An Analysis of the Gravels used by Spawning Salmonids in Ireland
Samples of gravel from 79 sites selected for spawning by Atlantic salmon, 9 selected by sea trout and 13 within spawning areas but known to be unused by spawning salmonids were analysed. For comparison reported data on 81 samples from sites used by Pacific salmon were similarly analysed. No signific...
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Department of Agriculture and Fisheries [Fisheries Division]
1989
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Online Access: | http://hdl.handle.net/10793/401 |
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ftmarineinst:oai:oar.marine.ie:10793/401 2023-05-15T15:31:09+02:00 An Analysis of the Gravels used by Spawning Salmonids in Ireland Fluskey, R. D. 1989 http://hdl.handle.net/10793/401 en eng Department of Agriculture and Fisheries [Fisheries Division] Irish Fisheries Investigations Series A;32 Fluskey, R.D., "An Analysis of the Gravels used by Spawning Salmonids in Ireland", Department of Agriculture and Fisheries [Fisheries Division] 0578-7327 http://hdl.handle.net/10793/401 Gravels Spawning Salmonids Monograph 1989 ftmarineinst 2022-07-27T09:39:04Z Samples of gravel from 79 sites selected for spawning by Atlantic salmon, 9 selected by sea trout and 13 within spawning areas but known to be unused by spawning salmonids were analysed. For comparison reported data on 81 samples from sites used by Pacific salmon were similarly analysed. No significant difference was found between the range of gravel distributions used by salmon and that used by sea trout. It could not be proved that the sites unused by spawning fish were avoided because of excess coarseness or fineness. The range used by Pacific salmon was found to be wider than that used by Atlantic salmon. A separate analysis was made of the portion of gravel coarser than 4mm in diameter. From this a suitable mixture for use in rehabilitating disrupted spawning areas is proposed. A proposal is made that for spawning gravel analysis the 0scale where 0 = -1.log2 particle size be replaced by a 0 scale where the multiplication by -1 is omitted. Key words: Salmonids, spawning, gravel, site selection. Book Atlantic salmon Marine Institute Open Access Repository Pacific |
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Marine Institute Open Access Repository |
op_collection_id |
ftmarineinst |
language |
English |
topic |
Gravels Spawning Salmonids |
spellingShingle |
Gravels Spawning Salmonids Fluskey, R. D. An Analysis of the Gravels used by Spawning Salmonids in Ireland |
topic_facet |
Gravels Spawning Salmonids |
description |
Samples of gravel from 79 sites selected for spawning by Atlantic salmon, 9 selected by sea trout and 13 within spawning areas but known to be unused by spawning salmonids were analysed. For comparison reported data on 81 samples from sites used by Pacific salmon were similarly analysed. No significant difference was found between the range of gravel distributions used by salmon and that used by sea trout. It could not be proved that the sites unused by spawning fish were avoided because of excess coarseness or fineness. The range used by Pacific salmon was found to be wider than that used by Atlantic salmon. A separate analysis was made of the portion of gravel coarser than 4mm in diameter. From this a suitable mixture for use in rehabilitating disrupted spawning areas is proposed. A proposal is made that for spawning gravel analysis the 0scale where 0 = -1.log2 particle size be replaced by a 0 scale where the multiplication by -1 is omitted. Key words: Salmonids, spawning, gravel, site selection. |
format |
Book |
author |
Fluskey, R. D. |
author_facet |
Fluskey, R. D. |
author_sort |
Fluskey, R. D. |
title |
An Analysis of the Gravels used by Spawning Salmonids in Ireland |
title_short |
An Analysis of the Gravels used by Spawning Salmonids in Ireland |
title_full |
An Analysis of the Gravels used by Spawning Salmonids in Ireland |
title_fullStr |
An Analysis of the Gravels used by Spawning Salmonids in Ireland |
title_full_unstemmed |
An Analysis of the Gravels used by Spawning Salmonids in Ireland |
title_sort |
analysis of the gravels used by spawning salmonids in ireland |
publisher |
Department of Agriculture and Fisheries [Fisheries Division] |
publishDate |
1989 |
url |
http://hdl.handle.net/10793/401 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
Irish Fisheries Investigations Series A;32 Fluskey, R.D., "An Analysis of the Gravels used by Spawning Salmonids in Ireland", Department of Agriculture and Fisheries [Fisheries Division] 0578-7327 http://hdl.handle.net/10793/401 |
_version_ |
1766361641700556800 |