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Article

A System for Monitoring Acoustics to Supplement an Animal Welfare Plan for Bottlenose Dolphins

1
National Marine Mammal Foundation, San Diego, CA 92106, USA
2
Scottish Oceans Institute, St Andrews University, St Andrews KY168LB, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Lance Miller
J. Zool. Bot. Gard. 2021, 2(2), 222-233; https://doi.org/10.3390/jzbg2020015
Received: 18 March 2021 / Revised: 22 April 2021 / Accepted: 27 April 2021 / Published: 29 April 2021
(This article belongs to the Special Issue Cetaceans: Conservation, Health, and Welfare)
Animal sounds are commonly used by humans to infer information about their motivations and their health, yet, acoustic data is an underutilized welfare biomarker especially for aquatic animals. Here, we describe an acoustic monitoring system that is being implemented at the U.S. Navy Marine Mammal Program where dolphins live in groups in ocean enclosures in San Diego Bay. A four-element bottom mounted hydrophone array is used to continuously record, detect and localize acoustic detections from this focal group. Software provides users an automated comparison of the current acoustic behavior to group historical data which can be used to identify periods of normal, healthy thriving dolphins, and allows rare instances of deviations from typical behavior to stand out. Variations in a group or individual’s call rates can be correlated with independent veterinary examinations and behavioral observations in order to better assess dolphin health and welfare. Additionally, the monitoring system identifies time periods in which a sound source from San Diego Bay is of high-enough amplitude that the received level at our array is considered a potential concern for the focal animals. These time stamps can be used to identify and potentially mitigate exposures to acoustic sources that may otherwise not be obvious to human listeners. We hope this application inspires zoos and aquaria to innovate and create ways to incorporate acoustic information into their own animal welfare management programs. View Full-Text
Keywords: animal welfare; acoustic monitoring; vocal behavior; vocal biomarkers; marine mammal; bioacoustics; communication; distress call animal welfare; acoustic monitoring; vocal behavior; vocal biomarkers; marine mammal; bioacoustics; communication; distress call
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MDPI and ACS Style

Jones, B.L.; Oswald, M.; Tufano, S.; Baird, M.; Mulsow, J.; Ridgway, S.H. A System for Monitoring Acoustics to Supplement an Animal Welfare Plan for Bottlenose Dolphins. J. Zool. Bot. Gard. 2021, 2, 222-233. https://doi.org/10.3390/jzbg2020015

AMA Style

Jones BL, Oswald M, Tufano S, Baird M, Mulsow J, Ridgway SH. A System for Monitoring Acoustics to Supplement an Animal Welfare Plan for Bottlenose Dolphins. Journal of Zoological and Botanical Gardens. 2021; 2(2):222-233. https://doi.org/10.3390/jzbg2020015

Chicago/Turabian Style

Jones, Brittany L., Michael Oswald, Samantha Tufano, Mark Baird, Jason Mulsow, and Sam H. Ridgway. 2021. "A System for Monitoring Acoustics to Supplement an Animal Welfare Plan for Bottlenose Dolphins" Journal of Zoological and Botanical Gardens 2, no. 2: 222-233. https://doi.org/10.3390/jzbg2020015

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