Does Boat Noise Affect Dugong (Dugong dugon) Vocalization?

Ando-Mizobata, Noriko; Ichikawa, Katsuhiko; Arai, Nobuaki; Kato, Hirotaka

doi:10.3106/041.039.0208

Cited by 7 publications

(3 citation statements)

References 19 publications

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“…This indicates that the effects of provisioning may be reversible, at least in some situations. However, the residual impact on a population over the longer term due to such interference is 'underexplored' (Ando-Mizobata et al, 2014).…”

Section: Habituation To Provisioningmentioning

confidence: 99%

“…In shallow waters, behavioural responses were accentuated(Nowacek et al, 2004). Other studies (e.g., bottlenose dolphin [Mediterranean] e LaManna et al, 2014: Ando-Mizobata et al, 2014Kessler et al, 2013;Kessler and Harcourt, 2012 e humpback whale) have also recorded interruptions caused by tourist boat noise which could be considered to have the potential to impact biological processes if they persisted.…”

mentioning

confidence: 97%

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Effects of non-consumptive wildlife-oriented tourism on marine species and prospects for their sustainable management

Burgin

Hardiman

2015

Journal of Environmental Management

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Section: Habituation To Provisioningmentioning

confidence: 99%

mentioning

confidence: 97%

Effects of non-consumptive wildlife-oriented tourism on marine species and prospects for their sustainable management

Burgin

Hardiman

2015

Journal of Environmental Management

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“…An alternative explanation for the results observed in this study is the effect of noise on call structure. For example, multiple acoustic parameters of vocalizations changed with the presence of boat noise in dugongs (Ando-Mizobata et al, 2014), killer whales (Orcinus orca; Foote et al, 2004) and bottlenose dolphins (Tursiops aduncus; Marley et al, 2017). The Fort Pierce habitat is a no-boat entry zone.…”

Section: Call Structure Analysismentioning

confidence: 99%

Behavior related vocalizations of the Florida manatee (Trichechus manatus latirostris)

Brady

Moore

Love³

2021

Marine Mammal Science

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Florida manatees (Trichechus manatus) produce five broadly defined call types (squeaks, squeals, high squeaks, chirps, squeak‐squeals) but their use in social and nonsocial settings is unclear. The goal of this study was to investigate whether call categories and structure of manatee vocalizations varied with behavior. Multiple hydrophones were used to record vocalizations in four different environments and broad behavioral states. Vocalizations recorded from resting, cavorting, stressed, or feeding wild animals were subjected to mixed linear effects models to test whether vocalizations produced varied with behavior and calf presence. Measures of duration, entropy, and frequency modulation were extracted from vocalizations to investigate if structural parameters differ among behaviors. Although all five call categories were recorded, results suggest manatees vocalize using primarily three call types and vary the structure of the call based on behavior. High squeaks were correlated with calf presence. High entropy squeals were proportionally higher during cavorting suggesting they may be related to a heightened state of arousal. Squeaks were the dominant call type produced and were longer in duration and higher in frequency modulation when animals were stressed. This research provides a foundation for comparative studies on vocal behavior for the Florida manatee as well as studies on related species.

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