Predation on salmon smolts, Salmo salar L., in the estuary of the River Surna, Norway
The post‐smolt stage of salmon, Salmo salar L., is subject to heavy mortality in Norway. Each year 35 000 hatchery‐reared smolts are stocked in the River Surna. Smolt stocking at sea and in the fjord resulted in recovery rates of adult salmon which were up to three times better than those resulting...
Published in: | Journal of Fish Biology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1987
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1987.tb05752.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1987.tb05752.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1987.tb05752.x |
id |
crwiley:10.1111/j.1095-8649.1987.tb05752.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1095-8649.1987.tb05752.x 2024-06-02T08:06:56+00:00 Predation on salmon smolts, Salmo salar L., in the estuary of the River Surna, Norway Hvidsten, N. A. Møkkelgjerd, P. I. 1987 http://dx.doi.org/10.1111/j.1095-8649.1987.tb05752.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1987.tb05752.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1987.tb05752.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 30, issue 3, page 273-280 ISSN 0022-1112 1095-8649 journal-article 1987 crwiley https://doi.org/10.1111/j.1095-8649.1987.tb05752.x 2024-05-03T10:36:28Z The post‐smolt stage of salmon, Salmo salar L., is subject to heavy mortality in Norway. Each year 35 000 hatchery‐reared smolts are stocked in the River Surna. Smolt stocking at sea and in the fjord resulted in recovery rates of adult salmon which were up to three times better than those resulting from river stockings. This was supposed to be due to by‐passing some predators. In 1984 and 1985 predators and their predation on smolts were studied in the R. Surna estuary. Cod, Gadus morhua , were found to prey heavily on smolts, and a total mortality up to 24.8% was found in a small restricted area. Cod are thought to assemble in the Surna estuary in the spring, foraging on the smolt run. Article in Journal/Newspaper Gadus morhua Salmo salar Wiley Online Library Norway Surna ENVELOPE(8.667,8.667,62.983,62.983) Journal of Fish Biology 30 3 273 280 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The post‐smolt stage of salmon, Salmo salar L., is subject to heavy mortality in Norway. Each year 35 000 hatchery‐reared smolts are stocked in the River Surna. Smolt stocking at sea and in the fjord resulted in recovery rates of adult salmon which were up to three times better than those resulting from river stockings. This was supposed to be due to by‐passing some predators. In 1984 and 1985 predators and their predation on smolts were studied in the R. Surna estuary. Cod, Gadus morhua , were found to prey heavily on smolts, and a total mortality up to 24.8% was found in a small restricted area. Cod are thought to assemble in the Surna estuary in the spring, foraging on the smolt run. |
format |
Article in Journal/Newspaper |
author |
Hvidsten, N. A. Møkkelgjerd, P. I. |
spellingShingle |
Hvidsten, N. A. Møkkelgjerd, P. I. Predation on salmon smolts, Salmo salar L., in the estuary of the River Surna, Norway |
author_facet |
Hvidsten, N. A. Møkkelgjerd, P. I. |
author_sort |
Hvidsten, N. A. |
title |
Predation on salmon smolts, Salmo salar L., in the estuary of the River Surna, Norway |
title_short |
Predation on salmon smolts, Salmo salar L., in the estuary of the River Surna, Norway |
title_full |
Predation on salmon smolts, Salmo salar L., in the estuary of the River Surna, Norway |
title_fullStr |
Predation on salmon smolts, Salmo salar L., in the estuary of the River Surna, Norway |
title_full_unstemmed |
Predation on salmon smolts, Salmo salar L., in the estuary of the River Surna, Norway |
title_sort |
predation on salmon smolts, salmo salar l., in the estuary of the river surna, norway |
publisher |
Wiley |
publishDate |
1987 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1987.tb05752.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1987.tb05752.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1987.tb05752.x |
long_lat |
ENVELOPE(8.667,8.667,62.983,62.983) |
geographic |
Norway Surna |
geographic_facet |
Norway Surna |
genre |
Gadus morhua Salmo salar |
genre_facet |
Gadus morhua Salmo salar |
op_source |
Journal of Fish Biology volume 30, issue 3, page 273-280 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1987.tb05752.x |
container_title |
Journal of Fish Biology |
container_volume |
30 |
container_issue |
3 |
container_start_page |
273 |
op_container_end_page |
280 |
_version_ |
1800751930230702080 |