Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers
Many of British rivers hold stocks of salmon (Salmo salar L.) and sea trout (Salmo trutta L.) and during most of the year some of the adult fish migrate upstream to the head waters where, with the advent of winter, they will eventually spawn. For a variety of reasons, including the generation of pow...
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Ministry of Agriculture, Fisheries and Food
1984
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ftoceandocs:oai:aquadocs.org:1834/24868 2023-05-15T18:10:02+02:00 Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers Beach, M.H. 1984 application/pdf 44 http://hdl.handle.net/1834/24868 en eng Ministry of Agriculture, Fisheries and Food Lowestoft, UK http://fba.org.uk http://hdl.handle.net/1834/24868 dis@fba.org.uk http://aquaticcommons.org/id/eprint/8065 1256 2012-02-25 12:01:44 8065 Environment Agency, UK (Freshwater Biological Association) Ecology Fisheries Limnology UK River fisheries Freshwater fish Migratory species Hydraulic engineering Design Fishery management Fishways monograph 1984 ftoceandocs 2023-04-06T17:02:45Z Many of British rivers hold stocks of salmon (Salmo salar L.) and sea trout (Salmo trutta L.) and during most of the year some of the adult fish migrate upstream to the head waters where, with the advent of winter, they will eventually spawn. For a variety of reasons, including the generation of power for milling, improving navigation and measuring water flow, man has put obstacles in the way of migratory fish which have added to those already provided by nature in the shape of rapids and waterfalls. While both salmon and sea trout, particularly the former, are capable of spectacular leaps the movement of fish over man-made and natural obstacles can be helped, or even made possible, by the judicious use of fish passes. These are designed to give the fish an easier route over or round an obstacle by allowing it to overcome the water head difference in a series of stages ('pool and traverse' fish pass) or by reducing the water velocity in a sloping channel (Denil fish pass). Salmon and sea trout make their spawning runs at different flow conditions, salmon preferring much higher water flows than sea trout. Hence the design of fish passes requires an understanding of the swimming ability of fish (speed and endurance) and the effect of water temperature on this ability. Also the unique features of each site must be appreciated to enable the pass to be positioned so that its entrance is readily located. As well as salmon and sea trout, rivers often have stocks of coarse fish and eels. Coarse fish migrations are generally local in character and although some obstructions such as weirs may allow downstream passages only, they do not cause a significant problem. Eels, like salmon and sea trout, travel both up and down river during the course of their life histories. However, the climbing power of elvers is legendary and it is not normally necessary to offer them help, while adult silver eels migrate at times of high water flow when downstream movement is comparatively easy: for these reasons neither coarse fish nor eels ... Book Salmo salar IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Ecology Fisheries Limnology UK River fisheries Freshwater fish Migratory species Hydraulic engineering Design Fishery management Fishways |
spellingShingle |
Ecology Fisheries Limnology UK River fisheries Freshwater fish Migratory species Hydraulic engineering Design Fishery management Fishways Beach, M.H. Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers |
topic_facet |
Ecology Fisheries Limnology UK River fisheries Freshwater fish Migratory species Hydraulic engineering Design Fishery management Fishways |
description |
Many of British rivers hold stocks of salmon (Salmo salar L.) and sea trout (Salmo trutta L.) and during most of the year some of the adult fish migrate upstream to the head waters where, with the advent of winter, they will eventually spawn. For a variety of reasons, including the generation of power for milling, improving navigation and measuring water flow, man has put obstacles in the way of migratory fish which have added to those already provided by nature in the shape of rapids and waterfalls. While both salmon and sea trout, particularly the former, are capable of spectacular leaps the movement of fish over man-made and natural obstacles can be helped, or even made possible, by the judicious use of fish passes. These are designed to give the fish an easier route over or round an obstacle by allowing it to overcome the water head difference in a series of stages ('pool and traverse' fish pass) or by reducing the water velocity in a sloping channel (Denil fish pass). Salmon and sea trout make their spawning runs at different flow conditions, salmon preferring much higher water flows than sea trout. Hence the design of fish passes requires an understanding of the swimming ability of fish (speed and endurance) and the effect of water temperature on this ability. Also the unique features of each site must be appreciated to enable the pass to be positioned so that its entrance is readily located. As well as salmon and sea trout, rivers often have stocks of coarse fish and eels. Coarse fish migrations are generally local in character and although some obstructions such as weirs may allow downstream passages only, they do not cause a significant problem. Eels, like salmon and sea trout, travel both up and down river during the course of their life histories. However, the climbing power of elvers is legendary and it is not normally necessary to offer them help, while adult silver eels migrate at times of high water flow when downstream movement is comparatively easy: for these reasons neither coarse fish nor eels ... |
format |
Book |
author |
Beach, M.H. |
author_facet |
Beach, M.H. |
author_sort |
Beach, M.H. |
title |
Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers |
title_short |
Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers |
title_full |
Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers |
title_fullStr |
Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers |
title_full_unstemmed |
Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers |
title_sort |
fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers |
publisher |
Ministry of Agriculture, Fisheries and Food |
publishDate |
1984 |
url |
http://hdl.handle.net/1834/24868 |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
dis@fba.org.uk http://aquaticcommons.org/id/eprint/8065 1256 2012-02-25 12:01:44 8065 Environment Agency, UK (Freshwater Biological Association) |
op_relation |
http://fba.org.uk http://hdl.handle.net/1834/24868 |
_version_ |
1766182766969356288 |