Print Email Facebook Twitter How effectively do horizontal and vertical response strategies of longfinned pilot whales reduce sound exposure from naval sonar? Title How effectively do horizontal and vertical response strategies of longfinned pilot whales reduce sound exposure from naval sonar? Author Wensveen, P.J. von Benda-Beckmann, A.M. Ainslie, M.A. Lam, F.P.A. Kvadsheim, P.H. Tyack, P.L. Miller, P.J.O. Publication year 2015 Abstract The behaviour of a marine mammal near a noise source can modulate the sound exposure it receives.We demonstrate that two long-finned pilot whales both surfaced in synchrony with consecutive arrivals of multiple sonar pulses. We then assess the effect of surfacing and other behavioural response strategies on the received cumulative sound exposure levels and maximum sound pressure levels (SPLs) by modelling realistic spatiotemporal interactions of a pilot whale with an approaching source. Under the propagation conditions of our model, some response strategies observed in the wild were effective in reducing received levels (e.g. movement perpendicular to the source's line of approach), but others were not (e.g. switching from deep to shallow diving; synchronous surfacing after maximum SPLs). Our study exemplifies how simulations of source-whale interactions guided by detailed observational data can improve our understanding about motivations behind behaviour responses observed in the wild (e.g., reducing sound exposure, prey movement).© 2015 Elsevier Ltd. All rights reserved. Subject Observation, Weapon & Protection SystemsAS - Acoustics & SonarTS - Technical SciencesDefence ResearchBiologyDefence, Safety and SecurityCetaceansDisturbanceBehaviourEnvironmental impactNoiseRisk assessmentIndividual-based modelsSonar To reference this document use: http://resolver.tudelft.nl/uuid:088d2583-ff54-418e-8916-878adce52dcc DOI https://doi.org/10.1016/j.marenvres.2015.02.005 TNO identifier 530220 Source Marine Environmental Research, 106, 68-81 Bibliographical note Available online 24 February 2015 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.