01743nas a2200181 4500008004100000245013600041210006900177520108800246653002401334653002501358653001901383653002601402100001501428700001401443700001701457700002001474856006701494 2019 eng d00aThe role of ambient sound levels, signal-to-noise ratio, and stimulus pulse rate on behavioural disturbance of seabass in a net pen0 arole of ambient sound levels signaltonoise ratio and stimulus pu3 a

Anthropogenic sources increasingly contribute to the underwater soundscape and this may negatively impact aquatic life, including fish. Anthropogenic sound may mask relevant sound, alter behaviour, physiology, and may lead to physical injury. Behavioural effect studies are often seen as critical to evaluate individual and population-level impact. However, behavioural responsiveness likely depends on context and characteristics of sound stimuli. We pose that ambient sound levels, signal-to-noise ratio (SNR), and pulse rate interval (PRI), could affect the behavioural response of fish. To study this, we experimentally exposed groups of tagged European seabass (Dicentrarchus labrax) to different impulsive sound treatments that varied in pulse level, elevated background level, SNR, and PRI. Upon sound exposure, the seabass increased their swimming depth. The variation in the increase in swimming depth could not be attributed to pulse level, background level, SNR or PRI. It may be that the current range of sound levels or PRIs was too narrow to find such effects.

10aanthropogenic noise10aDicentrarchus labrax10aFish behaviour10asignal-to-noise ratio1 aHubert, J.1 aNeo, Y.Y.1 aWinter, H.V.1 aSlabbekoorn, H. uhttps://linkinghub.elsevier.com/retrieve/pii/S037663571930329801258nas a2200181 4500008004100000245002800041210002800069260001600097520077500113653002400888653001700912653002000929653002100949100002000970700002300990700002001013856004301033 2018 eng d00aEcology of fish hearing0 aEcology of fish hearing cMay-11-20193 a

Underwater sound is directional and can convey important information about the surrounding environment or the animal emitting the sound. Therefore, sound is a major sensory channel for fishes and plays a key role in many life‐history strategies. The effect of anthropogenic noise on aquatic life, which may be causing homogenisation or fragmentation of biologically important signals underwater is of growing concern. In this review we discuss the role sound plays in the ecology of fishes, basic anatomical and physiological adaptations for sound reception and production, the effects of anthropogenic noise and how fishes may be coping to changes in their environment, to put the ecology of fish hearing into the context of the modern underwater soundscape.

10aanthropogenic noise10afish hearing10asound detection10asound production1 aPutland, R., L.1 aMontgomery, J., C.1 aRadford, C., A. uhttp://doi.wiley.com/10.1111/jfb.1386702430nas a2200265 4500008004100000022001400041245012500055210006900180260001600249520154900265653002401814653001101838653001401849653001901863653002501882653003101907100002601938700002401964700002901988700002802017700002702045700001802072700001902090856005502109 2018 eng d a0289-077100aEffects of hydroelectric turbine noise on the behaviour of Leporinus taeniatus (Characiformes: Anostomidae) in captivity0 aEffects of hydroelectric turbine noise on the behaviour of Lepor cOct-11-20193 a

Hydroelectric power plants (HPP) constitute one of the main forms of energy generation in the world, and its operation produces underwater noise through generators and turbines, which can potentially impact the aquatic fauna. Anthropogenic noise is a stressful factor and can affect behaviour, physiology and acoustic communication of many animal species. However, the noise impact produced by HPP on fishes has not been studied yet. In this research we investigated the noise impact of hydroelectric turbines on the behaviour of Leporinus taeniatus held captive in Brazil. We tested the hypothesis that noise could disturb fishes’ behaviour by affecting school organization, fish position in the tank and the speed of swimming. Two groups of 10 individuals were exposed to 30 sessions of noise played at an intensity of 100 dB re 1 µPa, during 40 s on days 0, 7 and 14. Behavioural data were obtained before, during, and after noise exposure. Results showed that the fish swam significantly faster, moving to the bottom and swimming in depolarised shoals during noise exposure in both groups. Temporal analysis showed that during noise exposure fish swam faster, were less stationary and used the bottom of the tanks more throughout sampling period. These data provide evidence that fish behaviour can be affected by the aversive stimulus of the noise of a hydroelectric turbine in operation. It also suggests that sound pollution issues should be taken into consideration when regulating the use of natural areas for HPP.

10aanthropogenic noise10aBrazil10aCharacins10aFish behaviour10aHydroelectric impact10aSão Francisco River basin1 aDuarte, Marina, H. L.1 aMelo, Rafael, M. C.1 aScarpelli, Marina, D. A.1 aCarvalho, Thiago, M. A.1 aPadovese, Linilson, R.1 aBazzoli, Nilo1 aRizzo, Elizete uhttp://link.springer.com/10.1007/s10164-018-0568-6