Lymphocytopenia and the overwinter survival of Atlantic salmon parr, Salmo salar L.
The overwinter mortality rate of underyearling S2 Atlantic salmon parr (fish that will remain in fresh water for at least two years prior to smoltification) was almost ten times greater than that of S1 parr (fish that will smoltify after 1 year in fresh water) kept under similar conditions. The loss...
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crwiley:10.1111/j.1095-8649.1988.tb05409.x 2023-12-03T10:19:25+01:00 Lymphocytopenia and the overwinter survival of Atlantic salmon parr, Salmo salar L. Pickering, A. D. Pottinger, T. G. 1988 http://dx.doi.org/10.1111/j.1095-8649.1988.tb05409.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1988.tb05409.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1988.tb05409.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 32, issue 5, page 689-697 ISSN 0022-1112 1095-8649 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1988 crwiley https://doi.org/10.1111/j.1095-8649.1988.tb05409.x 2023-11-09T13:35:56Z The overwinter mortality rate of underyearling S2 Atlantic salmon parr (fish that will remain in fresh water for at least two years prior to smoltification) was almost ten times greater than that of S1 parr (fish that will smoltify after 1 year in fresh water) kept under similar conditions. The loss of condition ( K factor) of the S2 parr was proportionally greater than that of S1 parr during the early winter months and this coincided with a marked lymphocytopenia and thrombocytopenia in the S2 parr. Limited evidence indicates that S2 parr have chronically elevated blood cortisol levels during the winter months. It is suggested that chronic stress resulting (in part) from nutritional deficiency has a debilitating effect on the defence systems of these fish. The ultimate cause of mortality in most cases was bacterial fin‐rot and/or fungal ( Saprolegnia ) infection. These findings are discussed in relation to the habitat requirements of overwintering salmonid fish. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library (via Crossref) Journal of Fish Biology 32 5 689 697 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Pickering, A. D. Pottinger, T. G. Lymphocytopenia and the overwinter survival of Atlantic salmon parr, Salmo salar L. |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
The overwinter mortality rate of underyearling S2 Atlantic salmon parr (fish that will remain in fresh water for at least two years prior to smoltification) was almost ten times greater than that of S1 parr (fish that will smoltify after 1 year in fresh water) kept under similar conditions. The loss of condition ( K factor) of the S2 parr was proportionally greater than that of S1 parr during the early winter months and this coincided with a marked lymphocytopenia and thrombocytopenia in the S2 parr. Limited evidence indicates that S2 parr have chronically elevated blood cortisol levels during the winter months. It is suggested that chronic stress resulting (in part) from nutritional deficiency has a debilitating effect on the defence systems of these fish. The ultimate cause of mortality in most cases was bacterial fin‐rot and/or fungal ( Saprolegnia ) infection. These findings are discussed in relation to the habitat requirements of overwintering salmonid fish. |
format |
Article in Journal/Newspaper |
author |
Pickering, A. D. Pottinger, T. G. |
author_facet |
Pickering, A. D. Pottinger, T. G. |
author_sort |
Pickering, A. D. |
title |
Lymphocytopenia and the overwinter survival of Atlantic salmon parr, Salmo salar L. |
title_short |
Lymphocytopenia and the overwinter survival of Atlantic salmon parr, Salmo salar L. |
title_full |
Lymphocytopenia and the overwinter survival of Atlantic salmon parr, Salmo salar L. |
title_fullStr |
Lymphocytopenia and the overwinter survival of Atlantic salmon parr, Salmo salar L. |
title_full_unstemmed |
Lymphocytopenia and the overwinter survival of Atlantic salmon parr, Salmo salar L. |
title_sort |
lymphocytopenia and the overwinter survival of atlantic salmon parr, salmo salar l. |
publisher |
Wiley |
publishDate |
1988 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1988.tb05409.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1988.tb05409.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1988.tb05409.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology volume 32, issue 5, page 689-697 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1988.tb05409.x |
container_title |
Journal of Fish Biology |
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32 |
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5 |
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689 |
op_container_end_page |
697 |
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1784266663986724864 |