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The amphibian chytrid fungus in Bavarian populations of Alytes obstetricans: past absence, current presence, and metamorph mortality


Böll, S; Tobler, U; Geiger, C C; Hansbauer, G; Schmidt, B R (2012). The amphibian chytrid fungus in Bavarian populations of Alytes obstetricans: past absence, current presence, and metamorph mortality. Amphibia Reptilia, 33(3-4):319-326.

Abstract

In three Bavarian populations of Alytes obstetricans that were studied for the occurrence of Batrachochytrium dendrobatidis, the pathogen was detected. This is the first account of chytridiomycosis in Bavaria, Germany. Infected tadpoles had low infection loads mostly of 101 to 102 genome equivalents. Under high-density rearing conditions in the laboratory mortality rates were high after metamorphosis. Some individuals, however, showed no infection with Bd, while others survived metamorphosis in spite of low Bd loads. A new approach was chosen to get historical data on Bd occurrence in one of these populations: skeletochronological phalanx cross sections of 248 individuals that had been collected in the late
1980s were used to analyse the epidermis for chytrid sporangia. No sporangia were detected, thus we conclude that this population was not affected by Bd in the past.

Abstract

In three Bavarian populations of Alytes obstetricans that were studied for the occurrence of Batrachochytrium dendrobatidis, the pathogen was detected. This is the first account of chytridiomycosis in Bavaria, Germany. Infected tadpoles had low infection loads mostly of 101 to 102 genome equivalents. Under high-density rearing conditions in the laboratory mortality rates were high after metamorphosis. Some individuals, however, showed no infection with Bd, while others survived metamorphosis in spite of low Bd loads. A new approach was chosen to get historical data on Bd occurrence in one of these populations: skeletochronological phalanx cross sections of 248 individuals that had been collected in the late
1980s were used to analyse the epidermis for chytrid sporangia. No sporangia were detected, thus we conclude that this population was not affected by Bd in the past.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Evolutionary Biology and Environmental Studies
Dewey Decimal Classification:570 Life sciences; biology
590 Animals (Zoology)
Uncontrolled Keywords:amphibian, Alytes, chytridiomycosis
Language:English
Date:2012
Deposited On:30 Nov 2012 13:46
Last Modified:05 Apr 2016 16:06
Publisher:Brill
Series Name:Amphibia Reptilia
ISSN:0173-5373
Publisher DOI:https://doi.org/10.1163/156853812X651856

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