Contract awarded for This tender is seeking a 12-15m twin-rig trawler with skipper who can demonstrate extensive knowledge and experience of the sw otter trawl
This study assessed the spatial variation across four fishing grounds in the composition of bycatch of an otter trawl
scallop (Aequipecten opercularis) fishery in the Irish Sea.
9 320 Otter trawl
Family/Species N CPUE RA O TL Acipenseridae Shovelnose sturgeon Scaphirhynchus platorynchus 67 2.
The following technical characteristics of the fishing equipment used by the fleet were considered for the purpose of drawing the respective designs: (1) material, diameter and length of the ropes; (2) material, chemical treatment, twine diameter, size and quantity of meshes in the upper and lower edges of the panels, fall and cutting rate (for each panel of the net); and (3) materials and arrangement of the gear rigging (length, diameter and weight of the warps and the bridles, sinkers, floaters and otter trawl
doors, indicating the arrangement of the chains of the towing system).
A demersal species, it has yet to be taken in either of the four completed summer regional otter trawl
surveys conducted by the Southern California Coastal Water Research Project (E.
All fish were collected using an otter trawl
that measured 20m wide and 9m high at the mouth, 24m in length, with a stretched mesh size of 3cm and cod mesh of 1.
Based on several tows in this area, investigators made the following observation: "Evidently huge beds of moulting females are mating with the males at this time of the year, and they are massed together in such a manner as to make them easy prey for a type of gear like the otter trawl
, which scrapes along the bottom" (FWS, 1942: p.
Sampling methods included otter trawl
, gill net, and rotenone.
The bottom of an otter trawl
mouth is a rope that can bear heavy steel weights (bobbins) which keep the trawl on the seabed.
Specimen size ranges from microscopic plankton drawn from the ocean using a plankton net to larger fish like the horn shark, caught in the otter trawl
The gear used was a typical shrimp otter trawl
measuring 11 m (length) x 5.
Combined, the sink gillnet (SGN) and otter trawl
(OT) fisheries accounted for the majority of spiny dogfish catch (autumn: 85%; spring: 92%), either retained (SGN) or discarded (OT).