Topic 12:fishing Methods Flashcards
What are the main fishing methods?
Demersal fishing
Shellfish traps
Pelagic fishing
What does sdemersal fishing include?
Fishing for species that live on the seabed
2 types of demersal fishing
Demersal trawling
Demersal lng lines
demersal trawling
Used for species on the seabed
E.g. cod,haddock,plaice,shrimps,scampi
Demersal long lines
Uses a line of baited hooks to catch species such as cod and haddock
Shellfish traps
Baited traps to catch crustaceans like crabs,crayfish and lobsters
What is pelagic fishing?
It includes fishing for species that live in open water above the seabed, often near water surface
4 types of pelagic fishing
Pelagic trawling
Drift nets
Purse seining
Pelagic long lines
Pelagic trawling
Used for species that form shoals in mid water or near the surface
E.g. bass, anchovies, herrings, mackerels
What is the advantage of pelagic trawling?
Pelagic fish are often in single species shoals
Little chance of catching non-target species except predator species e.g. dolphins
Drift nets
Long curtain like nets supported by floats and catch pelagic species near the surface line tuna and herring
Purse seining
Uses a net laid round a shoal
Top is held by floats
The bottom is held by weights, then pulled tight underneath the shoal
Used for tuna, sardines,herring and anchovies
Pelagic long lines
Lines of baited hooks which can be many Km in length
Catch species like tuna and squid
