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Effect of water temperature on the ability of Diplostomum spathaceum miracidia to establish in lymnaeid snails

Published online by Cambridge University Press:  05 June 2009

G. D. B. Waadu  and
L. H. Chappell
G. D. B. Waadu
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB9 2TN, UK
L. H. Chappell*
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB9 2TN, UK
*
†Author to whom correspondence should be addressed.
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Abstract

The effects of water temperature on the ability of Diplostomum spathaceum miracida to infect and establish patent infections in Lymnaea peregra and L. stagnalis were investigated. Snails were infected over a range of temperatures (6–20°C) and kept thereafter at 20°C or were infected at 20°C and kept at either 14, 20, or 25°C. Infection success was determined after 8 weeks by either observing cercarial shedding or examining snail viscera for sporocysts. The establishment of miracidia declined at lower water temperatures despite maintenance for 8 weeks at 20°C while exposure of snails to miracidia at 20°C and maintenance at different temperatures had little apparent effect. Infection success under these conditions was related more to the numbers of miracidia to which the snails were exposed. However, under this latter experimental regime, the time taken for the infection to become patent clearly depended upon maintenance temperature.

Keywords

Diplostomum spathaceumLymnaeamiracidiawater temperatureinfectivityTrematoda
Type
Research Papers
Information
Journal of Helminthology , Volume 65 , Issue 3 , September 1991 , pp. 179 - 185
Copyright
Copyright © Cambridge University Press 1991

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