Aggregations of wild fish were counted around 9 floating sea-cage fish farms along a 300 km stretch of the Spanish coastline in the south-western Mediterranean Sea, Each fish farm cultivated Sparus aurata and Dicentrarchus labrax in 6 to 16 floating…
fish aggregation
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We investigated the effects of a purse-seine fishery with drifting fish aggregating devices (FADs) in the South Sherbo area of the Equatorial Atlantic, located between 0-5degreesN and 10-20degreesW. There had been no surface fishing activity in the…
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The abundance and size structure of wild fish aggregated around a floating sea-cage fish farm were assessed and compared with control sites over a period of 1 yr. The farm was located 3.1 km offshore from El Campello (Alicante, SE Spain) and…
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This paper addresses the problem of acoustic shadowing (i.e. first-order scattering) using an heuristic approach. It is shown that the relationship between the shadow coeffcient the proportional reduction of the acoustic energy due to the shadowing…
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Stars are an alternative design for acoustically acoustically surveying isolated fish aggregations in which transects cross at a centre point over an aggregation to form a star or wheel-spoke pattern. The method was devised particularly for…
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Background: Ecological traps form when artificial structures are added to natural habitats and induce mismatches between habitat preferences and fitness consequences. Their existence in terrestrial systems has been documented, yet little evidence…
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To examine the attractiveness of coloured fish aggregation devices (FADS), six sets of four to six FADS of the kite type were deployed in coastal waters and dive observations were carried out for 15 months. The FADS had the same dimensions but…
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We investigated the patterns of occurrence of FAD-associated fish off the coast of Sardinia, Sicily and Majorca (Western Mediterranean). Two working hypotheses are presented to test whether or not "differences exist in fish assemblages at i) the…
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The behaviour and aggregation of fish in an artificial reef area in Tioman Island, Malaysia, was observed using underwater videography under a combination of shooting conditions. The camera distance and direction relative to the neighboring…
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The abundance and size structure of wild fishes aggregated around the sea-cages of two commercial Thunnus thynnus farms, including control locations, were assessed and compared over a 1 year period. The T. thynnus farms were located in the eastern…
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This paper compares the species composition of free swimming schools and schools associated with fish aggregating devices (or FADs) observed by scientists in the eastern equatorial Atlantic during the early eighties and late nineties. This…
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The influence of floating seaweed patches on the distribution and behaviour of seabirds was investigated using the European Seabirds At Sea database (ESAS). The percentage of observations that seabirds were observed with floating seaweed differed…
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Many coral reef fishes exhibit regular localised migrations between feeding and spawning areas, but the factors affecting these migration patterns, such as the distance, frequency and spawning site fidelity are poorly understood. The aim of this…
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Fishermen have used Fish Aggregating Devices (FADs) for more than half a century, and although much is now known about the behavior and biology of tunas and other pelagic fishes, the reason why FADs attract fish still remains largely unexplained.…
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Aggregations of fish around fish aggregation devices (FADs) have been widely described in the literature; most commercial catches of tuna by surface fisheries are performed around FADs, taking advantage of this behaviour. The meeting point…
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