Dear Colleagues,
The Sea Search Africa <http://seasearch.co.za/> team is pleased to
annonce the publication of the following article in the Journal of the
Acoustical Society of America:
*Erbs, F., Elwen, S. H., & Gridley, T. (2017). *Automatic classification
of whistles from coastal dolphins of the southern African subregion.
/The Journal of the Acoustical Society of America/, /141/(4), 2489-2500.
*Abstract: *
Passive acoustic monitoring (PAM) is commonly used to generate
information on the distribution, abundance, and behavior of cetacean
species. In African waters, the utilization of PAM lags behind most
other continents. This study examines whether the whistles of three
coastal delphinid species (/Delphinus delphis/, /Tursiops truncatus/,
and /Tursiops aduncus/) commonly encountered in the southern African
subregion can be readily distinguished using both statistical analysis
of standard whistle parameters and the automated detection and
classification software PAMGuard. A first account of whistles recorded
from /D. delphis/ from South Africa is included. Using PAMGuard,
classification to species was high with an overall mean correct
classification rate of 87.3%. Although lower, high rates of correct
classification were also found (78.4%) when the two /T. aduncus/
populations were included separately. Classification outcomes reflected
patterns observed in standard whistle parameters. Such acoustic
discrimination may be useful for confirmation of morphologically similar
species in the field. Classification success was influenced by training
and testing the classifier with data from different populations,
highlighting the importance of locally collected acoustic data to inform
classifiers. The small number of sampling populations may have inflated
the classification success, therefore, classification trials using a
greater number of species are recommended.
The publication is available at http://dx.doi.org/10.1121/1.4978000, or
by emailing me at florence.e...@gmail.com.
Kind regards,
Florence Erbs
--
Florence Erbs
Research Assistant
Laboratori d'Aplicacions Bioacústiques (LAB)
Rambla Exposició, 24
08800 Vilanova i la Geltrú
Barcelona, Espanya
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