An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991
1000 log books were issued to anglers of which 236 were returned, those from the rivers Derwent, Kent, Lune and Ribble accounted for the vast majority. The Derwent had the highest catch rate of these rivers: one salmon every 13.89 hours followed by the Lune, Kent and Ribble at 16.39, 18.87 and 35.71...
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National Rivers Authority North West
1993
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ftoceandocs:oai:aquadocs.org:1834/24884 2023-05-15T18:09:59+02:00 An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991 Aprahamian , M.W. 1993-04 application/pdf 89 http://hdl.handle.net/1834/24884 en eng National Rivers Authority North West Warrington, UK http://fba.org.uk http://hdl.handle.net/1834/24884 dis@fba.org.uk http://aquaticcommons.org/id/eprint/8082 1256 2012-03-01 17:34:44 8082 Environment Agency, UK (Freshwater Biological Association) Fisheries Limnology England Rivers Logbooks Salmo salar Salmo trutta Salmon fisheries Catch statistics Catch/effort Weight River fisheries monograph 1993 ftoceandocs 2023-04-06T17:02:45Z 1000 log books were issued to anglers of which 236 were returned, those from the rivers Derwent, Kent, Lune and Ribble accounted for the vast majority. The Derwent had the highest catch rate of these rivers: one salmon every 13.89 hours followed by the Lune, Kent and Ribble at 16.39, 18.87 and 35.71 hours, respectively. For sea trout the Lune, Derwent and Ribble had a catch rate of approximately one fish every 10.0 hours (9.8, 10.0 and 10.64 hours),and for the Kent one fish per 16.1 hours fished. Salmon angling visits were, in general,longer than those for sea trout being between 2 and 6 hours as opposed to 2 to 4 hours. On the majority of visits (>80%) no fish were caught and was the same for salmon and sea trout. For salmon the majority of fish were caught on fly, spinner or worm, and the least on prawn. For sea trout fly predominated. The majority of salmon caught were less than 91b in weight and were presumed to be grilse (1 sea winter). The majority of the sea trout caught weighed between 1 and 31b. The pattern of catch, effort, CPUE, abundance and catchability for salmon and sea trout were modelled using the data from the rivers Derwent, Kent and Lune. Flow significantly influenced catch, effort and catchability of salmon which had entered in a particular month. For sea trout flow was not significantly correlated with any of the dependent variables. The catchability coefficient for salmon, determined from the total number of fish, remained relatively constant over the period June to October indicating that CPUE was a reasonable measure of within season abundance. This was not found to be the case for sea trout. Environment Agency Archives North West 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 |
Fisheries Limnology England Rivers Logbooks Salmo salar Salmo trutta Salmon fisheries Catch statistics Catch/effort Weight River fisheries |
spellingShingle |
Fisheries Limnology England Rivers Logbooks Salmo salar Salmo trutta Salmon fisheries Catch statistics Catch/effort Weight River fisheries Aprahamian , M.W. An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991 |
topic_facet |
Fisheries Limnology England Rivers Logbooks Salmo salar Salmo trutta Salmon fisheries Catch statistics Catch/effort Weight River fisheries |
description |
1000 log books were issued to anglers of which 236 were returned, those from the rivers Derwent, Kent, Lune and Ribble accounted for the vast majority. The Derwent had the highest catch rate of these rivers: one salmon every 13.89 hours followed by the Lune, Kent and Ribble at 16.39, 18.87 and 35.71 hours, respectively. For sea trout the Lune, Derwent and Ribble had a catch rate of approximately one fish every 10.0 hours (9.8, 10.0 and 10.64 hours),and for the Kent one fish per 16.1 hours fished. Salmon angling visits were, in general,longer than those for sea trout being between 2 and 6 hours as opposed to 2 to 4 hours. On the majority of visits (>80%) no fish were caught and was the same for salmon and sea trout. For salmon the majority of fish were caught on fly, spinner or worm, and the least on prawn. For sea trout fly predominated. The majority of salmon caught were less than 91b in weight and were presumed to be grilse (1 sea winter). The majority of the sea trout caught weighed between 1 and 31b. The pattern of catch, effort, CPUE, abundance and catchability for salmon and sea trout were modelled using the data from the rivers Derwent, Kent and Lune. Flow significantly influenced catch, effort and catchability of salmon which had entered in a particular month. For sea trout flow was not significantly correlated with any of the dependent variables. The catchability coefficient for salmon, determined from the total number of fish, remained relatively constant over the period June to October indicating that CPUE was a reasonable measure of within season abundance. This was not found to be the case for sea trout. Environment Agency Archives North West |
format |
Book |
author |
Aprahamian , M.W. |
author_facet |
Aprahamian , M.W. |
author_sort |
Aprahamian , M.W. |
title |
An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991 |
title_short |
An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991 |
title_full |
An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991 |
title_fullStr |
An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991 |
title_full_unstemmed |
An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991 |
title_sort |
analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991 |
publisher |
National Rivers Authority North West |
publishDate |
1993 |
url |
http://hdl.handle.net/1834/24884 |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
dis@fba.org.uk http://aquaticcommons.org/id/eprint/8082 1256 2012-03-01 17:34:44 8082 Environment Agency, UK (Freshwater Biological Association) |
op_relation |
http://fba.org.uk http://hdl.handle.net/1834/24884 |
_version_ |
1766182702435794944 |