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Acta Parasitologica

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Volume 60, Issue 3 (Sep 2015)

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Eye fluke infection status in Baltic cod, Gadus morhua, after three decades and their use as ecological indicators

Foojan Mehrdana
  • Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
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/ Moonika H. Marana
  • Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
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/ Jakob Skov
  • Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
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/ Qusay Z.M. Bahlool
  • Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
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/ Diana Sindberg
  • Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
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/ Mai Mundeling
  • Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
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/ Bettina C. Overgaard
  • Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
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/ Per W. Kania
  • Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
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/ Kurt Buchmann
  • Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark
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Published Online: 2015-06-16 | DOI: https://doi.org/10.1515/ap-2015-0058

Abstract

Eye flukes of the genus Diplostomum were recorded with a prevalence of 7.4% and a mean intensity of 11.9 (range 1-75) parasites per fish in eye lenses of a total of 188 Atlantic cod, Gadus morhua, sampled in the Southeastern Baltic Sea from March 2013 to February 2014. A slight decrease of infection level, among the fish with body length ranging from 30 to 89.5 cm, was found when data were compared to a corresponding survey in the 1980s. Due to imprecise species identification of eye flukes based on morphometric analyses we present, as a baseline for further studies, rDNA sequences from a subsample of 19 eye flukes based on sequencing of a part of 18S, ITS-1, 5.8S, ITS-2 and part of 28S. We discuss the use of eye fluke recordings in Baltic cod as an environmental indicator due to the dependence of the parasite´s life cycle on biotic (occurrence of snail and bird hosts) and abiotic (temperature and salinity) parameters.

Keywords : Diplostomum; Gadus morhua; Baltic Sea; salinity; temperature

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About the article

Received: 2015-01-21

Revised: 2015-01-29

Accepted: 2015-03-10

Published Online: 2015-06-16

Published in Print: 2015-09-01


Citation Information: Acta Parasitologica, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.1515/ap-2015-0058.

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