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WDC project to prevent whale entanglement in ropes proves successful

Successful trials of sinking lines used for creel fishery

Our breakthrough collaborative project with creel fishers has successfully trialed a simple and relatively low-cost solution to the problem of whale entanglement that could be rolled out internationally saving many whales and other marine creatures.

The project led by WDC and funded by the Scottish Government Nature Restoration Fund managed by NatureScot and Jingle Jam, trialed the use of specially designed rope in Scottish pot fisheries that sinks rather than floats.

The rope currently used in the fishery is buoyant and forms floating loops in the water rather than lying on the seabed. These loops can be several metres high and have been found to entangle whales and other marine animals such as basking sharks. Previous studies had found the majority of whales and basking sharks entangled in static fishing gear (pots, or creels as they are known in Scottish fisheries) are caught in this floating groundline rope linking a line of creels together.

It is estimated that an average of 6 humpback whales, 30 minke whales, and 29 basking sharks become entangled annually in Scottish waters. Where entanglement type was known, 83% of minke and 50% of humpback whales, and 76% of basking sharks were caught in groundlines between creels. If there are no large floating rope loops, then whales and sharks cannot become entangled in them.

Trials were needed to determine whether it was practical for fishers to use this sinking rope. The fishers involved reported positive experiences with using the rope, and there were no impacts on the seabed.

Susannah Calderan, who managed the project for WDC, said; ‘The Scottish inshore creel fishery plays an important economic and community role in rural coastal areas in Scotland. Resolving the issue of entangling whales would be a major step forward in fisheries management as well as animal conservation and welfare.

‘We now have to move to the next step, which is consulting with other fishers around Scotland and with the Government to understand the possible options for implementing sinking rope more widely.’

'Sinking groundline represents a simple, relatively low-cost option to greatly reduce entanglement risk. The partnership approach with Scottish creel fishers and the Scottish Creel Fishermen’s Federation (SCFF) demonstrated the importance of collaboration to address complex conservation and management issues.'

Bally Philp from SCFF, who participated in this trial said ‘This trial has shown there can be win-win outcomes for both fishermen and marine life, and we’re all working together to achieve this’.

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