Lunneryd, Sven-Gunnar and Boström, Maria and Aspholm, Paul Eric
(2015).
Sealworm (Pseudoterranova decipiens) infection in grey seals (Halichoerus grypus), cod (Gadus morhua) and shorthorn sculpin (Myoxocephalus scorpius) in the Baltic Sea.
Parasitology research. 114
:1
, 257-264
[Research article]
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308kB |
Official URL: http://dx.doi.org/10.1007/s00436-014-4187-z
Abstract
The anisakid nematode Pseudoterranova decipiens, known as the sealworm or cod worm, can infect the flesh of several fish species. The parasite causes cosmetic problems for the fish industry and can cause abdominal discomfort if consumed by humans. There are only scattered studies on the abundance or distribution of the sealworm in fish and seals in the Baltic Sea. To remedy this situation, the extent of sealworm infection was investigated in cod (Gadus morhua) and shorthorn sculpin (Myoxocephalus scorpius) collected along the Swedish coast. A relative presence of the sealworm was also investigated in samples from grey seal (Halichoerus grypus) stomachs. Up to 100 % of the fish were infected in some of the areas. Sculpin were generally worse infected than cod, both in abundance and prevalence of parasites. General linear models showed a significant correlation between the number of seals in an area and the prevalence of sealworms in cod. There was a sharp decrease of infected fish in areas with salinity lower than 7 aEuro degrees. Even though the northern Baltic proper and the southern Bothnian Sea have a high number of grey seals, only one sealworm was found in a sculpin in that region, and none in cod. In grey seal stomachs the sealworm was only found in samples from the central Baltic proper; further north, all anisakid nematodes identified in seals were Contracaecum osculatum. The results indicate that seal presence drives the distribution in the southern parts of the Baltic and that low salinity, or some other variable which correlates with salinity, limits the distribution in the northern part.
Authors/Creators: | Lunneryd, Sven-Gunnar and Boström, Maria and Aspholm, Paul Eric | ||||
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Title: | Sealworm (Pseudoterranova decipiens) infection in grey seals (Halichoerus grypus), cod (Gadus morhua) and shorthorn sculpin (Myoxocephalus scorpius) in the Baltic Sea | ||||
Series Name/Journal: | Parasitology research | ||||
Year of publishing : | 2015 | ||||
Volume: | 114 | ||||
Number: | 1 | ||||
Page range: | 257-264 | ||||
Number of Pages: | 8 | ||||
Publisher: | Springer Verlag | ||||
ISSN: | 1432-1955 | ||||
Language: | English | ||||
Publication Type: | Research article | ||||
Refereed: | Yes | ||||
Article category: | Scientific peer reviewed | ||||
Version: | Accepted version | ||||
Full Text Status: | Public | ||||
Agris subject categories.: | M Aquatic sciences and fisheries > M40 Aquatic ecology | ||||
Subjects: | (A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology | ||||
Agrovoc terms: | baltic sea, cod, seals, sculpins | ||||
Keywords: | baltic sea, cod, grey seal, pseudoterranova, sealworm, sculpin | ||||
URN:NBN: | urn:nbn:se:slu:epsilon-e-2518 | ||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-2518 | ||||
Additional ID: |
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ID Code: | 12013 | ||||
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap | ||||
Department: | (NL, NJ) > Department of Aquatic Resources | ||||
Deposited By: | SLUpub Connector | ||||
Deposited On: | 27 Mar 2015 08:47 | ||||
Metadata Last Modified: | 09 Sep 2020 14:17 |
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