t takes too many crab/lobsters out of their habitat making it harder for them to reproduce
wrecks ecosystems
fish don't reproduce
most trawling methods are sustainable and some other are not but most are
takes too many fish out of ecosystems
it is the most common way to fish
The temperatureof the water may vary making the fish move then the fishers will lose there spot
it takes out too many fish

Commercial Fishing

Sustainable and Unsustainable Fishing

Sustainable

Unsustainable

Main topic

Techniques

Trawling

the activity of fishing with a trawl net or seine.

Dredging

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

On-Shore Fishing

fishing that takes place in the shallow saltwater flats and bays

Off-Shore Fishing

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

Lobster and Crab Pots

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

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.

Gill Nets

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

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

Aquaculture

Fish Farms

a place where fish are artificially bred or cultivated

Disease

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

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.