Experimental studies on planting artificial stream channels with unfed and six weeks fed salmon ( Salmo salar L.) and trout ( S. trutta L.) fry/parr
Abstract– Experimental comparisons were made between release as unfed fry and release as six weeks fed parr, upon the growth and final population density of young salmon and trout over a ten week period. Salmon and trout released into experimental channels as unfed fry at densities of about 19 fish....
Published in: | Ecology of Freshwater Fish |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1111/j.1600-0633.1996.tb00038.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.1996.tb00038.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.1996.tb00038.x |
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crwiley:10.1111/j.1600-0633.1996.tb00038.x 2023-12-03T10:29:42+01:00 Experimental studies on planting artificial stream channels with unfed and six weeks fed salmon ( Salmo salar L.) and trout ( S. trutta L.) fry/parr Crisp, D. T. 1996 http://dx.doi.org/10.1111/j.1600-0633.1996.tb00038.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.1996.tb00038.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.1996.tb00038.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 5, issue 2, page 68-75 ISSN 0906-6691 1600-0633 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1996 crwiley https://doi.org/10.1111/j.1600-0633.1996.tb00038.x 2023-11-09T13:34:29Z Abstract– Experimental comparisons were made between release as unfed fry and release as six weeks fed parr, upon the growth and final population density of young salmon and trout over a ten week period. Salmon and trout released into experimental channels as unfed fry at densities of about 19 fish. m ‐2 showed rapid reduction in numbers, chiefly by downstream dispersal, accompanied by negligible growth. After substantial reduction in numbers, there was a reduced rate of dispersal and rapid growth. Salmon and trout retained in a hatchery at high density (80 to 200 fish. m ‐2 ) and fed for six weeks on proprietary food showed slow, but measurable, growth. After release into the channels these fish adjusted their numbers, mainly by downstream dispersal, and showed an increased growth rate. At the end of a ten week period, salmon introduced as fed parr had approximately twice the population density of salmon introduced as unfed fry. No similar difference in population density could be shown for trout. For both species, the fish introduced as fed parr had a lower mean weight after ten weeks than had the fish introduced as unfed fry. Article in Journal/Newspaper Salmo salar Wiley Online Library (via Crossref) Ecology of Freshwater Fish 5 2 68 75 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Crisp, D. T. Experimental studies on planting artificial stream channels with unfed and six weeks fed salmon ( Salmo salar L.) and trout ( S. trutta L.) fry/parr |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract– Experimental comparisons were made between release as unfed fry and release as six weeks fed parr, upon the growth and final population density of young salmon and trout over a ten week period. Salmon and trout released into experimental channels as unfed fry at densities of about 19 fish. m ‐2 showed rapid reduction in numbers, chiefly by downstream dispersal, accompanied by negligible growth. After substantial reduction in numbers, there was a reduced rate of dispersal and rapid growth. Salmon and trout retained in a hatchery at high density (80 to 200 fish. m ‐2 ) and fed for six weeks on proprietary food showed slow, but measurable, growth. After release into the channels these fish adjusted their numbers, mainly by downstream dispersal, and showed an increased growth rate. At the end of a ten week period, salmon introduced as fed parr had approximately twice the population density of salmon introduced as unfed fry. No similar difference in population density could be shown for trout. For both species, the fish introduced as fed parr had a lower mean weight after ten weeks than had the fish introduced as unfed fry. |
format |
Article in Journal/Newspaper |
author |
Crisp, D. T. |
author_facet |
Crisp, D. T. |
author_sort |
Crisp, D. T. |
title |
Experimental studies on planting artificial stream channels with unfed and six weeks fed salmon ( Salmo salar L.) and trout ( S. trutta L.) fry/parr |
title_short |
Experimental studies on planting artificial stream channels with unfed and six weeks fed salmon ( Salmo salar L.) and trout ( S. trutta L.) fry/parr |
title_full |
Experimental studies on planting artificial stream channels with unfed and six weeks fed salmon ( Salmo salar L.) and trout ( S. trutta L.) fry/parr |
title_fullStr |
Experimental studies on planting artificial stream channels with unfed and six weeks fed salmon ( Salmo salar L.) and trout ( S. trutta L.) fry/parr |
title_full_unstemmed |
Experimental studies on planting artificial stream channels with unfed and six weeks fed salmon ( Salmo salar L.) and trout ( S. trutta L.) fry/parr |
title_sort |
experimental studies on planting artificial stream channels with unfed and six weeks fed salmon ( salmo salar l.) and trout ( s. trutta l.) fry/parr |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.1111/j.1600-0633.1996.tb00038.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0633.1996.tb00038.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0633.1996.tb00038.x |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
Ecology of Freshwater Fish volume 5, issue 2, page 68-75 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1600-0633.1996.tb00038.x |
container_title |
Ecology of Freshwater Fish |
container_volume |
5 |
container_issue |
2 |
container_start_page |
68 |
op_container_end_page |
75 |
_version_ |
1784255213262077952 |