MINISTRY OF AGRICULTURE, FISHERIES AND FOOD

DIRECTORATE OF FISHERIES RESEARCH

SHELLFISH NEWS

NUMBER 1

MAY 1996

LOWESTOFT

1996

'SHELLFISH NEWS' is published twice yearly as a service to the British shellfish farming and harvesting industry.

*Copies are available free, on request to the editor.

*Articles, news and comment relating to shellfish farming and harvesting are welcomed and should be sent to the editor for publishing in future issues.

*The views expressed in this issue are those of the contributors and are not necessarily the views of the editors or of DFR. The editors reserve the right to edit articles or other contributions.

Editor: Ian Laing

DFR Fisheries Laboratory

Benarth Road

Conwy

LL32 8UB

Tel: 01492 593883 (Fax: 592123)

Assistant Editor: Denis Glasscock

DFR Fisheries Laboratory

Pakefield Road

Lowestoft

Suffolk

NR33 OHT

Tel: 01502 562244 (Fax: 513865)

CONTENTS

WELCOME TO SHELLFISH NEWS

Articles

Hatchery production of King scallop seed by Sue Utting ..........................................................................................................

Bivalve molluscs and public health

Page 7

David Lees.................................................................12

News from the Shellfish Resource Group, Lowestoft ................19

News from the Trade Associations

SAGB (by Eric Edwards) ................................................22

ASSG (by Jim Buchanan) ...............................................23

Reports from recent meetings

Oyster Growers Workshop ...............................................25

SFCs/MAFF Cockle and Mussel Working Groups...................26

Conservation Report

Study of the effects of potting on the benthos.... Policy Matters..... 27

Link.Aquaculture - A programme for collaborative R&D and technology transfer.......................................................... 28

New monitoring programmes for algal biotoxins in relation to shellfisheries ..................................................................29

Further measures to protect native crayfish............................... 31

Research News...............................................................32

Shellfish production in the UK in 1994 ...................................36

Shellfish in the Press ........................................................39

HATCHERY PRODUCTION OF KING SCALLOP SEED

by Dr. Sue Utting, DFR Fisheries Laboratory,

Benarth Road, Conwy, UK, LL32 8UB.

This article describes some of the research being carried out at the DFR Fisheries Laboratory, Conwy on techniques for producing scallop (Pecten maximus) seed in the hatchery. Historically, the Conwy Laboratory has been involved with developing and modifying techniques for the hatchery production of a wide range of bivalve mollusc species, including native and pacific oysters, and Manila clams.

Lobster stock enhancement

Sixteen years ago, MAFF scientists at Conwy and Lowestoft started a joint venture to rear, tag, and release juvenile lobsters, and to recapture them later from the fishery. The MAFF experiment was undertaken in Bridlington Bay, East Yorkshire, and parallel projects were undertaken off Aberystwyth (North Western and North Wales SFC) and in Ardtoe and Orkney in Scotland (Sea Fish Industry Authority). A description of the work, and of how the 1,470 adult recaptures were obtained from the 91,000 juvenile lobsters released, is given in a colour brochure entitled:

'LOBSTER STOCKING: Progress and Potential. Significant results from the UK lobster restocking studies 1982 to 1995', available from the Fisheries Laboratory, Lowestoft.

A video entitled 'Lobster Stock Enhancement Investigations 1983-1993' can also be purchased from the Fisheries laboratory, Conwy.

The main thrust in applying the results of these experiments to the real world is coming at present from the Sea Fisheries Committees, and proposals for the establishment of lobster hatcheries, and the development of restocking programmes in coastal waters, are currently being developed in Cornwall, Devon and South Wales. In Scotland, the most immediate progress is likely to be in Orkney. It is hoped to feature these developments in more detail in a future edition of Shellfish News.

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