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Further investigations into selectivity and separator trawls

This report describes the most recent in a series of trials investigating the selectivity performance of separator trawls. The twin warp nets were deployed simultaneously on a twin rig trawler in the Moray Firth over a two week period. Four different cod end mesh sizes were used in a number of combinations. The catch from each of the four cod ends were identified and measured. The catch data were analysed to determine the extent of vertical separation for each species and the size selectivity of each codend. Good separation was found and some useful observations made as to the influence of fish size on separation and cod end position on selectivity. 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.

FMIG Presentation 4. Decarbonisation of the UK fishing fleet. 23 January 2024.

Skipper Hans Unkles spoke of his quiet revolution, as the u10 metre Lorna Jane becomes the first electric vessel to join the UK fishing fleet. This file may not be suitable for users of assistive technology. If needed please request an accessible format.

Separating fish from prawns in bottom trawls

The Norway lobster, Nephrops norvegicus, commonly called the “prawn”, is widely distributed around the UK and is the main species for a number of important trawl fisheries. The animals are caught by specially designed light bottom trawls with a small mesh, on grounds where the seabed usually consists of fine cohesive mud in which they excavate burrows. But in many Nephrops fisheries because of the small mesh, there can be a significant by-catch of white fish, often of undersized commercial species. This is particularly true in the Irish Sea with whiting and the Bay of Biscay with hake. It would, therefore, make a lot of sense from the point of view of conservation if, when trawling for Nephrops, this catch could be separated from the undersized fish and moreover only those fish of marketable size retained.

Twin Rig with Three Warps towed from Centre Point

Twin Rig with Three Warps towed from Centre Point.

Seafood Guide sales flyer - Mar 14

The new 2014 Seafish Seafood Guide, a comprehensive 64-page guide to fish and shellfish available in the UK. Information on species, sustainability, traceability, recipes and techniques. A great educational tool, it is available to order at a price of £5 per copy, or £2.50 per copy for orders of 50 or more.

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Further investigations into selectivity and separator trawls

FMIG Presentation 4. Decarbonisation of the UK fishing fleet. 23 January 2024.

Separating fish from prawns in bottom trawls

Twin Rig with Three Warps towed from Centre Point

Seafood Guide sales flyer - Mar 14

Seafish ACIG Aquaculture Q&A

CLG Presentation 2. Fish stock status in the North East Atlantic. 5 December 2023.

Seafish Northern Ireland Advisory Committee (SNIAC) Minutes - April 2023

SECLG Presentation 1. The role of social audits. 12 October 2023.

ACIG Presentation 2. Government and policy initiatives to support UK aquaculture. 23 November 2023.

Seafood Consumption (2023 update)

Final CLG minutes for 10 March 2015 meeting

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