[MARMAM] new publication on beaked whale acoustics

Laura Joan Feyrer laura.joan at gmail.com
Fri Aug 9 19:47:58 PDT 2019


For those interested in beaked whale acoustics, we are pleased to announce
our publication "Click characteristics of northern bottlenose whales
(Hyperoodon ampullatus) and Sowerby's beaked whales (Mesoplodon bidens) off
eastern Canada," has been published in The Journal of the Acoustical
Society of America (Vol.146, No.1). It can be found online at
https://doi.org/10.1121/1.5111336 DOI: 10.1121/1.5111336

ABSTRACT
Passive acoustic monitoring (PAM) is crucial to expanding the knowledge of
beaked whales, including the northern bottlenose whale (Hyperoodon
ampullatus) and Sowerby's beaked whale (Mesoplodon bidens). Existing
descriptions of clicks produced by these species are limited by sample
size, number of individuals recorded, and geographic scope. Data from
multiple encounters in the western North Atlantic are used to provide a
quantitative description of clicks produced by these species. Recordings
from nine encounters with northern bottlenose whales in Nova Scotia and
Newfoundland were analyzed (N = 2239 clicks). The click type described had
a median peak frequency of 25.9 kHz (10th–90th percentile range: 22.9–29.3
kHz), and a median inter-click interval (ICI) of 402 ms (N = 1917,
10th–90th percentile range: 290–524 ms). Recordings from 18 Sowerby's
beaked whale encounters from Nova Scotia were analyzed (N = 762 clicks).
The click type described had a median peak frequency of 65.8 kHz (10th–90th
percentile range: 61.5–76.5 kHz), and a median ICI of 237 ms (N = 677,
10th–90th percentile range: 130–315 ms). These results will contribute to
the development of methods to detect and classify beaked whale clicks to
the species level, improving the effectiveness of PAM and enhancing
scientific understanding and conservation efforts for cryptic and at-risk
cetaceans.


Cheers,

Laura Feyrer, PhD Candidate
Dalhousie University
Northern Bottlenose Whale Project
https://northernbottlenosewhale.weebly.com/
<https://northernbottlenosewhale.weebly.com/contact.html>
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