Feeding habits of wild and escaped farmed Atlantic salmon, Salmo salar L., in the Northeast Atlantic
The stomach contents of 2992 wild and 863 putative escaped farmed Atlantic salmon caught on floating long-lines in a Faroese research fishery in the late autumn (November–December) and winter (February–March) in the Northeast Atlantic (63–66°N and 1–10°W) during three consecutive fishing periods 199...
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2001
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fthighwire:oai:open-archive.highwire.org:icesjms:58/4/916 2023-05-15T15:31:47+02:00 Feeding habits of wild and escaped farmed Atlantic salmon, Salmo salar L., in the Northeast Atlantic Jacobsen, Jan Arge Hansen, Lars Petter 2001-01-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/58/4/916 https://doi.org/10.1006/jmsc.2001.1084 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/58/4/916 http://dx.doi.org/10.1006/jmsc.2001.1084 Copyright (C) 2001, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Regular Articles TEXT 2001 fthighwire https://doi.org/10.1006/jmsc.2001.1084 2013-05-27T04:12:05Z The stomach contents of 2992 wild and 863 putative escaped farmed Atlantic salmon caught on floating long-lines in a Faroese research fishery in the late autumn (November–December) and winter (February–March) in the Northeast Atlantic (63–66°N and 1–10°W) during three consecutive fishing periods 1992/1993–1994/1995 were analysed. Hyperiid amphipods of the genus Themisto , euphausiids and mesopelagic shrimps are important sources of food for salmon in the autumn period and various mesopelagic fish as lantern fishes, pearlsides and barracudinas become equally important during the late winter period. The occasional presence in the stomachs of larger fish such as herring, blue whiting and mackerel is not considered to be evidence that these fish are a main source of food for salmon in the sea north of the Faroes. The proportion of stomachs containing food was significantly lower during autumn (53%) than during winter (78%). However, temperature-dependent evacuation rates could partly explain the apparent lower stomach content during the autumn, since the average ambient sea-surface temperature is 7°C in autumn compared to 3°C in winter. There was evidence of selective foraging. Fish were preferred over crustaceans, and amphipods were chosen over euphausiids. Large salmon (3+SW) tended to be more piscivorous than smaller fish. There was no difference in condition factor, number and weight proportions of prey, or in diet between wild and escaped farmed salmon, which suggests that escaped farmed salmon adapt well to the “wild” life in the ocean. Text Atlantic salmon Faroes Northeast Atlantic Salmo salar HighWire Press (Stanford University) ICES Journal of Marine Science 58 4 916 933 |
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HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Regular Articles |
spellingShingle |
Regular Articles Jacobsen, Jan Arge Hansen, Lars Petter Feeding habits of wild and escaped farmed Atlantic salmon, Salmo salar L., in the Northeast Atlantic |
topic_facet |
Regular Articles |
description |
The stomach contents of 2992 wild and 863 putative escaped farmed Atlantic salmon caught on floating long-lines in a Faroese research fishery in the late autumn (November–December) and winter (February–March) in the Northeast Atlantic (63–66°N and 1–10°W) during three consecutive fishing periods 1992/1993–1994/1995 were analysed. Hyperiid amphipods of the genus Themisto , euphausiids and mesopelagic shrimps are important sources of food for salmon in the autumn period and various mesopelagic fish as lantern fishes, pearlsides and barracudinas become equally important during the late winter period. The occasional presence in the stomachs of larger fish such as herring, blue whiting and mackerel is not considered to be evidence that these fish are a main source of food for salmon in the sea north of the Faroes. The proportion of stomachs containing food was significantly lower during autumn (53%) than during winter (78%). However, temperature-dependent evacuation rates could partly explain the apparent lower stomach content during the autumn, since the average ambient sea-surface temperature is 7°C in autumn compared to 3°C in winter. There was evidence of selective foraging. Fish were preferred over crustaceans, and amphipods were chosen over euphausiids. Large salmon (3+SW) tended to be more piscivorous than smaller fish. There was no difference in condition factor, number and weight proportions of prey, or in diet between wild and escaped farmed salmon, which suggests that escaped farmed salmon adapt well to the “wild” life in the ocean. |
format |
Text |
author |
Jacobsen, Jan Arge Hansen, Lars Petter |
author_facet |
Jacobsen, Jan Arge Hansen, Lars Petter |
author_sort |
Jacobsen, Jan Arge |
title |
Feeding habits of wild and escaped farmed Atlantic salmon, Salmo salar L., in the Northeast Atlantic |
title_short |
Feeding habits of wild and escaped farmed Atlantic salmon, Salmo salar L., in the Northeast Atlantic |
title_full |
Feeding habits of wild and escaped farmed Atlantic salmon, Salmo salar L., in the Northeast Atlantic |
title_fullStr |
Feeding habits of wild and escaped farmed Atlantic salmon, Salmo salar L., in the Northeast Atlantic |
title_full_unstemmed |
Feeding habits of wild and escaped farmed Atlantic salmon, Salmo salar L., in the Northeast Atlantic |
title_sort |
feeding habits of wild and escaped farmed atlantic salmon, salmo salar l., in the northeast atlantic |
publisher |
Oxford University Press |
publishDate |
2001 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/58/4/916 https://doi.org/10.1006/jmsc.2001.1084 |
genre |
Atlantic salmon Faroes Northeast Atlantic Salmo salar |
genre_facet |
Atlantic salmon Faroes Northeast Atlantic Salmo salar |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/58/4/916 http://dx.doi.org/10.1006/jmsc.2001.1084 |
op_rights |
Copyright (C) 2001, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.2001.1084 |
container_title |
ICES Journal of Marine Science |
container_volume |
58 |
container_issue |
4 |
container_start_page |
916 |
op_container_end_page |
933 |
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1766362305678802944 |