Rory Lines


Rory lines are designed to reduce seabird strikes with trawl cables. A simple and cost-effective strategy, similar in design to bird-scaring lines, vertical streamers are deployed off either side of the vessel, attached to a boom extending out over the water. This creates a physical barrier to seabirds who could otherwise fly into the trawl cables enter whilst feeding on offal discards. Designed to enhance the effectiveness of bird-scaring lines, this simple addition has been demonstrated to be effective.

Source: Rice 2012


Currently an area of active research, the Rory line has been trialled in the South African hake trawl fishery following its invention by a skipper in the demersal trawl fleet. These trials in 2011 and 2012 found that seabird cable collisions were reduced by up to 84%.

This page was last updated on 12.02.21.

Interested in how this and other measures could mitigate bycatch in your fishery? Get in touch with us to collaborate or take part in a study.

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