Leisure boating noise as a trigger for the displacement of the bottlenose dolphins of the Cres–Lo?inj archipelago (northern Adriatic Sea,Croatia) |
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| Institution: | 1. Centro de investigación aplicada y transferencia tecnológica en recursos marinos “Almirante Storni”, (CIMAS), Centro Nacional Patagónico (CENPAT), Centro Nacional de Investigaciones Científicas y Técnicas (CONICET), Guemes 1030, (8520) San Antonio Oeste, Río Negro, Argentina;2. Centro para el Estudio de Sistemas Marinos (CESIMAR), Centro Nacional Patagónico (CENPAT), Centro Nacional de Investigaciones Científicas y Técnicas (CONICET), Blvd. Brown 2915, (9120) Puerto Madryn, Chubut, Argentina;3. Universidad Nacional de la Patagonia San Juan Bosco, Blvd. Brown 3051, (9120) Puerto Madryn, Chubut, Argentina;4. Escuela Superior de Ciencias Marinas (ESCIMAR), Universidad Nacional del Comahue, San Martín 247, (8520) San Antonio Oeste, Río Negro, Argentina;1. Univ. La Tuscia, Dep. of Ecological and Biological Sciences, Ichthyogenic Experimental Marine Centre (CISMAR), Borgo Le Saline, 01016 Tarquinia, VT, Italy;2. Accademia del Leviatano, V.le dell''Astronomia 19, 00144 Rome, Italy;3. MATTM, Via C. Colombo 44, 00147 Rome, Italy;4. Univ. Pisa, Dep. of Biology, Via Derna 1, 56126 Pisa, Italy;5. European Commission, Joint Research Centre, Institute for the Protection and Security of the Citizen, Via E. Fermi 2749, 21027 Ispra, VA, Italy;6. ISPRA, V. Brancati 48, 00144 Rome, Italy;7. Univ. Roma TRE, Dep. of Sciences, V.le G. Marconi 446, 00146 Rome, Italy;8. Centro Interuniversitario di Ricerca sui Cetacei (CIRCE), V.le Benedetto XV 5, 16132 Genova, Italy;1. School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia;2. Centre National de la Recherche Scientifique, UMR 8187 LOG, Laboratoire d''Océanologie et de Géosciences, Station Marine, 62930 Wimereux, France |
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| Abstract: | The waters of the Cres–Lo?inj archipelago are subject to intense boat traffic related to the high number of leisure boats frequenting this area during the summer tourist season. Boat noise dominates the acoustic environment of the local bottlenose dolphin (Tursiops truncatus) population. This study investigates the spatial and temporal change in the underwater noise levels due to intense boating, and its effect on the distribution of the bottlenose dolphins. In the period 2007–2009 sea ambient noise (SAN) was sampled across ten acoustic stations. During data collection the presence of leisure boats was recorded if they were within 2 km of the sampling station. Bottlenose dolphin spatial distribution was monitored in the same period. Results showed a strong positive correlation between high SAN levels and boat presence, particularly in the tourist season. Dolphin distribution indicated significant seasonal displacements from noisy areas characterized by the intense leisure boating. |
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