Documents | Seafish

Static Fishing Nets - Experiments to reduce unwanted bycatch and bottom debris

In August 1987, Seafish carried out sea trials to assess the efficiency of trammel nets constructed of a number of alternative materials IR1341 refers. One of the main objectives of the work was to assess the effectiveness of monofilament nylon used in the construction of trammel nets with the aim of reducing net clearing time by making it more easy to remove crabs and bottom debris.

A Business Study of the Fish Industry at Grimsby

In 1981 the SFIA undertook a comprehensive study of the Fish Industry in Grimsby (Report M & D No. 470). As with all studies of this type, the circumstances change rapidly and any report must be subjected to review from time to time. Currently, the fish industries of both Hull and Grimsby are under study by a team of consultants who have the task of identifying projects which might be eligible for EEC funding. This study in turn is part of an integrated regional study of all the major industries on both sides of the River Humber which has the aim of assessing the long term development prospects for the Industry. The Report M & D 470 has been used as a source document by many organisations, including the two consulting firms, and in order to avoid any misleading information, the SFIA in response to a request from the Grimsby town Council, agreed to bring the Report up to date. This document, is therefore, based on the current state of the Grimsby fish Industry in February 1984. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish

Mussel Purification - Repeated Re-use of Artificial Seawater in the Purification Process

To make large scale mussel purification more cost effective and to improve its control, Seafish has considered the development of a modular, multi layered purification tank utilising re-cycled artificial seawater. Having already demonstrated that a multi-layered system would work, as described in TR 312, Seafish has now conducted trials with artificial seawater as part of the 1987-88 MAFF Research Commission, Project NBA16. This report describes a series of comparative trials conducted at the Seafish Industrial Development Unit, Hull, using two identical purification tanks to purify mussels. In each trial one tank was filled with freshly prepared artificial seawater and the other with an artificial seawater mix composed of 90% re-used and 10% freshly prepared. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish.

Water Usage and Effluent in the Fish Industry

With the privatisation of water authorities in the UK and the implications of the EC Directives on Waste Water, processors are facing considerable increases in overheads. This paper reviews the implications of the roles and makes tentative suggestions as to how costs can be checked. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish.

Development of a strategy for British Fishing Ports

Little has happened in British port development in the last 50 years. The Fleck Committee Report in 1961 painted a picture of the fishing industry which, in many ports, prevails today. The Common Fisheries Policy, whilst limiting the opportunities for British registered vessels, does at least provide a clear picture of the opportunities in the foreseeable future. With this in mind, there are grants available from national and EEC sources and the opportunity exists to improve our ports. The urgency of the situation is demonstrated by the trend on the Continent to develop specialist ports which can efficiently land and service any vessels and which could set out to capture business from all EC fleets, including the UK. The UK has many advantages, not least of which are the foreign fleets operating near to the UK coast and huge domestic market for fish. Those ports willing to adapt and welcome this trade can do well. Nevertheless, the UK probably has too much port capacity and many ports which were formerly major ports, are now not best suited for re-development. Other ports which by chance are well located can be encouraged to expand provided reasonable financial projections are made. There will always be a role for the smaller or minor port to serve local fleets and these, too, should be encouraged to develop but with a view to maximising revenue from all possible sources, including combining fishing and leisure activities. The paper concludes with a methodology for carrying out port studies which is the procedure adopted by Seafish in their Regional Development Programme. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish.

Phase One Development Sutten Harbour Company - Fish market and Insra Structure

Sutton Harbour Company plan to develop harbour facilities to improve landing and berthage of vessels and to create a modern service structure essential to the requirements of both local and visiting vessels and to primary processing and marketing of fish and shellfish. Existing facilities are inadequate, unreliable, antiquated, unhygienic and poorly sited. In essence the plan is to relocate the fish market, merchanting and service related activities to the eastern side of the harbour where better access and greater availability of space will allow for sensible development to the benefit of all sectors of the fish industry. Detail of existing port services, the local fleet, fish landings and resource opportunities is provided in Sea Fish Industry Authority Technical Report Number 320, September 1987. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish.

