Physiological responses of Sparus aurata and Dicentrarchus labrax exposed to an acoustic stimulus

Buscaino, Giuseppa and Filiciotto, Francesco and Di Stefano, Vincenzo and Buffa, Gaspare and Bellante, Antonio and Mazzola, Salvatore (2013) Physiological responses of Sparus aurata and Dicentrarchus labrax exposed to an acoustic stimulus. Technical Report. IAMC, Capo Granitola.

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Several field and laboratory studies evaluating the effects of sound on fish have shown that increased ambient sound levels could alter their habitat selection, behaviour, and ecology. Maritime traffic, even if it is characterized by low powers of emissions, is undoubtedly the most impactful environmental source because the most widespread, continuous and omni-directional. The impact of underwater noise on marine fishes is not enough understood and further information is needed to evaluate or predict any negative effects. The present study aims at investigating the motility and biochemical responses of 14 sub-adult European sea bass (Dicentrarchus labrax) and 14 sub adult gilthead sea bream (Sparus aurata) exposed to an experimental acoustic stimulus, mainly produced by vessel traffic and perceptible by majority of fishes, To evaluate the effect of the acoustic stimulus, the movement, blood glucose, blood lactate, haematocrit, albumin, cholesterol, total proteins, total bilirubin and tryglycerids values were assessed. Fishes were singularly placed into a sea cage in a natural harbour and exposed to a linear sweep of 1 second with an initial and final frequency respectively of 0.1 and 1 kHz repeated for 10 minutes without pause. The maximum sound pressure level of the single sweep was 150 (dBrms re 1µPa). After 10 minutes of stimulus projection, fish was captured for blood sampling procedure. All specimens were recorded for 10 minutes with two underwater video cameras for the evaluation og the fish mobility. On whole blood the immediate assessment of glucose and lactate with a portable blood glucose analyser and blood lactate analyser were performed. On serum samples were measered Albumin, Cholesterol, Total Proteins, Total Bilirubin and Tryglycerids contents. The noise exposure produced a significant increase in motility as well as an increase in lactate and haematocrit levels in sea bream and sea bass. A significant decrease of glucose was only observed in sea bream. No statistical differences were observed in Albumin, Cholesterol, Total Proteins, Total Bilirubin, Tryglycerids values between Control and Test groups both of sea bream and sea bass. The analysis of sea bream and sea bass motility and some haematic parameters indicates a disturb impact on the subjects exposed to acoustic stimulus.

Item Type: Monograph (Technical Report)
Subjects: 500 Scienze naturali e Matematica
600 Tecnologia - Scienze applicate
Depositing User: Dr. Francesco Filiciotto
Date Deposited: 19 May 2014 07:19
Last Modified: 19 May 2014 07:19

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