Differently colored ropes

Various colored rope or other vertical line material used as 1) buoy lines for crab, whelk or lobster pots, 2) end lines of connected pots or 3) end or anchor lines for gillnet systems (Kot et al. 2012).

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Study Type: 

Field study in the wild


Gulf of St. Lawrence, Canada

Target catch: 

Crab and whelk

Effect on bycatch species: 

Minke whales decreased swimming velocity and altered bearing when approaching a rope, particularly when ropes were black and white; some minke's altered underwater swimming trajectories when passing ropes and produced low-frequency vocalizations.

Effect on target catch: 

None reported


Bycatch species: 

Reduction technique: 

Fishing Gear: