Course Objectives

To study about different fishing gear operation in relation to target species and specific water bodies

To study about deck fitting equipments on craft used for fish harvesting

To study about different fish finding equipments

CO-PO Mapping

PO1: Knowledge enhancement

PO2: Professional and Entrepreneurial Skill development

PO5: Environment and Sustainability

Course Syllabus

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

Session 1

1. Structure of various commercial fishing gears.
Structure of various commercial fishing gears

Common Gear

Common fishing methods

Session 2

2. Otter door: Different types of otter doors. Behavior of otter doors in water: Angle of attack, angle of heel and angle of tilt.

Otterboards- types and functions

trawl door setup

Session 3

3. Fishing accessories
fishing assessories

Flip-up rigs for trawl

Roller-Ball on beam trawl

Session 4

4. Trawling: Beam trawling; otter trawling; side trawling; twin trawling out rig trawling bull trawling and mid water trawling

Trawling

Beam trawling
Bottom trawling
Triple sole rig trawling

Trawl ground gear set up

Session 5

5. Constructional details of single boat purse seine; two boat purse seine and method of operation.
Purse seine

Purse seine
NOAA Purse seine

purse seine
Purse seine-1
purse seine with two boats

Session 6

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

Gill netting
Gill netting
Drift gill net

Session 7

7. Line fishing:
Design, Operation of Long lines

Small Scale Tuna Longlining

Session 8

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

Selectivity of fishing gear

Ring seine CIFT
Beach Seine

Session 9

9. Deck equipments – types of winches, net haulers, line haulers, triple drum, gurdy, power blocks, fish pumps.
Deck requirements
Marine deck requirement

automatic net haulers

Automatic catch hauler

Session 10

10. Fishing equipment: Fish finder, GPS navigator, sonar, net sonde, gear monitoring equipment.
Electronic equipments for fishing

Fish Aggregrating Device
FADS
Sonar for Fishing

Question Bank

Click on the link for model question Fishing Technology

Model Question Fishing Technology

Assignment topics

Commercial fishing gears employed in Indian Waters
Different types of otter doors
Fishing accessories with reference to trawl net

Deck layout of different trawler.

Constructional details of single boat purse seine; two boat purse seine and method of operation.
Types of gill net – constructional and operation.
Line fishing: Types of hooks; structure and size of hooks.

Selectivity in fishing gear and by catch reducing devices.
Deck equipments
Fishing equipment