Parasitological survey of smelt, Osmerus eperlanus (Actinopterygii: Osmeridae), from five estuary sites along the southern coast of the Baltic Sea

Study site	n
		Standard length (cm)		Weight (g)		K
		Mean ± SD	Range	Mean ± SD	Range	Mean ± SD	Range
Curonian Lagoon	51	18.5 ± 2.3	15.2-24.0	35.9 ± 13.6	13.0-66.5	0.55 ± 0.09	0.42-0.69
Gulf of Gdańsk	35	10.0 ± 1.01	8.5-12.3	5.01 ± 1.8	2.7-9.6	0.47 ± 0.04	0.40-0.53
Pomeranian Bay	128	13.0 ± 2.8	5.9-19.7	14.9 ± 10.0	1.3-51.3	0.59 ± 0.09	0.40-0.74
Oder River	98	17.5 ± 3.6	11.3-23.4	37.2 ± 20.7	7.6-86.6	0.60 ± 0.07	0.48-0.77
Lake Dąbie	120	17.5 ± 3.5	11.0-23.2	32.5 ± 15.9	10.0-75.0	0.58 ± 0.11	0.40-0.90

n = number of fish studied; K = Fulton’s condition factor.

Table 2

Parasite species recovered from smelt, Osmerus eperlanus, from five estuary sites of major rivers of the southern Baltic Sea: principal infection parameters

Parasite species	Parameter	Study site
Parasite species	Parameter	Curonian Lagoon	Gulf of Gdańsk	Pomeranian Bay	Oder River	Lake Dąbie
Diplostomum spp. MET	NFI	4	13	29	14	4
	P (%)	7.8	34.3	22.7	14.4	3.3
	Intensity	1-2	1-4	1-51	1-2	1-4
	Mean	1.25	1.85	8.07	1.71	2.25
	NP	5	24	234	24	14
	D	0.07	58.54	62.4	0.86	0.11
Posthodiplostomum cuticola MET	NFI					1
	P (%)					0.8
	Intensity					1
	Mean					1
	NP					1
	D					0.01
Eubothrium crassum	NFI	3		2
	P (%)	5.9		1.6
	Intensity	1-6		1-2
	Mean	1.33		1.5
	NP	10		3
	D	0.13		0.80
Proteocephalus longicollis	NFI	7	5	9	8	52
	P (%)	13.8	14.3	7.0	8.2	43.3
	Intensity	1-6	1-4	1-4	1-41	1-101
	Mean	3.29	1.8	2.11	11.13	9.15
	NP	23	9	19	89	476
	D	0.31	21.95	5.07	3.19	3.62
Eubothrium crassum	NFI	3		2
	P (%)	5.9		1.6
	Intensity	1-6		1-2
	Mean	1.33		1.5
	NP	10		3
	D	0.13		0.80
Cystidicola farionis	NFI	50		1	1	48
	P (%)	98.0		1.6	1.0	40.0
	Intensity	8-388		10	25	2-243
	Mean	145.68		10	25	65.2
	NP	7284		10	25	3131
	D	96.72		2.67	0.90	23.83
Hysterothylacium aduncum LRV + AD	NFI	32	6	11	2	45
	P (%)	62.8	17.4	8.6	2.0	37.5
	Intensity	1-42	1-2	1-8	1-2	1-2
	Mean	6.5	1.17	2.36	1.5	1.18
	NP	208	7	26	3	53
	D	2.76	17.07	6.93	0.11	0.40
Corynosoma semerme JUV	NFI	1		1	1
	P (%)	2.0		1.6	1.0
	Intensity	1		1	27
	Mean	1		1	27
	NP	1		1	27
	D	0.01		0.27	0.97
Pomphorhynchus laevis	NFI		1	11		2
	P (%)		2.9	8.6		1.7
	Intensity		1	1-15		1
	Mean		1	4.63		1
	NP		1	51		2
	D		2.44	13.6		0.02
Unionidae gen sp. GL	NFI				71	120
	P (%)				72.5	100.0
	Intensity				2-341	1-578
	Mean				36.76	78.8
	NP				2610	9456
	D				93.65	71.97
Ergasilus sieboldi	NFI			6	4
	P (%)			4.7	4.1
	Intensity			1-13	1-5
	Mean			5.17	2.25
	NP			31	9
	D			8.27	0.32
Argulus foliaceus	NFI					3
	P (%)					2.5
	Intensity					1
	Mean					1
	NP					3
	D					0.023
Piscicola geometra	NFI					2
	P (%)					1.7
	Intensity					1
	Mean					1
	NP					2
	D					0.015
Saprolegniaceae gen. sp.	NFI					3

NFI = number of fish infected, P = prevalence (percentage of hosts infected), Intensity = infection intensity range, Mean = mean intensity of infection (related to infected hosts only), NP = number of parasites found, D = coefficient of dominance, MET = metacercariae, LRV = larvae, AD = adult (also all species names without a label were adults), JUV = juvenile, GL = glochidia

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DOI: https://doi.org/10.1515/ohs-2017-0033 | Journal eISSN: 1897-3191 | Journal ISSN: 1730-413X

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Language: English

Page range: 314 - 324

Submitted on: Nov 22, 2016

Accepted on: Apr 10, 2017

Published on: Sep 27, 2017

Published by: University of Gdańsk

In partnership with: Paradigm Publishing Services

Publication frequency: 4 issues per year

Keywords:

smelt,

survey,

estuary,

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© 2017 Małgorzata Pilecka-Rapacz, Wojciech Piasecki, Małgorzata Głoćko, Vytautas Kesminas, Józef Domagała, Gerard Wiśniewski, Robert Czerniawski, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Volume 46 (2017): Issue 3 (September 2017)