Scottish fishermen are trialling a new technique to improve the quality consistency of mussels.

Highlands producer Inverlussa Shellfish is trialling the New Zealand 'continuous rope' system, which has successfully simplified the mussel harvesting process in the southern hemisphere.

The process uses loops of special rope that can be drawn aboard and through the harvesting machine semi-automatically, increasing consistency and minimising shell loss.

Most Scottish mussels are grown on single ropes or fabric suspended fromheavy horizontal ropes.