Dear Colleagues,
On behalf of my co-authors, I'm pleased to announce the publication of
a new paper:
"Dolphins Adjust Species-Specific Frequency Parameters to Compensate
for Increasing Background Noise"
Elena Papale, Marco Gamba, Monica Perez-Gil, Vidal Martel Martin,
Cristina Giacoma
PLoS ONE 10(4): e0121711. doi:10.1371/journal.pone.0121711
A PDF version of the paper is available online at:
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0121711
or via email request to: [email protected]
ABSTRACT
An increase in ocean noise levels could interfere with acoustic
communication of marine mammals. In this study we explored the effects
of anthropogenic and natural noise on the acoustic properties of a
dolphin communication signal, the whistle. A towed array with four
elements was used to record environmental background noise and
whistles of short-beaked common-, Atlantic spotted- and
striped-dolphins in the Canaries archipelago. Four frequency
parameters were measured from each whistle, while Sound Pressure
Levels (SPL) of the background noise were measured at the central
frequencies of seven one-third octave bands, from 5 to 20 kHz. Results
show that dolphins increase the whistlesÂ’ frequency parameters with
lower variability in the presence of anthropogenic noise, and increase
the end frequency of their whistles when confronted with increasing
natural noise. This study provides the first evidence that the synergy
among SPLs has a role in shaping the whistles' structure of these
three species, with respect to both natural and anthropogenic noise.
Best,
Elena
--
--
Elena Papale, PhD
Institute for Coastal Marine Environment
National Research Council
Via del Mare 3
91021 Torretta Granitola (TP)
Italy
[email protected]
[email protected]
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