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://aquaticcommons.org/5223/ http://aquaticcommons.org/5223/1/1988_cris_the.pdf |
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ftaquaticcommons:oai:generic.eprints.org:5223 2023-05-15T15:32:20+02:00 The effects of a sand layer upon swim-up success in UK salmonids Crisp, D.T. 1988 application/pdf http://aquaticcommons.org/5223/ http://aquaticcommons.org/5223/1/1988_cris_the.pdf en eng Freshwater Biological Association http://aquaticcommons.org/5223/1/1988_cris_the.pdf Crisp, D.T. (1988) The effects of a sand layer upon swim-up success in UK salmonids. Ambleside, UK, Freshwater Biological Association, 30pp. (WIT/TO4OO9-5/2). Ecology Fisheries Limnology Monograph or Serial Issue NonPeerReviewed 1988 ftaquaticcommons 2020-02-27T09:21:25Z 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 International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons |
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Open Polar |
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International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons |
op_collection_id |
ftaquaticcommons |
language |
English |
topic |
Ecology Fisheries Limnology |
spellingShingle |
Ecology Fisheries Limnology Crisp, D.T. The effects of a sand layer upon swim-up success in UK salmonids |
topic_facet |
Ecology Fisheries Limnology |
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://aquaticcommons.org/5223/ http://aquaticcommons.org/5223/1/1988_cris_the.pdf |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
http://aquaticcommons.org/5223/1/1988_cris_the.pdf Crisp, D.T. (1988) The effects of a sand layer upon swim-up success in UK salmonids. Ambleside, UK, Freshwater Biological Association, 30pp. (WIT/TO4OO9-5/2). |
_version_ |
1766362848420691968 |