Name some more different methods to catch fish and how they are used and for what type of fish and ecological damage

Dredging: - rigded structures towed along bottom - Bar dislodges shellshelfish as it drags over sediment - bivalves, oisters, clams - High ecological damage depending on sediment type Purse Seine: - vertical net sourrounds school of fish the bottom is closed - used for dense single species schools like makerel or tuna - low bicatch and no contact with seabed Gillnets - A net that hangs in the water - Size of fish depend on mesh size - High bycatch - little contact with sea bed - low impact