Publication Date:
2021-07-01
Description:
This is the first River Dart Scale Reading Investigation Report on the 1962 season by the Devon River Board. The object of this investigation is to examine, by means of scale-reading, the general biology of the salmon population of the River Dart. It reviews briefly the theory and mechanics of the scale-reading technique, the life history of the salmon, and the methods used for the collection of scales and the examination of the materials. It shows the results of the survey and the number of scales studied from each of the various sea-age classes, time of running with distribution of the sea-age groups throughout the season, fish sizes and smolt ages at migration. All are summarized in various tables and figures are also included, plotting weight distributions for each age classes and frequency distributions.
Description:
Environment Agency Archives South West
Keywords:
Fisheries
;
Limnology
;
Management
;
England
;
South West
;
River Dart
;
River fisheries
;
Freshwater fish
;
Salmon fisheries
;
Fish populations
;
Population structure
;
Population dynamics
;
Migratory species
Repository Name:
AquaDocs
Type:
monograph
Format:
application/pdf
Format:
application/pdf
Format:
22
