[MARMAM] New paper: Southern right whales show no behavioral response to low noise levels from a nearby unmanned aerial vehicle
f.christiansen at live.se
Mon May 18 01:08:57 PDT 2020
My co-authors and I are happy to announce the publication of the following paper in Marine Mammal Science:
Christiansen F, Nielsen MLK, Charlton C, Bejder L, Madsen PT. Southern right whales show no behavioral response to low noise levels from a nearby unmanned aerial vehicle. Mar Mam Sci. 2020;1–11. https://doi.org/10.1111/mms.12699
ABSTRACT: Unmanned aerial vehicles (UAVs) are increasingly used for wildlife research and monitoring, but little information exists on their potential effect on marine mammals. We assessed the effects of a UAV on the behavior of southern right whales (Eubalaena australis) in Australia. Focal follows of ten right whale mother-calf pairs were conducted using a theodolite. Control data were recorded for 30 min, and then a DJI Inspire 1 Pro was flown above the whales for 10 min at 5 m altitude. Potential changes to horizontal behavior (swim speed and turning angle) and surfacing pattern (interbreath intervals) were investigated by comparing mother-calf behavior before and during UAV approaches. Changes in respiration rate were used to quantify energetic effects. We also explored acoustic cue perceptibility of the UAV at 5, 10, and 30 m altitude, by measuring the received UAV underwater noise level on whales equipped with acoustic tags (DTAGs). The received noise levels were 86.0 ± 3.9 dB re 1 μPa, while the measured ambient noise was 80.7 ± 7.3 dB re 1 μPa in the same frequency band (100–1,500 Hz). No behavioral response to the UAV was observed. This provides support for UAVs as a noninvasive tool to study baleen whale behavior and ecophysiology.
Here is a link to the full article:
Assistant Professor/Postdoctoral Research Fellow
Aarhus Institute of Advanced Studies
Aarhus University, Denmark
f.christiansen at aias.au.dk
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