Parasitism, space constraints, and gonad asymmetry in the pollan ( Coregonus autumnalis )
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 m...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2005
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Online Access: | http://dx.doi.org/10.1139/f05-175 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-175 |
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crcansciencepubl:10.1139/f05-175 2023-12-17T10:28:57+01:00 Parasitism, space constraints, and gonad asymmetry in the pollan ( Coregonus autumnalis ) Harrod, Chris Griffiths, David 2005 http://dx.doi.org/10.1139/f05-175 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-175 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 62, issue 12, page 2796-2801 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2005 crcansciencepubl https://doi.org/10.1139/f05-175 2023-11-19T13:38:44Z 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. Article in Journal/Newspaper Coregonus autumnalis Canadian Science Publishing (via Crossref) Pollan ENVELOPE(15.148,15.148,68.321,68.321) Canadian Journal of Fisheries and Aquatic Sciences 62 12 2796 2801 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Harrod, Chris Griffiths, David Parasitism, space constraints, and gonad asymmetry in the pollan ( Coregonus autumnalis ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Harrod, Chris Griffiths, David |
author_facet |
Harrod, Chris Griffiths, David |
author_sort |
Harrod, Chris |
title |
Parasitism, space constraints, and gonad asymmetry in the pollan ( Coregonus autumnalis ) |
title_short |
Parasitism, space constraints, and gonad asymmetry in the pollan ( Coregonus autumnalis ) |
title_full |
Parasitism, space constraints, and gonad asymmetry in the pollan ( Coregonus autumnalis ) |
title_fullStr |
Parasitism, space constraints, and gonad asymmetry in the pollan ( Coregonus autumnalis ) |
title_full_unstemmed |
Parasitism, space constraints, and gonad asymmetry in the pollan ( Coregonus autumnalis ) |
title_sort |
parasitism, space constraints, and gonad asymmetry in the pollan ( coregonus autumnalis ) |
publisher |
Canadian Science Publishing |
publishDate |
2005 |
url |
http://dx.doi.org/10.1139/f05-175 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-175 |
long_lat |
ENVELOPE(15.148,15.148,68.321,68.321) |
geographic |
Pollan |
geographic_facet |
Pollan |
genre |
Coregonus autumnalis |
genre_facet |
Coregonus autumnalis |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 62, issue 12, page 2796-2801 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f05-175 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
62 |
container_issue |
12 |
container_start_page |
2796 |
op_container_end_page |
2801 |
_version_ |
1785581206889299968 |