Integrative bioacoustics discrimination of eight delphinid species in the western South Atlantic Ocean

Autor: Juliana C. Di Tullio, Artur Andriolo, Bruna Ribeiro Duque, Juliana R. Moron, Franciele R. de Castro, Thiago Orion Simões Amorim, Eduardo R. Secchi
Jazyk: angličtina
Rok vydání: 2019
Předmět:
0106 biological sciences
Sound Spectrography
Time Factors
Decision Analysis
Marine and Aquatic Sciences
Social Sciences
01 natural sciences
Vocalization
Psychology
Atlantic Ocean
Mammals
Multidisciplinary
geography.geographical_feature_category
Geography
Animal Behavior
Physics
Decision tree learning
Discriminant Analysis
Eukaryota
Killer Whales
Vertebrates
Physical Sciences
Engineering and Technology
Medicine
Management Engineering
Cartography
Algorithms
Research Article
Bioacoustics
Dolphins
Science
Marine Biology
Human echolocation
Biology
Research and Analysis Methods
010603 evolutionary biology
Species Specificity
Discriminant function analysis
Animals
Marine Mammals
Behavior
geography
Pilot Whales
Receiver operating characteristic
Continental shelf
010604 marine biology & hydrobiology
Decision Trees
Organisms
Whales
Biology and Life Sciences
Acoustics
Signal Bandwidth
Linear discriminant analysis
Animal Communication
ROC Curve
Multivariate Analysis
Amniotes
Signal Processing
Earth Sciences
Cosmopolitan distribution
Vocalization
Animal
Zoology
Zdroj: PLoS ONE, Vol 14, Iss 6, p e0217977 (2019)
PLoS ONE
ISSN: 1932-6203
Popis: This study presents an integrative bioacoustics approach to discriminate eight species of odontocetes found on the outer continental shelf and slope of the western South Atlantic Ocean. Spinner, Atlantic spotted, rough-toothed, Risso’s, bottlenose, short-beaked common dolphins, killer and long-finned pilot whales were visually confirmed during recordings with a 3-element omnidirectional hydrophone array. Spectral and time parameters of whistles and echolocation clicks were used in a discriminant function analysis and a classification tree model. As a first step, whistles and clicks were analysed separately; a further analysis consisted of both vocalisations jointly classified. All species showed species-specific properties in their vocalisations. Whistles had greater misclassification rates when compared to clicks. The correct classification was enhanced by the joint step, given the 5.8% error in the discriminant function analysis and a misclassification rate of 18.8% in the tree model. In addition, Receiver Operating Characteristic curves resulting from the tree algorithm analysis exhibited better model efficiency for all species in the joint classification. These findings on acoustical discrimination of such abundant and cosmopolitan species contribute to delphinid classification systems.
Databáze: OpenAIRE
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