Search results for " fish behaviour"

showing 2 items of 2 documents

Effects of recreational scuba diving on Mediterranean fishes: evidence of involuntary feeding?

2013

Despite a large body of literature assessing the impacts of recreational scuba diving on marine habitats, little attention has been paid to the potentially harmful effects this has on fishes. The aim of this study was the assessment of the immediate response of different fish species to divers’ activities. A decrease of fishes’ natural diffidence towards divers is shown, probably due to an enhanced availability of their prey as a result of divers’ contacts with the substrate.

Mediterranean climatelcsh:SH1-691Settore BIO/07 - EcologiaEnvironmental EngineeringEcologyMarine habitatsFish speciesfish behaviourshort-term effectScuba divingAquatic ScienceOceanographylcsh:Aquaculture. Fisheries. AnglingScuba diving fish behaviour short-term effect Mediterranean SeaPredationScuba divingFisheryGeographyScuba diving fish behaviour short-term effect Mediterranean Sea.Mediterranean Sea.Recreationhuman activitiesEcology Evolution Behavior and Systematics
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Effect of boat noise on the behaviour of bluefin tuna Thunnus thynnus in the Mediterranean Sea

2007

The effect of boat noise on the behaviour of bluefin tuna Thunnus thynnus was investi- gated in the Egadi Islands, Sicily, during spring 2005 using a fixed tuna trap set near shipping routes. Tuna behaviour was observed when exposed to both natural ambient sound and sound generated by hydrofoil passenger ferries, small boats and large car ferries. Acoustical and behavioural analyses were conducted with and without extraneous sound to define a list of behavioural categories. Each vessel produced different engine sounds with regard to their composition and bandwidth, and all were distinctly different from ambient sound levels. In the absence of boat noise, tuna assumed a con- centrated coordi…

Settore BIO/07 - EcologiaBluefin tuna; Boat noise; Fish behaviour; Swimming; Schooling; Anthropogenic; impact; Mediterranean SeaEcologyNoise pollutionAmbient noise levelAquatic ScienceAnthropogenicFisheryMediterranean seaOceanographyBluefin tunaSwimming behaviourimpactMediterranean SeaEnvironmental scienceBoat noiseTunaSchoolingEcology Evolution Behavior and SystematicsFish behaviourSwimming
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