Occurrence of the Toxic Phytoflagellate Prymnesium parvumand Associated Fish Mortality in a Norwegian Fjord System
At the end of July 1989, toxin-producing Prymnesium parvum was spread through a fjord system in the surge of freshwater released from a hydroelectric power plant. In total, 750 tonnes of Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) died in fish farms. Prymnesium parvum germi...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1991
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Online Access: | http://dx.doi.org/10.1139/f91-272 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-272 |
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crcansciencepubl:10.1139/f91-272 2024-09-09T19:30:41+00:00 Occurrence of the Toxic Phytoflagellate Prymnesium parvumand Associated Fish Mortality in a Norwegian Fjord System Kaartvedt, S. Johnsen, T. M. Aksnes, D. L. Lie, U. Svendsen, H. 1991 http://dx.doi.org/10.1139/f91-272 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-272 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 12, page 2316-2323 ISSN 0706-652X 1205-7533 journal-article 1991 crcansciencepubl https://doi.org/10.1139/f91-272 2024-07-25T04:10:05Z At the end of July 1989, toxin-producing Prymnesium parvum was spread through a fjord system in the surge of freshwater released from a hydroelectric power plant. In total, 750 tonnes of Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) died in fish farms. Prymnesium parvum germinated in the brackish surface layer of a fjord branch which, during July, was characterized by longer residence time, higher temperatures, and lower nitrogen and silicate concentrations than the rest of the fjord system. Nutrient loading (especially phosphate) from fish farms may, however, have stimulated local growth of the alga. At the time of the first observed fish mortality, the salinity was 5‰ and the temperature 18 °C. Pelagic concentrations of P. parvum were generally low, with a maximum of 2.2 × 10 6 cells∙L −1 found close to a fish farm. Denser concentrations of P. parvum were, however, found in association with benthic substrates. Phosphorus limitation was probably important for the production of toxin by P. parvum. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 48 12 2316 2323 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
At the end of July 1989, toxin-producing Prymnesium parvum was spread through a fjord system in the surge of freshwater released from a hydroelectric power plant. In total, 750 tonnes of Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) died in fish farms. Prymnesium parvum germinated in the brackish surface layer of a fjord branch which, during July, was characterized by longer residence time, higher temperatures, and lower nitrogen and silicate concentrations than the rest of the fjord system. Nutrient loading (especially phosphate) from fish farms may, however, have stimulated local growth of the alga. At the time of the first observed fish mortality, the salinity was 5‰ and the temperature 18 °C. Pelagic concentrations of P. parvum were generally low, with a maximum of 2.2 × 10 6 cells∙L −1 found close to a fish farm. Denser concentrations of P. parvum were, however, found in association with benthic substrates. Phosphorus limitation was probably important for the production of toxin by P. parvum. |
format |
Article in Journal/Newspaper |
author |
Kaartvedt, S. Johnsen, T. M. Aksnes, D. L. Lie, U. Svendsen, H. |
spellingShingle |
Kaartvedt, S. Johnsen, T. M. Aksnes, D. L. Lie, U. Svendsen, H. Occurrence of the Toxic Phytoflagellate Prymnesium parvumand Associated Fish Mortality in a Norwegian Fjord System |
author_facet |
Kaartvedt, S. Johnsen, T. M. Aksnes, D. L. Lie, U. Svendsen, H. |
author_sort |
Kaartvedt, S. |
title |
Occurrence of the Toxic Phytoflagellate Prymnesium parvumand Associated Fish Mortality in a Norwegian Fjord System |
title_short |
Occurrence of the Toxic Phytoflagellate Prymnesium parvumand Associated Fish Mortality in a Norwegian Fjord System |
title_full |
Occurrence of the Toxic Phytoflagellate Prymnesium parvumand Associated Fish Mortality in a Norwegian Fjord System |
title_fullStr |
Occurrence of the Toxic Phytoflagellate Prymnesium parvumand Associated Fish Mortality in a Norwegian Fjord System |
title_full_unstemmed |
Occurrence of the Toxic Phytoflagellate Prymnesium parvumand Associated Fish Mortality in a Norwegian Fjord System |
title_sort |
occurrence of the toxic phytoflagellate prymnesium parvumand associated fish mortality in a norwegian fjord system |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/f91-272 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-272 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 12, page 2316-2323 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f91-272 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
48 |
container_issue |
12 |
container_start_page |
2316 |
op_container_end_page |
2323 |
_version_ |
1809899675791130624 |