Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool
Infection of Cancer pagurus by a parasitic dinoflagellate of the genus Hematodinium is described for the first time in Ireland. An industry-based monitoring programme was established to determine seasonality of infection intensity and prevalence in the country's 3 largest brown crab fisheries i...
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ftnuigalway:oai:https://researchrepository.universityofgalway.ie:10379/10782 2024-09-30T14:38:56+00:00 Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool Ní Chualáin, C Hayes, M Allen, B Robinson, M 2009-01-28 http://hdl.handle.net/10379/10782 https://doi.org/10.13025/25392 https://doi.org/10.3354/dao02013 unknown Inter-Research Science Center Diseases of Aquatic Organisms Ní Chualáin, C; Hayes, M; Allen, B; Robinson, M (2009). Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool. Diseases of Aquatic Organisms 83 (1), 59-66 0177-5103,1616-1580 http://hdl.handle.net/10379/10782 https://doi.org/10.13025/25392 doi:10.3354/dao02013 Attribution-NonCommercial-NoDerivs 3.0 Ireland https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ cancer pagurus hematodinium sp infection intensity fisheries management seasonal temperature bitter crab disease lobster nephrops-norvegicus parasitic dinoflagellate chionoecetes-bairdi callinectes-sapidus seasonal prevalence west-coast newfoundland opilio mortality Article 2009 ftnuigalway https://doi.org/10.13025/2539210.3354/dao02013 2024-09-17T14:44:29Z Infection of Cancer pagurus by a parasitic dinoflagellate of the genus Hematodinium is described for the first time in Ireland. An industry-based monitoring programme was established to determine seasonality of infection intensity and prevalence in the country's 3 largest brown crab fisheries in the southwest, north and southeast. The parasite was present in all areas for the majority of sampling periods, with highest prevalences recorded in pre-recruit animals of both sexes. Microscopic examination of haemolymph revealed trophont, plasmodial and dinospore stages of the parasite. Overall prevalence in males (16%) was higher than in females (9%). Prevalence of Hematodinium sp. infection ranged from 0 to 51%, but a distinct seasonal trend was not apparent. Infection intensity was seasonal with significantly higher peaks occurring in late autumn/early winter months than in other quarters, corresponding to industry reports of moribund and dead pink-shelled crabs in commercial catches. We postulate that seawater temperature or a temperature-linked process is a key factor in triggering the final stages of infection, as significant autumn peaks were followed by a reduction in infection intensity as temperature decreased in the late winter/early spring months with no increase in intensity again until the following autumn. We propose that infection intensity, rather than prevalence, provides a more appropriate indication of the period when there is greatest potential for biological and economic impacts; the parameter's application as a fisheries management tool is discussed. Article in Journal/Newspaper Newfoundland Chionoecetes bairdi National University of Ireland (NUI), Galway: ARAN |
institution |
Open Polar |
collection |
National University of Ireland (NUI), Galway: ARAN |
op_collection_id |
ftnuigalway |
language |
unknown |
topic |
cancer pagurus hematodinium sp infection intensity fisheries management seasonal temperature bitter crab disease lobster nephrops-norvegicus parasitic dinoflagellate chionoecetes-bairdi callinectes-sapidus seasonal prevalence west-coast newfoundland opilio mortality |
spellingShingle |
cancer pagurus hematodinium sp infection intensity fisheries management seasonal temperature bitter crab disease lobster nephrops-norvegicus parasitic dinoflagellate chionoecetes-bairdi callinectes-sapidus seasonal prevalence west-coast newfoundland opilio mortality Ní Chualáin, C Hayes, M Allen, B Robinson, M Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool |
topic_facet |
cancer pagurus hematodinium sp infection intensity fisheries management seasonal temperature bitter crab disease lobster nephrops-norvegicus parasitic dinoflagellate chionoecetes-bairdi callinectes-sapidus seasonal prevalence west-coast newfoundland opilio mortality |
description |
Infection of Cancer pagurus by a parasitic dinoflagellate of the genus Hematodinium is described for the first time in Ireland. An industry-based monitoring programme was established to determine seasonality of infection intensity and prevalence in the country's 3 largest brown crab fisheries in the southwest, north and southeast. The parasite was present in all areas for the majority of sampling periods, with highest prevalences recorded in pre-recruit animals of both sexes. Microscopic examination of haemolymph revealed trophont, plasmodial and dinospore stages of the parasite. Overall prevalence in males (16%) was higher than in females (9%). Prevalence of Hematodinium sp. infection ranged from 0 to 51%, but a distinct seasonal trend was not apparent. Infection intensity was seasonal with significantly higher peaks occurring in late autumn/early winter months than in other quarters, corresponding to industry reports of moribund and dead pink-shelled crabs in commercial catches. We postulate that seawater temperature or a temperature-linked process is a key factor in triggering the final stages of infection, as significant autumn peaks were followed by a reduction in infection intensity as temperature decreased in the late winter/early spring months with no increase in intensity again until the following autumn. We propose that infection intensity, rather than prevalence, provides a more appropriate indication of the period when there is greatest potential for biological and economic impacts; the parameter's application as a fisheries management tool is discussed. |
format |
Article in Journal/Newspaper |
author |
Ní Chualáin, C Hayes, M Allen, B Robinson, M |
author_facet |
Ní Chualáin, C Hayes, M Allen, B Robinson, M |
author_sort |
Ní Chualáin, C |
title |
Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool |
title_short |
Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool |
title_full |
Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool |
title_fullStr |
Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool |
title_full_unstemmed |
Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool |
title_sort |
hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool |
publisher |
Inter-Research Science Center |
publishDate |
2009 |
url |
http://hdl.handle.net/10379/10782 https://doi.org/10.13025/25392 https://doi.org/10.3354/dao02013 |
genre |
Newfoundland Chionoecetes bairdi |
genre_facet |
Newfoundland Chionoecetes bairdi |
op_relation |
Diseases of Aquatic Organisms Ní Chualáin, C; Hayes, M; Allen, B; Robinson, M (2009). Hematodinium sp. in irish cancer pagurus fisheries: infection intensity as a potential fisheries management tool. Diseases of Aquatic Organisms 83 (1), 59-66 0177-5103,1616-1580 http://hdl.handle.net/10379/10782 https://doi.org/10.13025/25392 doi:10.3354/dao02013 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Ireland https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ |
op_doi |
https://doi.org/10.13025/2539210.3354/dao02013 |
_version_ |
1811641521174216704 |