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Spatio-temporal structure of the communities of helminths in the digestive tract of Sciaena umbra L. 1758 (Teleostei)

Published online by Cambridge University Press:  06 April 2009

J. Holmes  and
P. Bartoli
J. Holmes
Affiliation:
Centre de Biologie et d’Ecologie Tropicale et Méditerranéenne, CNRS, URA No. 698, Université de Perpignan, 66860 Perpignan cédex, France Department of Zoology, University of Alberta, Edmonton, Alberta, Canada T6G 2E9
P. Bartoli
Affiliation:
Centre de Biologie et d’Ecologie Tropicale et Méditerranéenne, CNRS, URA No. 698, Université de Perpignan, 66860 Perpignan cédex, France Laboratoire de Biologie Marine et d’Ecologie du Benthos, Faculté des Sciences de Luminy — Case 901, 13288 Marseilles cédex 09, France
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Summary

The helminth community in the digestive tract of the sedentary predatory fish, Sciaena umbra, near the Scandola Nature Reserve, Corsica, consists of 5 species of digeneans. Anoiktostoma coronatum (in the rectum) and Metadena pauli (in the intestine) were found in almost all the fish, and in high numbers; they are considered core species. Distomum aloysiae, Pleorchis polyorchis (both in the intestine), and Stephanostomum bicoronatum (in the rectum) were relatively uncommon, usually found in small numbers, and are considered satellite species. The two core species were very abundant in June, when the size of their populations was strongly correlated with the size of the host fish. At this time, M. pauli was found mainly in the duodenum, but in high populations was spread throughout the intestine (s. strict.). Both species were much less abundant in October, their populations were less dependent on host size, and M. pauli was more limited to the anterior intestine. Pleorchis polyorchis and Distomum aloysiae were more frequent in October, were found predominately in fish with few M. pauli, and were found posterior to M. pauli, suggesting some interactions between these species. Stephano-stomum bicoronatum showed no seasonal patterns, and no apparent interactions with A. coronatum.

Keywords

community structurecompetitionDigeneadigestive tractmicrohabitat
Type
Research Article
Information
Parasitology , Volume 106 , Issue 5 , June 1993 , pp. 519 - 525
Copyright
Copyright © Cambridge University Press 1993

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