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To study about different fishing gear operation in relation to target species and specific water bodies
1. Students will be familiar with specifc gear and craft is used for a target species in a specific water
2. Selectivity of the gear
Theory
1. Structure of various commercial fishing gears.
2. Otter door: Different types of otter doors. Behavior of otter doors in water: Angle of attack, angle of heel and angle of tilt.
3. Fishing accessories – thimbles, shackles, C-links, rings, G-links, Kelly’s eye, stopper, bottle screw, Deck layout of different fishing vessels. Rigging of fishing gears: Bridles, sweep lines, otter boards, floats and ground gears arrangements.
4. Trawling: Beam trawling; otter trawling; side trawling; twin trawling out rig trawling bull trawling and mid water trawling.
5. Constructional details of single boat purse seine; two boat purse seine and method of operation.
6. Types of gill net – constructional details of simple gill net, trammel gill net, stick held gillnet, frame gillnet and vertical line gillnet, Operation of gillnet: set gillnetting; drift gillnetting; bottom , mid water and pelagic gillnetting.
7. Line fishing: Types of hooks; structure and size of hooks. Constructional details of long line, tuna long line, vertical long line, pole & line and trolling line. Operation of long line: set and drift long lining: bottom, mid water and pelagic long lining; jigging.
8. Operation of beach seine, boat seine and traps. Selectivity in fishing gear and by catch reducing devices.
9. Deck equipments – types of winches, net haulers, line haulers, triple drum, gurdy, power blocks, fish pumps.
10. Fishing equipment: Fish finder, GPS navigator, sonar, net sonde, gear monitoring equipment.
Practicals:
1. Survey of fishing gears; Trawl; gillnet; long line and purse seine fishing gears.
2. Rigging of trawl, purse seine, gillnet and hook & line.
3. Commercial fishing techniques: Bottom trawling;
4. purse seining;
5. gillnetting and
6. Line fishing.
7. Cast net fishing and
8. Trap fishing.
Suggested Books
1. Fishing Gear and Craft Technology by Y Sreekrishna and Latha Shenoy
2. Handbook of Aquaculture by I.C.A.R
Session Plan
1. Structure of various commercial fishing gears.
Structure of various commercial fishing gears
2. Otter door: Different types of otter doors. Behavior of otter doors in water: Angle of attack, angle of heel and angle of tilt.
4. Trawling: Beam trawling; otter trawling; side trawling; twin trawling out rig trawling bull trawling and mid water trawling
5. Constructional details of single boat purse seine; two boat purse seine and method of operation.
Purse seine
6. Types of gill net – constructional details of simple gill net, trammel gill net, stick held gillnet, frame gillnet and vertical line gillnet, Operation of gillnet: set gillnetting; drift gillnetting; bottom , mid water and pelagic gillnetting.
Gill net
Gill nets and their operation
8. Operation of beach seine, boat seine and traps. Selectivity in fishing gear and by catch reducing devices.
Ring Seine, Shore Seine, Boat Seine, Stake Nets, and Dip Nets
9. Deck equipments – types of winches, net haulers, line haulers, triple drum, gurdy, power blocks, fish pumps.
Deck requirements
Marine deck requirement
10. Fishing equipment: Fish finder, GPS navigator, sonar, net sonde, gear monitoring equipment.
Electronic equipments for fishing
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