An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991.
National Rivers Authority North West,
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
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
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.
Monograph or Serial Issue
||An analysis of migratory salmonid catch effort data, derived from anglers' log books, 1991
|Number of Pages:
||National Rivers Authority North West
|Place of Publication:
||Environment Agency Archives North West
|Contact Email Address:
||Environment Agency, UK (Freshwater Biological Association)
||England; Rivers; Logbooks; Salmo salar; Salmo trutta; Salmon fisheries; Catch statistics; Catch/effort; Weight; River fisheries
Hardy B Schwamm
||01 Mar 2012 17:34
||01 Mar 2012 17:34
Actions (login required)