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Scottish Marine and Freshwater Science Volume 5 Number 14: Electrofishing for Razor Clams (Ensis siliqua and E. arquatus): Effects on Survival and Recovery of Target and Non-Target Species

DescriptionTrawling and tank based trials were conducted to assess whether electrofishing (which is currently prohibited under EU regulations) for razor clams Ensis siliqua and E. arquatus affects survival and behaviour patterns in Ensis spp. and non-target species.
ISBN9781784128548
Official Print Publication Date
Website Publication DateOctober 16, 2014

Listen

Fiona Murray1, Philip Copland2, Philip Boulcott2, Mike Robertson2 and Nick Bailey2
1
Razorclam Fishermen's Forum; 2 Marine Scotland Science

ISBN 978 1 78412 854 8 (Web only publication)
PPDAS 38412
ISSN 2043 7722

This document is also available in pdf format (1.7MB)

Contents

Executive Summary

Introduction
Ensis fishery in Scotland
Fishing methods
1. Salting and hand-pulling
2. Hydraulic and Suction Dredging
3. Electro-fishing
Objectives of this study

Materials and Methods
Boat trials
Vessels and electrofishing equipment
Study areas
Experimental design
Electrical stimulus
In situ Recovery
Sandeel recovery
Physical impact of fishing gear on the seabed
Statistical analysis
Tank Trials
Electrical tests
Ensis survival and behaviour
Non-target species survival and behaviour
Statistical analysis

Results
Boat trials
Observations
Ensis species
Non-target species
Sandeels
Tank trials
Electrical tests
Ensis siliqua
Non-target species

Discussion

Conclusions

Acknowledgements

References

Appendix
Video clips
Supplementary data
Sediment Properties
Tank experiments supplementary data

Razor clams (Ensis siliqua) caught near Skye, Scotland
Razor clams (Ensis siliqua) caught near Skye, Scotland

Published by Marine Scotland Science

Marine Scotland is the directorate of the Scottish Government responsible for the integrated management of Scotland's seas. Marine Scotland Science (formerly Fisheries Research Services) provides expert scientific and technical advice on marine and fisheries issues. Scottish Marine and Freshwater Science Report is a series of reports that publish results of research and monitoring carried out by Marine Scotland Science. It also publishes the results of marine and freshwater scientific work that has been carried out for Marine Scotland under external commission. These reports are not subject to formal external peer-review.

This report presents the results of marine and freshwater scientific work carried out by Marine Scotland Science.

Marine Scotland Science
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