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14 páginas, 9 figuras, 5 tablas, 1 apéndice.Fish farms cause wild fish to aggregate nearby and thus act to modify their distribution,\udbut the spatial and temporal extent of the attraction effect around farms is still poorly understood.\udWe examined attraction using an integrated approach combining 3 factors: spatial extent,\uddepth and season. We analysed an Atlantic bluefin tuna Thunnus thynnus (ABT) and a gilthead\udseabream Sparus aurata (SB) farm off the north-eastern coast of Spain which represent different\udfish farming models in the Mediterranean. Underwater visual counts were conducted from summer\ud2010 to spring 2011. We recorded 39 species at the SB farm and 17 species at the ABT farm.\udThe analysis of fish abundance and biomass at 3 stations located along a distance gradient from\udthe farm (SB: 0, 30, 200 m; ABT: 0, 100, 200 m) showed significantly higher values next to the cages\udthan at more distant stations, revealing that the spatial extent of the attraction effect was mainly\udrestricted to the cage rather than following a gradient. The intensity of the cage effect varied\udaccording to farm, season and depth, reflecting species-specific behaviours. At the SB farm, the\udcage effect persisted year round, varying with depth, whereas at the ABT farm, the effect was only\uddetected in summer and spring. These distinct spatial and temporal aggregation patterns suggest\udthat implementation of fishery regulatory measures to protect wild fish should be farm-specific.\udThis study emphasizes the importance of using an integrated approach to study wild fish aggregations\udat farms.K.B. was supported by a JAEPre_\ud2010_01276 scholarship from the Spanish National Research\udCouncil (CSIC).Peer reviewe

Spatial and temporal extension of wild fish aggregations at Sparus aurata and Thunnus thynnus farms in the north-western Mediterranean