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High diversity of metazoan parasites in carp gudgeons (Eleotridae: Hypseleotris spp.) from Eastern Australia

Published online by Cambridge University Press:  05 May 2020

E.C. Rochat*
Affiliation:
Natural History Museum of Geneva, Malagnou Road 1, 1208Geneva, Switzerland
I. Blasco-Costa
Affiliation:
Natural History Museum of Geneva, Malagnou Road 1, 1208Geneva, Switzerland Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Langnes, PO Box 6050, 9037Tromsø, Norway
T. Scholz
Affiliation:
Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05České Budějovice, Czech Republic
P.J. Unmack
Affiliation:
Centre for Applied Water Science, Institute for Applied Ecology, University of Canberra, ACT, Canberra, 2601, Australia
*
Author for correspondence: E.C. Rochat, E-mail: eloise.rochat@gmail.com

Abstract

Knowledge of the parasite fauna of Australian freshwater fish is fragmentary and incomplete. An understanding of fish hosts and their associated parasites is vital for the successful management of aquatic ecosystems. In this study, we surveyed the parasite fauna of carp gudgeons (Hypseleotris spp.), a complex of species of Australian freshwater fishes, using morphology and molecular data for the 18S and 28S ribosomal RNA genes. We examined 137 individuals of three different taxa in the carp gudgeon species complex and found 16 parasitic taxa of the Digenea, Cestoda, Nematoda and Arthropoda (five adults and 11 larvae). Eleven parasites are reported for the first time from the carp gudgeons (Pseudodactylogyrus sp., Gyrodactylus sp., Clinostomum sp., Paradilepis patriciae, P. cf. kempi, two unidentified species of Paradilepis, Dendrouterina sp., Parvitaenia sp., two lineages of Cyclophyllidea gen. sp., Procamallanus sp., larvae of a spirurine nematode and Lernaea sp.), in addition to Apatemon cf. hypseleotris Negm-Eldin & Davies, 2001 and the invasive tapeworm Schyzocotyle acheilognathi (Yamaguti, 1934), which were previously reported from these fish hosts. Parasite species richness was double in Lake's and Midgley's carp gudgeons relative to western carp gudgeon. These findings highlight the key role of carp gudgeons as intermediate hosts for multiple parasites with complex life cycles using native birds as definitive hosts and the usefulness of DNA data for the identification of parasite larvae.

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Type
Research Paper
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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