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  Parasitism, space constraints, and gonad asymmetry in the pollan (Coregonus autumnalis)

Harrod, C., & Griffiths, D. (2005). Parasitism, space constraints, and gonad asymmetry in the pollan (Coregonus autumnalis). Canadian Journal of Fisheries and Aquatic Sciences, 62(12), 2796-2801. doi:10.1139/F05-175.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D955-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D956-7
Genre: Journal Article

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Harrod & Griffiths 2005 CJFAS 62 2796-2801.pdf (Publisher version), 214KB
 
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Harrod & Griffiths 2005 CJFAS 62 2796-2801.pdf
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 Creators:
Harrod, Chris1, Author              
Griffiths, David, 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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 Abstract: Both sexes of Lough Neagh pollan (Coregonus autumnalis) show directional asymmetry in gonad mass, the left being larger than the right in 70% of individuals. The frequency and degree of asymmetry are size independent in males but become progressively more marked in females of > 120 g somatic mass. There is little evidence to support the hypothesis that the size of the body cavity constrains gonad size. Pollan are heavily and size-dependently infected by metacercariae of the trematode Ichthyocotylurus erraticus. Total gonad mass in both sexes of pollan is negatively correlated with infection intensity of this parasite. In females, mean egg size shows no trend but fecundity declines and the degree of asymmetry in ovary mass increases with infection intensity up to a threshold, beyond which it remains constant. While directional asymmetry in gonad size is strongly developmentally controlled in many fish species, variation in the degree of gonad asymmetry in pollan provides a potentially sensitive indicator of stress

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Language(s): eng - English
 Dates: 2005-12
 Publication Status: Published in print
 Pages: -
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 Rev. Method: -
 Identifiers: eDoc: 250654
DOI: 10.1139/F05-175
Other: 2426/S 38443
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Title: Canadian Journal of Fisheries and Aquatic Sciences
  Alternative Title : Can. J. Fish. Aquat. Sci.
Source Genre: Journal
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Pages: - Volume / Issue: 62 (12) Sequence Number: - Start / End Page: 2796 - 2801 Identifier: ISSN: 0706-652X