe. One of the main introduction routes for the disease is through the introduction of non-native species. The disease affects different species and populations differently and so infected animals may not show clinical signs of infection. This means that screening them by swabbing for the disease is the only way we’ll know whether or not they are infected.
What are the goals of the project?
We aim to establish whether or not, as a non-native species, the midwife toads we are studying are acting as a vector of the chytrid fungus. Through analysis we also wish to determine how prevalent the disease is, if it is present, and how we can mitigate the spread to local amphibians. We’ve been taking morphometric data of all of the toads we swab (including tadpoles) so that we can build a better idea of the population structure too. This, twinned with the results from the swabs, will allow us to see which individuals were infected, the location they were found and their age-class. Using this information we should be able to track transmission pathways (if the disease is present).
Chytrid Swab Analysis$1,500
The only real cost we have is the analysis of our samples which cost ~$30 per sample. This analysis is a qPCR test which tests the samples for chytrid fungus DNA, which will be carried out at the Institute of Zoology, London Zoo. We estimate the population to be between 50 and 100 individuals, we’d like to sample at least half of these if possible. The budget will allow us to pay for the analysis of approximately 50 samples and will only be used on analysis.