the European squid Loligo vulgaris is an important target species of commercial and recreational fisheries in the NW Mediterranean Handline jigging is one of the most common fishing gears used by both of these fisheries to catch squid which are trapped when they try to seize the lure with their tentacles An unknown but possibly significant number of squid are able to escape from this gear by losing one or both of their tentacles (drop off rate) Between April and july 2010 two sets of experiments under controlled laboratory conditions were carried out to test (n=15 squid) the indirect effect of tentacle loss on predation succeass and predation behaviour The first set of the experiments consisted of estimating the number of attacks and time spent until a squid with no (n=5) one (n=5) or two tentacles (n=5) successfully caught a prey item independent trials were carried out with two prey types with very different swimming capabilities (fish and shrimp) The second set of experiments consisted of prey-selectivity trials to determine whether squid prefer fish or shrimp when both are available The results obtainsd clearly demonstrate not only that squid missing tentacles have a reduced predation performance but also that they can change predation preferences and predation behaviour These changes might negatively affect the condition of injued squid (reduced fitness) Consequently The possibility of squid losing their tentacles deserves more attention in the management decisions for the squid fishery This indirect handline jigging effect may imply unreported fishing mortality (ghost fishing) that shoud be considered when making management decisions for this important fishery