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Abstract Detail


MSA - Ecology/Pathology

Dolan, Thomas E. [1], Dolan, Rebecca W. [1], Frasca, Joey [1].

Genetic variation among Saprolegnia ferax isolates infecting egg masses of the salamander Ambystoma texanum.

Egg masses of the small-mouth salamander (Ambystoma texanum) collected from vernal pools in Eagle Creek Park (Indianapolis, IN, USA) over the past four breeding seasons are routinely infected with species of the “water mold” genera Achlya and Saprolegnia, most commonly with Saprolegnia ferax. For the last four years, we have collected S. ferax isolates from the free water column and from A. texanum eggs for genetic characterization using allozyme analysis. One electrotype occurs at a significantly higher frequency on eggs. While allozyme profiles do not characterize a unique infectious strain of S. ferax, there does appear to be an aggressive strain associated with 72% of egg mass infections. We are examining the usefulness of allozyme markers as a means of detecting possible genetic structuring among populations of S. ferax inhabiting the breeding pools of A. texanum.


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1 - Butler University, Department of Biological Sciences, 4600 Sunset Ave, Indianapolis, Indiana, 46208, USA

Keywords:
Saprolegnia ferax
Ambystoma texanum
Genetic variation.

Presentation Type: Poster:Posters for Topics
Session: P2
Location: Event Tent/Cliff Lodge
Date: Tuesday, July 28th, 2009
Time: 5:30 PM
Number: P2EP040
Abstract ID:686


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