Susceptibility of frog (Rana temporaria) and toad (Bufo bufo) eggs to invasion by Saprolegnia

Robinson, J. and Griffiths, R.A. and Jeffries, P. (2003) Susceptibility of frog (Rana temporaria) and toad (Bufo bufo) eggs to invasion by Saprolegnia. Amphibia-Reptilia, 24 (3). pp. 261-268. ISSN 0173-5373. (Access to this publication is restricted)

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http://dx.doi.org/10.1163/156853803322440745

Abstract

Infections of amphibian eggs sometimes cause catastrophic losses of reproductive effort, but susceptibility to infection in different species is poorly understood. Using laboratory trials we showed that direct hyphal invasion of adjacent eggs by Saprolegnia caused a higher incidence of infection than invasion by zoospores. Moreover, we observed that dead eggs were much more readily colonized than live eggs when challenged with zoospores from two strains of Saprolegnia. The two strains were equally effective in causing infections of Rana teinporaria eggs, but differed in their ability to infect eggs of Bufo bufo. In live R. temporaria eggs, early stages (pre-tailbud) were more frequently infected by hyphal invasion than later stages by the same strains, suggesting that susceptibility to infection decreases as development proceeds.

Item Type: Article
Uncontrolled keywords: emerging infectious dieseases; epidemic disease; population declines; amphibians; Australia, calamita, fungi
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
G Geography. Anthropology. Recreation > GN Anthropology
Divisions: Faculties > Social Sciences > School of Anthropology and Conservation > DICE (Durrell Institute of Conservation and Ecology)
Depositing User: C.G.W.G. van-de-Benderskum
Date Deposited: 08 Sep 2008 14:06
Last Modified: 06 Sep 2011 00:11
Resource URI: http://kar.kent.ac.uk/id/eprint/8573 (The current URI for this page, for reference purposes)
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