Seasonal variations in the prevalence and infestation intensity of Gyrodactylus salaris Malmberg, 1957 (Monogenea: Gyrodactylidae) on Atlantic salmon parr, Salmo salar L., in the River Batnfjordselva, Norway
The prevalence of Gyrodactylus suluris Malmberg. 1957 on both yearlings and older parr of Atlantic salmon ( Sulmo sulur L.) in the River Batnfjordselva was 100% through most of the year. With one exception, uninfested fish were only found in the winter and spring after the water temperature had fall...
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crwiley:10.1111/j.1095-8649.1992.tb02699.x 2024-06-23T07:51:18+00:00 Seasonal variations in the prevalence and infestation intensity of Gyrodactylus salaris Malmberg, 1957 (Monogenea: Gyrodactylidae) on Atlantic salmon parr, Salmo salar L., in the River Batnfjordselva, Norway Mo, T. A. 1992 http://dx.doi.org/10.1111/j.1095-8649.1992.tb02699.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1992.tb02699.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1992.tb02699.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 41, issue 5, page 697-707 ISSN 0022-1112 1095-8649 journal-article 1992 crwiley https://doi.org/10.1111/j.1095-8649.1992.tb02699.x 2024-06-11T04:48:34Z The prevalence of Gyrodactylus suluris Malmberg. 1957 on both yearlings and older parr of Atlantic salmon ( Sulmo sulur L.) in the River Batnfjordselva was 100% through most of the year. With one exception, uninfested fish were only found in the winter and spring after the water temperature had fallen to almost 0° C for 2–3 months. In general, the abundance (i.e. the mean number of parasites per investigated fish) of G. salaris increased during the warm period of the year (summer and early autumn). Abundanceas high as 1153 and 4418 in early autumn was found on yearlings and older parr, respectively. The abundance decreased during the cold period of the year (winter and early spring), in some cases to as low as two and four G. salaris on yearlings and older parr, respectively. About 86% of the G. salaris specimens were found on the fins of the salmon parr: mainly on the dorsal fin (34.4%) and the pectoral fins (27.0%). The remainder of the parasites were distributed on the body (7.8%), the head (3.5%), and the gills (2.6%). Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Norway Journal of Fish Biology 41 5 697 707 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
The prevalence of Gyrodactylus suluris Malmberg. 1957 on both yearlings and older parr of Atlantic salmon ( Sulmo sulur L.) in the River Batnfjordselva was 100% through most of the year. With one exception, uninfested fish were only found in the winter and spring after the water temperature had fallen to almost 0° C for 2–3 months. In general, the abundance (i.e. the mean number of parasites per investigated fish) of G. salaris increased during the warm period of the year (summer and early autumn). Abundanceas high as 1153 and 4418 in early autumn was found on yearlings and older parr, respectively. The abundance decreased during the cold period of the year (winter and early spring), in some cases to as low as two and four G. salaris on yearlings and older parr, respectively. About 86% of the G. salaris specimens were found on the fins of the salmon parr: mainly on the dorsal fin (34.4%) and the pectoral fins (27.0%). The remainder of the parasites were distributed on the body (7.8%), the head (3.5%), and the gills (2.6%). |
format |
Article in Journal/Newspaper |
author |
Mo, T. A. |
spellingShingle |
Mo, T. A. Seasonal variations in the prevalence and infestation intensity of Gyrodactylus salaris Malmberg, 1957 (Monogenea: Gyrodactylidae) on Atlantic salmon parr, Salmo salar L., in the River Batnfjordselva, Norway |
author_facet |
Mo, T. A. |
author_sort |
Mo, T. A. |
title |
Seasonal variations in the prevalence and infestation intensity of Gyrodactylus salaris Malmberg, 1957 (Monogenea: Gyrodactylidae) on Atlantic salmon parr, Salmo salar L., in the River Batnfjordselva, Norway |
title_short |
Seasonal variations in the prevalence and infestation intensity of Gyrodactylus salaris Malmberg, 1957 (Monogenea: Gyrodactylidae) on Atlantic salmon parr, Salmo salar L., in the River Batnfjordselva, Norway |
title_full |
Seasonal variations in the prevalence and infestation intensity of Gyrodactylus salaris Malmberg, 1957 (Monogenea: Gyrodactylidae) on Atlantic salmon parr, Salmo salar L., in the River Batnfjordselva, Norway |
title_fullStr |
Seasonal variations in the prevalence and infestation intensity of Gyrodactylus salaris Malmberg, 1957 (Monogenea: Gyrodactylidae) on Atlantic salmon parr, Salmo salar L., in the River Batnfjordselva, Norway |
title_full_unstemmed |
Seasonal variations in the prevalence and infestation intensity of Gyrodactylus salaris Malmberg, 1957 (Monogenea: Gyrodactylidae) on Atlantic salmon parr, Salmo salar L., in the River Batnfjordselva, Norway |
title_sort |
seasonal variations in the prevalence and infestation intensity of gyrodactylus salaris malmberg, 1957 (monogenea: gyrodactylidae) on atlantic salmon parr, salmo salar l., in the river batnfjordselva, norway |
publisher |
Wiley |
publishDate |
1992 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1992.tb02699.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1992.tb02699.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1992.tb02699.x |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology volume 41, issue 5, page 697-707 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1992.tb02699.x |
container_title |
Journal of Fish Biology |
container_volume |
41 |
container_issue |
5 |
container_start_page |
697 |
op_container_end_page |
707 |
_version_ |
1802642350096252928 |