Chytridiomycosis in Crawfish Frogs: Understanding Infection Patterns
Author Information
Author(s): Vanessa C. Kinney, Jennifer L. Heemeyer, Allan P. Pessier, Michael J. Lannoo
Primary Institution: Indiana State University
Hypothesis
Is there a life history pattern or a seasonal pattern to infection by the chytrid fungus Batrachochytrium dendrobatidis in Crawfish Frogs?
Conclusion
Crawfish Frogs experience significant increases in chytrid infection rates during breeding seasons, with some individuals developing chytridiomycosis and dying.
Supporting Evidence
- 53% of Crawfish Frog breeding adults tested positive for Bd in at least one sample.
- 12% of emigrating Crawfish Frogs developed chytridiomycosis and died.
- All 25 adult frogs sampled while occupying upland crayfish burrows during the summer tested Bd negative.
- Zoospore equivalents ranged from 0.8 to 24,436, with high values correlating with mortality.
Takeaway
Crawfish Frogs can get sick from a fungus that affects their skin, especially when they are breeding, and some of them die from it.
Methodology
The study involved sampling Crawfish Frogs for the presence of Bd over two years, analyzing swabs using PCR techniques.
Potential Biases
The study may have underreported Bd infections due to the secretive nature of Crawfish Frogs.
Limitations
Sample sizes for summer upland-dwelling Crawfish Frogs were small compared to breeding adults and postmetamorphic juveniles.
Participant Demographics
Crawfish Frogs (Lithobates areolatus) from Indiana wetlands.
Statistical Information
P-Value
0.01
Statistical Significance
p=0.01
Digital Object Identifier (DOI)
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