Artificial Dosing of Bivalve Molluscs with E. Coli for the Testing of Purification Tanks

In England and Wales the purification of bivalve molluscs in purpose built tanks requires a bacteriological test as part of the approval procedure to demonstrate satisfactory operation. Using the bacteria Eschericia coli (E. coli) as an indicator of faecal pollution, initial high levels in bivalve molluscs placed in a tank must reduce to below prescribed levels within 42 hours. Problems with obtaining naturally or artificially contaminated bivalve molluscs with sufficiently high levels of E. coli have resulted at times in considerable cost and inconvenience. The main problem with artificial dosing being the unpredictability associated with attempting to dose all bivalve molluscs in the purification tank at once. MAFF and Seafish considered that a new approach might be to dose only a small quantity in a separate tank and place these molluscs at defined sampling points in the purification tank instead. Trials were first conducted by MAFF at their Weymouth Laboratory with the use of freeze dried ampoules containing a know titre of E. coli to dose bivalve molluscs in a small portable purification tank developed by Seafish. By using this tank it was possible to control tank operating conditions and therefore have more control over the uptake of E. coli by bivalve molluscs immersed in it. The results for mussels were reasonably consistent, with more variability shown with oysters. Nevertheless it was shown that these species could be dosed to the required levels. A standard protocol was, therefore, developed for artificial dosing using this technique. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish.

Flume Tank Tests on Three Trawl Models (Model Full Scale Correlation)

This report describes Flume Tank trials carried out on three trawl models. The work was undertaken by the Gear Technology group of Seafish Technology under the MAFF R&D Commission 1991/92, Project Reference IAA16(MAFF), GT1 (Seafish). These trials form part of an ongoing project to correlate the performance of trawl models to their full scale counterpartas. The trawl system which is modelled has several comnponents each of which may behave differently when scaled from full scale to model, using the usual scaling rules: net, ground gear, bridles, doors, warps.

An Investigation into the Landings, Value and Storage Properties of Ungutted White Fish

This paper summarises the work into one aspect or quality control at sea, namely the practices of gutting or not gutting. The investigation has considered previous research into the subject and carried out further research to support earlier findings and to close some of the gaps. It will be stressed throughout this work that of paramount importance in quality control at sea is the need to transfer the catch as speedily as possible into melting ice in order to reduce the temperature. All other considerations including gutting become of second order importance if this one action is taken properly. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish.

Exploratory Fishing Trials for Nephrops norvegicus in the Sea Areas around St. Kilda

This report presents the results in terms of fishing locations and catch composition of two exploratory voyages undertaken in September 1996 in order to assess the viability of trawling for Nephrops norvegicus in the waters around St. Kilda. Catch per effort of Nephrops was very low and it was concluded that the voyages could not be regarded as viable targeted Nephrops voyages. The results are discussed in the context of current fisheries legislation and known features of the Nephrops life cycle. It was suggested that Nephrops could be more available earlier in the year and that any future investigations should be carried out at intervals over the summer. There may also be benefit in investigation of the available information on hydrography, seabed type and Nephrops life cycle.

Feasibility study on the ongrowing potential for periwinkles Littorina littorea L..

Growth rates on different dietary regimes were measured at differing stock density. Large individual growth rates were found, possibly relating to sexual development. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish.

Study Tour to Spain 16-21 May 1994

The report describes a visit to N. Spanish ports by a delegation from the UK fishing industry led and organised by Seafish. The objective of the visit was to gain a better understanding of the Spanish fishing industry and its problems. Meetings were held with the principal fishing representatives in the area. This report has been produced from a scanned original and may therefore contain some formatting and other inaccuracies. In cases where this affects the technical content, a paper copy of the original report can still be obtained from Seafish.

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