Commercial Fishing

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Aquaponics

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Lesson Plans for February 2012

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Commercial Fishing

Aquaculture

Environmental Concerns

These largely nitrogen-based wastes can cause oxygen depletion in coastal environments and a net loss of marine productivity in certain coastal areas.

Disease

is a disease of silver perch which can be responsible for mass mortality events in grow-out ponds.

Fish Farms

a place where fish are artificially bred or cultivated

Techniques

Tangle Nets

a type of nylon fishing net. Left in the water for no more than two days, and allowing bycatch to be released alive

Gill Nets

a fishing net which is hung vertically so that fish get trapped in it by their gills.

Drift Nets

a large net for herring and similar fish, kept upright by weights at the bottom and floats at the top and allowed to drift with the tide.

Lobster and Crab Pots

Crab traps are used to bait, lure, and catch crabs for commercial or recreational use.

Off-Shore Fishing

fishing in deep water (more than 30 metres) and at some distance from land.

On-Shore Fishing

fishing that takes place in the shallow saltwater flats and bays

Dredging

dredge which is towed along the bottom of the sea by a fishing boat

Trawling

the activity of fishing with a trawl net or seine.

Main topic

Sustainable and Unsustainable Fishing

Unsustainable

Sustainable