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Intra- and interspecific pairing of rediae and sporocysts of five species of digenetic trematodes

Published online by Cambridge University Press:  05 June 2009

A. Reddy  and
B. Fried
A. Reddy
Affiliation:
Department of Biology, Lafayette College, Easton, Pennsylvania 18042, USA
B. Fried*
Affiliation:
Department of Biology, Lafayette College, Easton, Pennsylvania 18042, USA
*
*Author for correspondence.
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Abstract

In vitro pairing studies on rediae of Echinostoma trivolvis, E. caproni, Zygocotyle lunata, Ribeiroia sp. and sporocysts from a species of armatae cercaria were undertaken at 22°C in a Petri dish bioassay containing an agar substratum and a Locke's 1:1 overlay. Pairing was arbitrarily defined as larvae in contact or within 1 mm of each other. Intraspecific and interspecific pairing occurred in the bioassay using several larval combinations initially placed 5 or 10 mm apart. Intraspecific pairing occurred with the rediae of Ribeiroia sp. and interspecific pairing was seen between E. trivolvis or E. caproni and Ribeiroia sp. A previous study documented intraspecific and interspecific pairing between rediae of E. trivolvis and E. caproni. Armatae sporocysts did not pair intraspecifically or interspecifically when matched with either E. caproni or E. trivolvis rediae. Intraspecific pairing of Z. lunata or interspecific pairing between Z. lunata rediae and echinostome rediae did not occur. The significance of redial pairing remains unclear.

Type
Research Note
Information
Journal of Helminthology , Volume 71 , Issue 3 , September 1997 , pp. 263 - 264
Copyright
Copyright © Cambridge University Press 1997

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References

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Reddy, A. & Fried, B. (1996) In vitro studies on intraspecific and interspecific chemical communication in daughter rediae of Echinostoma trivolvis and E. caproni. International journal for Parasitology 26, 1081–1085.CrossRefGoogle ScholarPubMed