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Association between an ectoparasitic copepod (Caligus sp.) and the monogenean Udonella cf. caligorum Johnston 1835 on a catfish population

Published online by Cambridge University Press:  02 March 2017

D. Fogel ,
J.L. Fuentes ,
L.M. Soto  and
C. López
D. Fogel
Affiliation:
Chemey School of Marine Sciences, Department of Marine Biology, University of Haifa, Israel
J.L. Fuentes
Affiliation:
Instituto de Investigaciones Científicas, Universidad de Oriente, Nueva Esparta, Venezuela
L.M. Soto
Affiliation:
Escuela Superior Politécnica del Litoral, ESPOL, Facultad de Ciencias de la Vida, Guayaquil, Ecuador
C. López*
Affiliation:
Escuela Superior Politécnica del Litoral, ESPOL, Facultad de Ciencias de la Vida, Guayaquil, Ecuador
*
*E-mail: cllopez@espol.edu.ec
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Abstract

We analysed the association between a monogenean (Udonella cf. caligorum Johnston 1835) and its copepod host (Caligus sp.) living on a wild population of Arius herzbergii Bloch, 1794 in a north-eastern coastal lagoon from Venezuela. This study characterized infestation levels and analysed the effects of monogeneans on the fecundity and hatching success of the copepod host, as well as damage to its egg capsules and genital complex. A total of 218 Caligus specimens were analysed (94 males, 110 females and 14 immature stages) in which a total of 1017 monogeneans were found. These included 311 mature stages and 706 egg capsules. Monogenean stages were found attached to the cephalothorax, abdomen, genital complex and egg capsules of the copepods. No significant differences were found in fecundity and egg hatching when infested and non-infested ovigerous females were compared. No damage was observed on egg capsules or genital areas of infested ovigerous females. Our results suggest that this association, at the level of prevalence and intensity observed, is closer to commensalism than parasitism. The importance of considering that the nature of interaction is dynamic and changing with environmental conditions and time scale is highlighted.

Type
Short Communications
Information
Journal of Helminthology , Volume 92 , Issue 2 , March 2018 , pp. 250 - 253
Copyright
Copyright © Cambridge University Press 2017 

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