Fish Traps and Barricades Overview

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Questions and Answers

What material compositions are primarily used for fish barricades?

Natural fibers and plastics

Nets and tarpaulin

Bamboo and chicken wire

Various non-textile materials (correct)

Which type of fishing line is specifically designed to be worked by jerking up and down under a light?

Jigger lines (correct)

Drift long lines

Simple hand lines

Troll lines

Which characteristic distinguishes set-impounding nets from other types of nets?

They can only be used in freshwater.

They are always floating on the surface.

They capture fish by straining water. (correct)

They are conical in shape.

What is the primary purpose of fish corrals?

To guide fish during migration Signup and view all the answers

What type of hook arrangement does a multiple hand line utilize?

Many hooks arranged vertically on one line Signup and view all the answers

What defines a drift long line in fishing?

It remains unattached and drifts with the current. Signup and view all the answers

Which of the following statements best describes handlines?

They consist of a line with hooks attached. Signup and view all the answers

What distinguishes crab pots from other fishing traps mentioned?

They capture creatures by confining them in an area. Signup and view all the answers

Which of the following types of nets includes wings as part of its structure?

Fyke nets Signup and view all the answers

What is a characteristic feature of lift nets in fishing?

They rely on a vertical lifting motion. Signup and view all the answers

Which type of seine net is specifically designed for use in reef areas?

Reef seines Signup and view all the answers

What distinguishes purse seines from other types of seines?

They include a pursing device at one end. Signup and view all the answers

Which type of mobile impounding net is specifically operated by hand?

Dip nets Signup and view all the answers

Which net type is characterized by its conical or cubical shape and operates with the aid of light?

Bag nets Signup and view all the answers

What are stop seines primarily used for in fishing?

To enclose and capture fish. Signup and view all the answers

Which type of net involves a forward horizontal motion for capturing fish?

Push nets Signup and view all the answers

What is a common characteristic of drift nets in commercial fishing?

They can have lengths of up to 40 kilometers. Signup and view all the answers

Which of the following correctly describes the function of traps in fishing?

They discourage escape with labyrinths and retarding devices. Signup and view all the answers

Which method is NOT typically associated with hooks and lines in fishing?

Immobilizing fish by wounding with spears. Signup and view all the answers

In constructing fish corals, what structural feature is most critical for ensuring that fish cannot escape?

Labyrinths or constrictions to limit movement. Signup and view all the answers

What is the primary operational method used in drag net fishing?

Dragging nets through the water to encircle fish. Signup and view all the answers

What characteristic differentiates handlines from other fishing methods?

They involve a single line with hooks attached. Signup and view all the answers

Which of the following is NOT a type of barrier commonly used in fishing?

Scoops Signup and view all the answers

Which gear is primarily used to immobilize fish by wounding them?

Grappling and wounding gear Signup and view all the answers

Study Notes

Fishing Gears Overview

Barricades are non-textile barriers that prevent fish escape, primarily in migration routes.
Fish corrals use bamboo, brush, or chicken wire to guide fish in tidal waters during migration.
Fish pots, usually baited, are made from materials like bamboo and rattan to trap fish.
Fish shelters provide refuge for fish via anchored bundles of twigs, bushes, or weeds.

Hand Lines

Handlines consist of a line and hooks, including simple and multiple lines.
Jigger lines have multiple hooks operated by jerking motion under a light.
Pole and line techniques use a single handline attached to a loop.
Troll lines are long, baited handlines used in towing operations.

Longlines

Extremely long lines deployed with several hooks, can be set or drifting.
Set longlines are anchored and can be submerged or hung on the surface.
Drift longlines lack fixed attachments, allowing free movement in the water.

Nets

Impounding nets capture fish by confining them, including set-impounding and filter nets.
Drift nets and encircling drive-in nets can be driven by noise or other means.
Traps are passive, guiding fish into chambers with retarding devices to prevent escape.

Hook and Line Methods

Hooks attract fish using edible or artificial baits, snagging fish as they pass by.
Types of lines include handlines, pole and lines, jig lines, set long lines, and troll lines.

Grappling and Wounding Gear

Equipment such as harpoons, spears, clamps, and tongs is used to immobilize fish.
These methods can wound or kill fish for retention during capture.

Harvesting Machines

Modern machines mechanically transfer fish from water to vessels.
Techniques include pumps, hydraulic jets, and conveyor belts for efficient harvesting.

Other Capture Gear

Various instruments are used, including hand nets, snares, explosives, and electrical methods.
Snares serve as running nooses; spears and harpoons allow for direct capture.

Barriers and Traps

Hoop nets feature funnel-like designs with non-return valves.
Fyke nets utilize multiple entrance funnels for guiding fish.
Mobile impounding methods involve lift nets and pull or drag nets for active capture.

Seines

Seines are nets with a bag section bordered by wings, used in both shallow and reef areas.
Different seine varieties include drag seines, purse seines, and ring nets.
Blanket nets and bag nets are utilized for capturing fish using light sources or dragging methods.

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Description

This quiz explores the different types of fish traps and barricades used in aquatic environments. It covers methods like barricades, fish corrals, and fish pots, highlighting their purpose in preventing fish escape and aiding in migration. Test your knowledge on these fishing techniques and their construction.