Effects of offshore wind farms operational noise on bluefin tuna behaviour
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AuthorsPérez-Arjona, I. (Isabel); Espinosa, V. (Víctor); Puig, V.; Ordóñez, P.; Soliveres, E. (Ester); Poveda, P.; Ramis, J.; de-la-Gándara, F. (Fernando); Cort, J.L. (José Luis)
The number of offshore wind farms is growing up quickly in the lasts years. Several studies about its environmental acoustic impacts have been developed at the same time the industry expands, most of them related to the high level impulsive noise produced during the pile diving process associated to the construction stage. Nevertheless, the study of the impact of the operational noise of turbines is very limited. In this paper we investigate the behavioural response of Bluefin tuna when exposed to the operation noise of a turbine. We analysed tuna reaction in terms of three parameters: depth of the school, swimming pattern and changes in the swimming direction. The experiment was developedin a fixed commercial tuna cage in the Mediterranean Sea. The usual behaviour of Bluefin tuna in captivity conditions was previously analysed using a continuous monitorization. Variations in depth were observed when feeding boat approaches, which could be interpreted as a consequence of the acoustical ...