Publications

Order physical posters, stickers, reports and more at the Seafish Shop.

Or search for digital publications and reports online:

Your search for returned 2443 results.

Publications & Reports

Publication InformationRelease DateFile Type

Scallop Predation by Crabs, in Relation to the Development of On-Bottom Cultivation

J.D. Paul

The feeding success of four species of crabs (Crustacea : Brachyura) which are potential predators of the scallop Pecten maximum (L) was studied under laboratory conditions. Liocarcinus depurator was the only species not to prey on scallops of 4 and 5 cm shell height, whereas Liocarcinus puber. Carcinus maenas and Cancer pagurus showed the greatest potential to prey on scallops and further experiments were carried out with this species using a wide size range of bivalve. Presented with scallops within the range 3-9 cm shell height resulted in the following trends : as prey size increased, the proportion of crabs feeding decreased, male and female crabs showed similar predatory behaviour, and marine fouling on scallop shells had no significant effect on crab feeding. These findings are discussed in relation to the potential for bottom culture of P. maximus. 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.

Download PDF

Fishing Gear Handling Trials of a Twin Rig Trawling System using a 2 Warp Arrangement

K Arkley

There has been considerable increase in the number of European fishermen adopting multi-rig trawling techniques over the past few years. Danish and Norwegian fishermen in particular have adopted twin-trawl systems, using a three warp arrangement to exploit Nephrops, shrimp and white fish fisheries. The three warp system requires the vessel to be equipped with a three barrel winch arrangement. A specification not normally found on standard trawl winches. Seafish decided to evaluate a twin-rig trawling system utilising a two warp arrangement that could be adopted by most fishing vessels equipped for normal bottom trawling operations. A rig was designed and made up and fitted aboard a 12m stern trawler fishing for Nephrops from the North East coast port of North Shields. The trials described in this report present an evaluation of the twin trawl system with regard to the handling of the rig. The trawls used in these trials were two identical nets designed by Seafish. The nets are the same ones as were used in previous trials to evaluate a double-rig system using the trhree warp arrangement. (1297 - Double Rig and Separator Trawl trials held in the Firth of Forth. 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.

Download PDF

Fishing Industry of S.W, England - A Business Study

H.D.McDiarmid, R.J.A.Nicholson

The report describes the Fishery in the S. West during 1984/1985 and is part of the series of background studies covering the U.K. Fisheries as a whole. The Fishery is broadly divided into the deep water section - typified by the Brixham and Newlyn beamers and the inshore vessels operating mainly from coves in Cornwall. The competition for the fish resouces is described but in general the fishery is enjoying some growth mainly as a result of sales to the Continent.

Download PDF

DEEPNET

MacMullen P, + others

A preliminary investigation on Shelf Edge and Deepwater Fixed Net Fisheries to the West and North of Great Britain, Ireland, around Rockall, and Hatton Bank. 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.

Download PDF

CONTROL OF SUPERSATURATION IN THE HATCHERY

Unknown - Seafish Development Aquaculture, Ardtoe

Supersaturation can occur naturally in high-energy environments e.g. from wave action or dam spillways; or as a result of excess photosynthetic activity. In the aquaculture hatchery, supersaturation can be caused by a sudden increase in temperature e.g. in long pipe runs exposed to the sun, by entrainment of air through leaking joints or pump seals, or by injection of pressurised air at depth.

Download PDF