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<p>The occurrence of nematodes in the alimentary tract of great cormorant <italic>Phalacrocorax carbo</italic> (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 <italic>Contracaecum rudolphii</italic> 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: <italic>Eustrongylides excisus</italic> Jägerskiöld, 1909, <italic>Anisakis simplex</italic> (Rudolphi, 1809), <italic>Hysterothylacium aduncum</italic> (Rudolphi, 1802), <italic>Desmidocercella numidica</italic> Seurat, 1920, <italic>Synquaria squamata</italic> (Linstow, 1883), <italic>Cosmocephalus obvelatus</italic> (Creplin, 1825), <italic>Baruscapillaria carbonis</italic> (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 <italic>C. rudolphii</italic> 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 <italic>E. excisus</italic>. <italic>S. squamata</italic>, <italic>C. obvelatus</italic> and <italic>D. numidica</italic> were less common in both age groups. <italic>A. simplex</italic> and <italic>H. aduncum</italic> were found only in nestlings, while <italic>B. carbonis</italic> only in adults.</p>
</abstract>

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.

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

Department of Zoology, Faculty of Biology and Biotechnology

University of Warmia and Mazury in Olsztyn

Department of Fish Biology and Pisciculture, Faculty of Environmental Sciences

Oceanological and Hydrobiological Studies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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

The occurrence of nematodes in the alimentary tract of great cormorant Phalacrocorax carbo (L., 1758) nestlings was studied in the Włocławek Reservoir located...

Nematoda	Nestlings from Murzynowo					Adults from Tyniec
	P(%)	MI ± SD(RI)	Contribution (%)			P(%)	MI ± SD(RI)	Contribution (%)
	P(%)	MI ± SD(RI)	F	M	L	P(%)	MI ± SD(RI)	F	M	L
Contracaecum rudolphii	100	12.5 ± 5.9(2-22)	37.7	22.1	40.2	100	154.6 ± 111.4(39-545)	35.0	16.9	48.1
Anisakis simplex	20	0.7 ± 1.3(0-4)	0.0	0.0	100	0.0	0.0	0.0	0.0	0,0
Hysterothylacium aduncum	30	0.9 ± 1.5(0-5)	0.0	0.0	100	0.0	0.0	0.0	0.0	0.0
Cosmocephalus obvelatus	30	1.2 ± 2.1(0-6)	0.0	0.0	100	30	1.3 ± 2.5(0-7)	0.0	0.0	100
Syncuaria squamata	65	2.3 ± 2.0(0-6)	80.4	19.6	0.0	65	6.2 ± 7.6(0-28)	78.4	21.6	0.0
Eustrongylides excisus	75	4.2 ± 3.9(0-16)	59.5	40.5	0.0	80	7.0 ± 6.3(0-20)	85.7	14.3	0.0
Baruscapillaria carbonis	0.0	0.0	0.0	0.0	0.0	60	5.3 ± 8.6(0-34)	79.4	20.6	0.0
Desmidocercella numidica	45	1.7 ± 2.3(0-5)	0.0	0.0	100	25	1.2 ± 2.4(0-8)	0.0	0.0	100

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

Article Category: Original research paper

Published Online: May 31, 2017

Page range: 168 - 173

Received: Aug 02, 2016

Accepted: Nov 23, 2016

DOI: https://doi.org/10.1515/ohs-2017-0017

© Faculty of Oceanography and Geography, University of Gdańsk, Poland. All rights reserved.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Nematodes in great cormorants (Phalacrocorax carbo) from colonies in the area of the lower (Murzynowo) and upper (Tyniec) Vistula River. P – prevalence, MI – mean intensity, RI – range of intensity, F – female, M – male, L – third- and fourth-stage larvae, SD – standard deviation