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Volume 46, Issue 2


Occurrence of Nematodes in the alimentary tract of great cormorants [Phalacrocorax carbo (Linnaeus, 1758)] in colonies located in the upper and lower Vistula River

Izabela Stocka
  • Department of Zoology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, ul. M. Oczapowskiego 5, 10-718 Olsztyn, Poland
  • Other articles by this author:
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/ Janina Dziekońska-Rynko
  • Corresponding author
  • Department of Zoology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, ul. M. Oczapowskiego 5, 10-718 Olsztyn, Poland
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/ Katarzyna Mierzejewska
  • Department of Fish Biology and Pisciculture, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, ul. M. Oczapowskiego 5, 10-718 Olsztyn, Poland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Katarzyna Stańczak
  • Department of Fish Biology and Pisciculture, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, ul. M. Oczapowskiego 5, 10-718 Olsztyn, Poland
  • Other articles by this author:
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/ Bogdan Wziątek
  • Department of Fish Biology and Pisciculture, Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, ul. M. Oczapowskiego 5, 10-718 Olsztyn, Poland
  • Other articles by this author:
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Published Online: 2017-05-31 | DOI: https://doi.org/10.1515/ohs-2017-0017


The occurrence of nematodes in the alimentary tract of great cormorant Phalacrocorax carbo (L., 1758) nestlings was studied in the Włocławek Reservoir located on the Vistula in central Poland and in adult birds wintering in the south of Poland, with the food base in the upper Vistula. Mixed (max 4 species) nematode infections were found in all birds. Apart from Contracaecum rudolphii Hartwich, 1964 found in all studied birds, the third- and fourth-stage larvae as well as adult individuals of the following species were also present: Eustrongylides excisus Jägerskiöld, 1909, Anisakis simplex (Rudolphi, 1809), Hysterothylacium aduncum (Rudolphi, 1802), Desmidocercella numidica Seurat, 1920, Synquaria squamata (Linstow, 1883), Cosmocephalus obvelatus (Creplin, 1825), Baruscapillaria carbonis (Dubinin et Dubinina, 1940). The overall mean intensity of infection with nematodes was 23.4 ± 11.6 in nestlings and 175.7 ± 110.9 in adult cormorants. The most common species was C. rudolphii with the mean infection intensity of 12.5 ± 5.9 in nestlings and 154.6 ± 111.4 in adults. The second most common species was E. excisus. S. squamata, C. obvelatus and D. numidica were less common in both age groups. A. simplex and H. aduncum were found only in nestlings, while B. carbonis only in adults.

Key words: great cormorant; parasite; Nematoda


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About the article

Received: 2016-08-02

Accepted: 2016-11-23

Published Online: 2017-05-31

Published in Print: 2017-06-27

Citation Information: Oceanological and Hydrobiological Studies, Volume 46, Issue 2, Pages 168–173, ISSN (Online) 1897-3191, ISSN (Print) 1730-413X, DOI: https://doi.org/10.1515/ohs-2017-0017.

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