The effects of a sand layer upon swim-up success in UK salmonids
There are two main ways in which gravel composition and changes therein arising from siltation, can influence the survival of young salmonids. First, the composition of the gravel will affect its permeability and, hence, may influence the survival of eggs and alevins through its effect upon the rate...
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Freshwater Biological Association
1988
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Online Access: | http://hdl.handle.net/1834/22742 |
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ftoceandocs:oai:aquadocs.org:1834/22742 2023-05-15T15:32:22+02:00 The effects of a sand layer upon swim-up success in UK salmonids Crisp, D.T. 1988 application/pdf 30 http://hdl.handle.net/1834/22742 en eng Freshwater Biological Association Ambleside, UK http://www.fba.org.uk WIT/TO4OO9-5/2 http://hdl.handle.net/1834/22742 http://aquaticcommons.org/id/eprint/5223 1256 2011-09-29 15:12:10 5223 Freshwater Biological Association Ecology Fisheries Limnology Rivers Fry Experimental data Water currents Fish Developmental stages Dissolved oxygen England Kielder Water Reservoir Salmo trutta Salmo salar monograph 1988 ftoceandocs 2023-04-06T17:02:13Z There are two main ways in which gravel composition and changes therein arising from siltation, can influence the survival of young salmonids. First, the composition of the gravel will affect its permeability and, hence, may influence the survival of eggs and alevins through its effect upon the rate of supply of oxygen and the rate of removal of metabolic products. Second, the composition of the gravel may affect the ease, or otherwise, of emergence at the time of swim-up and alevins may become trapped in the gravel and perish. This aspect is the main concern of the present report. Experiments were conducted to examine the effects upon fry emergence of a sand layer deposited on the gravel surface. The study concludes that fry of brown trout and Atlantic salmon emerged through layers of sand up to 8 cm thick but the percentage emergence, even from the controls with no sand, was relatively low (5 - 68%). There was no firm evidence that the experimental treatments influenced percentage emergence, timing of emergence or weight of fry at the time of emergence. Book Atlantic salmon 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 Rivers Fry Experimental data Water currents Fish Developmental stages Dissolved oxygen England Kielder Water Reservoir Salmo trutta Salmo salar |
spellingShingle |
Ecology Fisheries Limnology Rivers Fry Experimental data Water currents Fish Developmental stages Dissolved oxygen England Kielder Water Reservoir Salmo trutta Salmo salar Crisp, D.T. The effects of a sand layer upon swim-up success in UK salmonids |
topic_facet |
Ecology Fisheries Limnology Rivers Fry Experimental data Water currents Fish Developmental stages Dissolved oxygen England Kielder Water Reservoir Salmo trutta Salmo salar |
description |
There are two main ways in which gravel composition and changes therein arising from siltation, can influence the survival of young salmonids. First, the composition of the gravel will affect its permeability and, hence, may influence the survival of eggs and alevins through its effect upon the rate of supply of oxygen and the rate of removal of metabolic products. Second, the composition of the gravel may affect the ease, or otherwise, of emergence at the time of swim-up and alevins may become trapped in the gravel and perish. This aspect is the main concern of the present report. Experiments were conducted to examine the effects upon fry emergence of a sand layer deposited on the gravel surface. The study concludes that fry of brown trout and Atlantic salmon emerged through layers of sand up to 8 cm thick but the percentage emergence, even from the controls with no sand, was relatively low (5 - 68%). There was no firm evidence that the experimental treatments influenced percentage emergence, timing of emergence or weight of fry at the time of emergence. |
format |
Book |
author |
Crisp, D.T. |
author_facet |
Crisp, D.T. |
author_sort |
Crisp, D.T. |
title |
The effects of a sand layer upon swim-up success in UK salmonids |
title_short |
The effects of a sand layer upon swim-up success in UK salmonids |
title_full |
The effects of a sand layer upon swim-up success in UK salmonids |
title_fullStr |
The effects of a sand layer upon swim-up success in UK salmonids |
title_full_unstemmed |
The effects of a sand layer upon swim-up success in UK salmonids |
title_sort |
effects of a sand layer upon swim-up success in uk salmonids |
publisher |
Freshwater Biological Association |
publishDate |
1988 |
url |
http://hdl.handle.net/1834/22742 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
http://aquaticcommons.org/id/eprint/5223 1256 2011-09-29 15:12:10 5223 Freshwater Biological Association |
op_relation |
http://www.fba.org.uk WIT/TO4OO9-5/2 http://hdl.handle.net/1834/22742 |
_version_ |
1766362881858732032 |