Design Construction and Uses of Trawal Fishing Gear By K P Biswas

Product details

Publisher ‏: Daya Publishing House
Author : K P Biswas
Language ‏: English
Edition : Latest By Publishers
Book Cover : Hard Back
ISBN : 9789351246398

Table of Content

1.volution of Trawl Fishing Gear1Parts of trawl net Webbings Square Bosom Jibs Quarters Side panels. Bellies Throat Cod end Flapper Apron Lines and ropes. Foot rope Bolch line Details of construction-Baiting and creasing. Point and Bar cutting. Mesh and bar cutting Joining of panels and take up ratio Joining ratio Mounting of netting. Hanging coefficient.Description of trawl gear: Conventions adopted in data sheets. Webbing Material Type of knot Preservation Color Twine size Breaking strength. Twine surface area. Stretched mesh Upper edge Lower edge. Depth Baiting rate. Take up. Quantity Hanging Lines and rope-Material Construction Diameter Breaking strength conventions adopted in drawings.Data and construction details: 12 m two seam fish trawl 14 m two seam fish trawl 15 m two seam fish trawl 16.5 m two seam fish trawl 20 m two seam fish trawl 24 m two seam fish trawl 24 m modified two seam fish trawl 30 m two seam fish trawl 35 m two seam fish trawl 45 m two seam fish trawl 17 m four seam shrimp trawl 18 m four seam shrimp trawl 27 m four seam shrimp trawl 28 m four seam shrimp trawl 43.6m four seam shrimp trawl.Otter boards: Flat otter board 120 kg for 28 m shrimp trawl. Oval flat otter board 50-55 kg for 42-56 HP trawlers. Oval flat otter board 150 kg for 153-200 HP trawlers Oval flat otter board 180-190 kg for 200 HP trawlers. Oval flat otter board 250 kg for 240-300 HP trawlers Otter trawl accessories- Floats Sinkers Pennants Bridles Trawl warps Bobbins Tickler chain Knotless webbing Preservation of nets.2.General Principles of the Design of the Trawl Gear51Classification of trawl net. Parts of trawl Net Trawl net design and development Developing conventional otter trawl net Size of trawl gear matching to engine horse power Design features of trawl operating in Gulf of Mannar-Fish trawl and Coastal shrimp trawl.3.Working Principles and Performances of Trawl Nets82Instrumentation Telemetering instruments. Continuous multi-channel data acquisition system. Data processing with the help of computer.4.Trawl Net Design and Development85Development and trial of bulged belly and Six seam trawl net. Details of 25 m bulged belly trawl. Large mesh high opening fish trawl. Belly depth studies of shrimp trawl Six seam otter trawl Three panel double trawl net Overhang for trawls.5. Mid Water Trawl One Boat Mid Water Trawl97One boat mid-water trawl. Features Babylon Construction Hanging Rectangular mid-water trawl Oneboat mid water trawling trials in SW coast of India One boat trawl for pelagic stocks 10.5 m mid-water trawl Pair trawling-fishing gear rigging operation.6.Bottom Trawl Large Meshed Bottom Trawl111Large mesh bottom trawl Design criteria of bottom trawl for 16.5 m steel trawlers. Bottom trawl trials off Tamil Nadu Design diagram and Bottom