EcoHealth

, Volume 10, Issue 1, pp 90–98

Fitness Consequences of Infection by Batrachochytrium dendrobatidis in Northern Leopard Frogs (Lithobates pipiens)

Authors

    • Department of Ecology and Evolutionary BiologyTulane University
  • Laura A Brannelly
    • School of Tropical MedicineJames Cook University
  • Matthew J. Robak
    • Department of Ecology and Evolutionary BiologyTulane University
  • Layla Freeborn
    • Department of Ecology and Evolutionary BiologyTulane University
  • Simon P. Lailvaux
    • Department of BiologyUniversity of New Orleans
  • Corinne L. Richards-Zawacki
    • Department of Ecology and Evolutionary BiologyTulane University
Original Contribution

DOI: 10.1007/s10393-013-0833-7

Cite this article as:
Chatfield, M.W.H., Brannelly, L.A., Robak, M.J. et al. EcoHealth (2013) 10: 90. doi:10.1007/s10393-013-0833-7

Abstract

The amphibian chytrid fungus, Batrachochytrium dendrobatidis (Bd), has been linked to amphibian declines and extinctions worldwide. The pathogen has been found on amphibians throughout eastern North America, but has not been associated with mass die-offs in this region. In this study, we conducted laboratory experiments on the effects of Bd infection in a putative carrier species, Lithobates pipiens, using two estimators of fitness: jumping performance and testes morphology. Over the 8-week study period, peak acceleration during jumping was not significantly different between infected and uninfected animals. Peak velocity, however, was significantly lower for infected animals after 8 weeks. Two measures of sperm production, germinal epithelium depth, and maximum spermatic cyst diameter, showed no difference between infected and uninfected animals. The width, but not length, of testes of infected animals was significantly greater than in uninfected animals. This study is the first to show effects on whole-organism performance of Bd infection in post-metamorphic amphibians, and may have important long-term, evolutionary implications for amphibian populations co-existing with Bd infection.

Keywords

Batrachochytrium dendrobatidischytrid fungusfitnessnorthern leopard frogLithobates pipienswhole-organism performance

Copyright information

© International Association for Ecology and Health 2013