Does increased abundance of sea lice influence survival of wild Atlantic salmon post‐smolt?
A synthesis of results from two projects was assessed to analyse possible influence of sea lice Lepeophtheirus salmonis on marine Atlantic salmon Salmo salar survival. During the years 1992–2004, trawling for wild migrating post‐smolts was performed in Trondheimsfjord, a fjord in which no Atlantic s...
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crwiley:10.1111/j.1095-8649.2007.01622.x 2024-06-02T08:03:15+00:00 Does increased abundance of sea lice influence survival of wild Atlantic salmon post‐smolt? Hvidsten, N. A. Finstad, B. Kroglund, F. Johnsen, B. O. Strand, R. Arnekleiv, J. V. Bjørn, P. A. 2007 http://dx.doi.org/10.1111/j.1095-8649.2007.01622.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2007.01622.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2007.01622.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 71, issue 6, page 1639-1648 ISSN 0022-1112 1095-8649 journal-article 2007 crwiley https://doi.org/10.1111/j.1095-8649.2007.01622.x 2024-05-03T11:47:44Z A synthesis of results from two projects was assessed to analyse possible influence of sea lice Lepeophtheirus salmonis on marine Atlantic salmon Salmo salar survival. During the years 1992–2004, trawling for wild migrating post‐smolts was performed in Trondheimsfjord, a fjord in which no Atlantic salmon aquaculture activity is permitted. Prevalence and intensity of sea lice infections on migrating wild post‐smolts differed between years. A correlation analysis between 1 sea‐winter (SW) Atlantic salmon catch statistics from the River Orkla (a Trondheimsfjord river) and sea lice infections on the migrating smolts in the Trondheimsfjord was not significant. Up to 2% reduction in adult returns due to sea‐lice infection was expected. In addition, experimental releases from 1996 to 1998 with individually tagged groups of hatchery‐reared Atlantic salmon smolts given protection against sea‐lice infection was performed. Higher recaptures of adult Atlantic salmon from 1998 treated smolts compared to the control group may correspond to high abundance of sea lice found on the wild smolt, and may indicate influence on post‐smolt mortality. These studies indicate that post‐smolt mortality in Trondheimsfjord is marginally influenced by sea lice infection; however, the methods for assessing wild smolt mortality might be insufficient. Higher infections of sea lice farther out in the fjord may indicate more loss in Atlantic salmon returns in some years. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Orkla ENVELOPE(9.831,9.831,63.311,63.311) Journal of Fish Biology 71 6 1639 1648 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
A synthesis of results from two projects was assessed to analyse possible influence of sea lice Lepeophtheirus salmonis on marine Atlantic salmon Salmo salar survival. During the years 1992–2004, trawling for wild migrating post‐smolts was performed in Trondheimsfjord, a fjord in which no Atlantic salmon aquaculture activity is permitted. Prevalence and intensity of sea lice infections on migrating wild post‐smolts differed between years. A correlation analysis between 1 sea‐winter (SW) Atlantic salmon catch statistics from the River Orkla (a Trondheimsfjord river) and sea lice infections on the migrating smolts in the Trondheimsfjord was not significant. Up to 2% reduction in adult returns due to sea‐lice infection was expected. In addition, experimental releases from 1996 to 1998 with individually tagged groups of hatchery‐reared Atlantic salmon smolts given protection against sea‐lice infection was performed. Higher recaptures of adult Atlantic salmon from 1998 treated smolts compared to the control group may correspond to high abundance of sea lice found on the wild smolt, and may indicate influence on post‐smolt mortality. These studies indicate that post‐smolt mortality in Trondheimsfjord is marginally influenced by sea lice infection; however, the methods for assessing wild smolt mortality might be insufficient. Higher infections of sea lice farther out in the fjord may indicate more loss in Atlantic salmon returns in some years. |
format |
Article in Journal/Newspaper |
author |
Hvidsten, N. A. Finstad, B. Kroglund, F. Johnsen, B. O. Strand, R. Arnekleiv, J. V. Bjørn, P. A. |
spellingShingle |
Hvidsten, N. A. Finstad, B. Kroglund, F. Johnsen, B. O. Strand, R. Arnekleiv, J. V. Bjørn, P. A. Does increased abundance of sea lice influence survival of wild Atlantic salmon post‐smolt? |
author_facet |
Hvidsten, N. A. Finstad, B. Kroglund, F. Johnsen, B. O. Strand, R. Arnekleiv, J. V. Bjørn, P. A. |
author_sort |
Hvidsten, N. A. |
title |
Does increased abundance of sea lice influence survival of wild Atlantic salmon post‐smolt? |
title_short |
Does increased abundance of sea lice influence survival of wild Atlantic salmon post‐smolt? |
title_full |
Does increased abundance of sea lice influence survival of wild Atlantic salmon post‐smolt? |
title_fullStr |
Does increased abundance of sea lice influence survival of wild Atlantic salmon post‐smolt? |
title_full_unstemmed |
Does increased abundance of sea lice influence survival of wild Atlantic salmon post‐smolt? |
title_sort |
does increased abundance of sea lice influence survival of wild atlantic salmon post‐smolt? |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1095-8649.2007.01622.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2007.01622.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2007.01622.x |
long_lat |
ENVELOPE(9.831,9.831,63.311,63.311) |
geographic |
Orkla |
geographic_facet |
Orkla |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology volume 71, issue 6, page 1639-1648 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.2007.01622.x |
container_title |
Journal of Fish Biology |
container_volume |
71 |
container_issue |
6 |
container_start_page |
1639 |
op_container_end_page |
1648 |
_version_ |
1800747721700671488 |