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Title: Acoustic assessment of SIMRAD EK60 high frequency echo sounder signals (120 & 200 kHz) in the context of marine mammal monitoring
Authors: Risch, Denise
Wilson, Ben
Lepper, Paul A.
Issue Date: 2017
Publisher: Marine Scotland Science © Crown copyright
Citation: RISCH, D., WILSON, B. and LEPPER, P.A., 2017. Acoustic assessment of SIMRAD EK60 high frequency echo sounder signals (120 & 200 kHz) in the context of marine mammal monitoring. Scottish Marine and Freshwater Science, 8 (13), 24 pp.
Abstract: The use of active high frequency echo sounders for commercial activities and marine research has been increasing in recent years. Compared to other anthropogenic noise sources, high frequency echo sounders have received little attention in terms of their potential impacts on marine life. However, while these devices typically operate at centre frequencies outside the hearing range of most marine species, recent work has demonstrated that they may produce unintended energy at lower frequencies. These lower frequencies may extend into the audible range for several species of marine mammals and have the potential to affect their behaviour (Deng et al. 2014). Given the theoretical detectability of these lower frequencies by marine mammals, both signal types have the potential to elicit behavioural responses towards them. This should be considered in environmental impact assessments of activities using these devices and when planning marine mammal monitoring studies alongside ecosystem studies using active acoustic sonar systems.
Description: This is an Open Access report. It is published by Marine Scotland Science under the terms of Open Government Licence. To view this licence, visit: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. These terms are compatible with the Creative Commons Attribution License 4.0 and the Open Data Commons Attribution License.
Version: Published
DOI: 10.7489/1978-1
URI: https://dspace.lboro.ac.uk/2134/35950
Publisher Link: https://doi.org/10.7489/1978-1
ISSN: 2043-7722
Appears in Collections:Official Reports (Mechanical, Electrical and Manufacturing Engineering)

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