Documents | Seafish

Initial Trials to Increase Acoustic Detectability of Drift Nets used in the Albacore Tuna Fishery

The drift net fishery for Albacore tuna (Thunnus alalunga) has been criticised for its alleged by-catch of small cetaceans which include dolphins. If it is possible to make a tuna drift net acoustically very detectable to dolphins then their risk of entanglement in the net is likely to be reduced. At the request of UK fishermen's organisations, Seafish and Loughborough University conducted a joint sea trial in Cornwall to examine some of the practicalities of increasing the acoustic detectability of a tuna drift net. The work concluded that it was possible to achieve an increased acoustic detectability by means of passive reflectors attached to the net, but this was at the expense of an efficient deployment of the nets and was unacceptable to fishermen. 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.

Supplement to SR324 - A study of the probable future fisher usage of the ports of Burghead, Buckie and Macduff

This report has to be read in conjunction with SR324 and provides supplementary information on how the capacity of the Buckie ice plant can be increased, how the Buckie market can be improved and the details and costs for insulation the Macduff market. 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.

Additional Material to Technical Report 236, A Study of Fresh Fish in the United Kingdon (BRS Consultancy)

The report condenses some of the material in Report 236 into a more convenient form with explanations of some of the computer print outs. 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

An investigation of the potential of the Baader 34 and 182 machines for filleting small gadoids

Large quantities of small haddock and whiting are landed in the UK. There is no efficient filleting machinery currently available for these fish, and the cost of processing them by hand is disproportionately high. Consequently their market value is low, and often they are withdrawn from sale when landings are heavy. The SFIA has been contracted by MAFF to carry out a commercial evaluation of the Baader 34 herring filleting machine, modified for blue whiting, for filleting these fish. The SFIA also undertook to investigate the new Baader 182, a filleting machine being developed for small gadoids from the now discontinued prototype Baader 121 blue whiting filleting machine. Blue whiting is a gadoid and thus is physically more similar to haddock and whiting than herring. 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

Commercial Fishing Trials of a Twin Rig Trawling System Using a Two Warp Arrangement - 'Cygnus Star'

This report describes the follow-up work resulting from initial gear handling trials of a twin-trawl system using a two-warp arrangement. The system was evaluated in a situation as near to a normal commercial fishing exercise as was possible. The exercise took place in the Nephrops fishery on the North West coast of Scotland using the MFV ‘Cygnus Star’ which spends most of its fishing time involved in this fishery. Apart from evaluating the handling of the two-warp system itself, the opportunity was taken to examine the performance of two nets rigged with rockhopper ground gears for use on hard ground. As far as we were aware, the twin-rig system has not previously been tried using rockhopper gear. The main aim of the exercise was to assess the commercial viability of operating such a system. The work carried out in this project was funded by MAFF as part of their 1987/88 Commission of Fisheries Research Projects, Code IAE16. 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.

A study of the probable future fishery usage of the ports of Burghead, Buckie and Macduff

The report identifies the present and probable future usage of the ports of Burghead, Buckie and macduff. Although relatively insignificant in national termsin fish landing these port, provided the bases for a large modern fleet with excellent and well used repair and supply facilities. Burghead is a unique all weather landing place. Motor modernisation facilities recommended for Buckie to support its performance as a shellfish processing centre. 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.

Fishing Trials to Evaluate the Relative Selectivity and Efficiency of Different Netting Yards Used in the Construction of Static Nets Used in the Fisheries for Sole and Place in the Eastern English Channel

Trials were carried out in the spring, summer and winter months of 1989 to evaluate the performance of different set net types, materials and mesh sizes in the sole and place fisheries of the Eastern English Channel. The trials were carried out from Hastings on the 10 m 70 hp 'ST RICHARD'. The results showed how the many variables can interact to affect both selectivity of these nets and their efficiency. 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.

Safety Engineering and Equipment for Fishing Vessels under 20m - Results of Trials on Two Vessels 'Madalia' and 'Silverline'

Safety within the Fishing Industry is often a subject of debate and Seafish have addressed themselves to positively improve safety by both training and, as reported here, by demonstration on ‘Example Vessels’. The concept of ‘Example Vessels’ is to take existing vessels and then to work with the crews and owners to improve the level of safety and safety awareness. Two vessels were selected, the ‘Silver Line’ and the ‘Madalia’, both being inshore trawlers based at Bridlington. Following initial sea trips on the vessel various ideas have been implemented. Some are straight forward emergency measures, such as lifelines and a rescue net. Other ideas improve the layout of working conditions on the vessel. Novel designs have been evolved, such as a slip block to make the ‘blocking up’ operation safe on side trawlers and a four section fish washer was designed by the Skipper of the Silver Line. 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.

Discard and Effort Survey: Channel ICES Areas VIId and e 1997/98 First Interim Report February 1998

This report describes the activities of the Seafish discard team during the period July-December 1997. Production of this report fulfills milestone 01/2 (31 January 1998) in the Application for a Research Contract. The project is therefore 3 weeks behind to the original plan as described in this proposal. It is not considered seriously behind schedule. A total of 10 discard trips have been undertaken of which seven have been analysed and presented in this report. These results are discussed together with the planned feasibility study of fishermen sampling their own discards.

Improved Selectivity in Towed Gears - Sea Trials to Evaluate Selectivity of Separator Trawls used to catch Mised White Fish Species

The trials described were designed to evaluate the effectiveness and investigate the selectivity aspects of a separator trawl designed to separate cod and fleetfish from other demersal roundfish species. Using a twinning arrangement, two identifcal separator trawls were towed side by side. One net rigged with small mesh codends provided selectivity data when randomly compared against two test codends (100m & 140m). 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.

Preliminary report on dover sole rearing at the hatchery of the WFA site at Hunterston (Jan 74-Feb 75)

This preliminary document reports the progress and problems of commissioning the new Dover sole hatchery, and running it for the first season. Despite delays outwith the Authority’s control nearly half the intended number of eggs was hatched. Survival to metamorphosis was considered to be normal (about 50%) but the weaning diets tried subsequently were not accepted and only 5% of the intended number of weaned fish was produced. Several shortcomings in the detail design and operation of the hatchery have been identified. Although the results of the first season are disappointing, six recommendations are made which, it is thought, should improve the chances of success in 1975. This report has been produced from a scanned original produced in February 1975 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.

The Results of a Water and Effluent Study carried out at Scotprime (Grimsby) in October 1997

In the near future new environmental legislation will add greatly to the cost and difficulty of disposing of waste water. This will present a significant problem to the fish industry. Seafish has commissioned a number of water audits in fish processing companies, looking at water usage and effluent production with a view to minimising both.

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