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  Ichthyocotylurus erraticus (Digenea : Strigeldae): factors affecting infection intensity and the effects of infection on pollan (Coregonus autumnalis), a glacial relict fish

Harrod, C., & Griffiths, D. (2005). Ichthyocotylurus erraticus (Digenea: Strigeldae): factors affecting infection intensity and the effects of infection on pollan (Coregonus autumnalis), a glacial relict fish. Parasitology, 131(4), 511-519. doi:10.1017/S0031182005007985.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D98D-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D98E-9
Genre: Journal Article

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Harrod & Griffiths 2005 Parasitology 131 511-519.pdf (Publisher version), 218KB
 
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Harrod, C.1, Author              
Griffiths, D., Author
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1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              

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Free keywords: risks; rewards; spatial and temporal variation
 Abstract: Lough Neagh Pollan are heavily infected with the strigeid Ichthyocotylurus erraticus, with 100% prevalence and median infection intensities of 600+ metacercariae in the pericardial cavity of mature fish. Female fish were more heavily infected than males. Infection intensity, which rose in summer, varied with pollan size, year, sampling bay within the lough and, water depth within bays. Heavily infected Pollan were caught further offshore than lightly infected fish. Spatial variation in Pollan infection intensity corresponded to variation in the abundance of the first intermediate host, Valvata snails. The data Suggest that heavily infected fish had lower food intakes. Parasitism reduced condition and liver size in male fish but condition in heavily parasitized females increased. Infection intensity was greater in larger fish of a given age. These patterns are discussed in the context of risks and rewards. The data suggest that inshore waters in summer are the preferred habitat of pollan and that the greater infection intensity of offshore fish results from their reduced competitive ability as a consequence of parasitism and the increased risk of infection there.

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Language(s): eng - English
 Dates: 2005-10
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 250715
DOI: 10.1017/S0031182005007985
Other: 2427/S 38444
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Title: Parasitology
Source Genre: Journal
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Pages: - Volume / Issue: 131 (4) Sequence Number: - Start / End Page: 511 - 519 Identifier: ISSN: 0031-1820