Sea trout (Salmo trutta L.) : studies of the River Twyi, South Wales

Evans, Dafydd Martin

Aquaculture; Fisheries; Zoology
July 1994

Thesis or dissertation


Rights
© 1994 Dafydd Martin Evans. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder.
Abstract

The biological characteristics of the adult sea trout stock in the River Tywi were examined between 1988 and 1992 by sampling catches from a temporary main-river trap, and the commercial seine, commercial coracle and recreational rod fisheries. Radio tracking of adults during the spawning season investigated behavioural activities and their possible effects on stock characteristics. Catch effort data from angler log books assessed the annual performance of the rod fishery between 1990 and 1993. The effects of ameliorating the impact of acidification on water quality, benthic macro-invertebrates and juvenile salmonids, through reservoir liming, was studied.

Publisher
Department of Applied Biology, The University of Hull
Supervisor
Clarke, D. R. K.; Cowx, I. G. (Ian G.)
Qualification level
Doctoral
Qualification name
PhD
Language
English
Extent
Filesize: 49,676KB
Identifier
hull:3482
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