TRAP-LINE: AN INNOVATIVE FISHING GEAR FOR MEDITERRANEAN SWORDFISH FISHERIES

TRAP-LINE: UNO STRUMENTO DI PESCA INNOVATIVO PER LA PESCA MEDITERRANEA AL PESCE SPADA

Abstract

During Summer 2024, observer deployed on pelagic longline vessel collected data about an innovative fishing gear known as the "trap-line" increasingly used in the Mediterranean swordfish pelagic longline fishery. Trap-lines consist of concentric monofilament rings combined with artificial bait and differ structurally and functionally from traditional hook-based baits. Despite representing about 30% of deployed fishing units, trap-lines accounted for more than half of the swordfish catch, resulting in a markedly higher catch per unit effort (CPUE) than conventional hooks. Trap-lines also showed improved selectivity, capturing fewer undersized individuals and slightly larger fish. Bycatch was minimal, with only five non-target specimens recorded, all released alive. These preliminary results suggest that trap-lines may provide a more efficient and selective alternative to traditional gears, potentially reducing bycatch and operational costs, although further research is needed to support their sustainable adoption in Mediterranean fisheries.