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Automatic detection of estuarine dolphin whistles in spectrogram images [article]

O. M. Serra, F. P. R. Martins, L. R. Padovese
2019 arXiv   pre-print
to the true corresponding shape of the whistles via an active contour algorithm; third, feature vectors are built from the geometry of each detected curve; and fourth, the detections are fed to a random  ...  An algorithm for detecting tonal vocalizations from estuarine dolphin (Sotalia guianensis) specimens without interference of a human operator is developed.  ...  enough to detect estuarine dolphin vocalizations in spectrograms of the landscape as intended.  ... 
arXiv:1909.04425v1 fatcat:jwfwzkrlaredtkez6ahoswc34q

Underwater recordings of the whistles of bottlenose dolphins in Fremantle Inner Harbour, Western Australia

Sarah A. Marley, Christine Erbe, Chandra P. Salgado Kent
2017 Scientific Data  
Dolphins use frequency-modulated whistles for a variety of social functions.  ...  This Data Descriptor presents an acoustic dataset of bottlenose dolphin (Tursiops aduncus) whistles recorded in the Fremantle Inner Harbour, Western Australia.  ...  Acknowledgements We would like to thank the Swan River Trust and the Department of Parks and Wildlife (DPaW) for continuing support of dolphin research in the Swan-Canning Rivers.  ... 
doi:10.1038/sdata.2017.126 pmid:28895948 pmcid:PMC5827105 fatcat:zu3z6gtfn5ae5p4ns5lrn67bqa

Identifying and predicting occurrence and abundance of a vocal animal species based on individually specific calls

H. Bailey, A. D. Fandel, K. Silva, E. Gryzb, E. McDonald, A. L. Hoover, M. B. Ogburn, A. N. Rice
2021 Ecosphere  
Identifying and predicting occurrence and abundance of a vocal animal species based on individually specific calls.  ...  The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Government, the  ...  Department of Interior's Bureau of Ocean Energy Management, Environmental Studies Program (contract numbers 14-14-1916BOEM, 14-17-2241BOEM, and 14-18-2420MEA).  ... 
doi:10.1002/ecs2.3685 fatcat:s43niq7adnfipgp6nx3n4pabom

Vocal universals and geographic variations in the acoustic repertoire of the common bottlenose dolphin

A. R. Luís, L. J. May-Collado, N. Rako-Gospić, T. Gridley, E. Papale, A. Azevedo, M. A. Silva, G. Buscaino, D. Herzing, M. E. dos Santos
2021 Scientific Reports  
For the common bottlenose dolphin (Tursiops truncatus), studies on acoustic variability are scarce, focus on a single signal type—whistles and on the influence of environmental variables.  ...  Overall, these dolphins present a rich acoustic repertoire, with 24 distinct signal sub-types including: whistles, burst-pulsed sounds, brays and bangs.  ...  We also acknowledge the contribute of Simon Elwen at the Mammal Research Institute, University of Pretoria, Pretoria, South Africa for the research effort in Namibia.  ... 
doi:10.1038/s41598-021-90710-9 pmid:34088923 pmcid:PMC8178411 fatcat:mo4duh4gvjhato5e63gsnhot2i

Using calls to estimate the abundance of inshore dolphins: a case study with Pacific humpback dolphins Sousa chinensis

Sofie M. Van Parijs, Joshua Smith, Peter J. Corkeron
2002 Journal of Applied Ecology  
. & Corkeron, P.J. (1994) Interspecific differences in whistles produced by inshore dolphins in Moreton Bay, Queensland, Australia. Canadian Journal of Zoology, 72, 1061-1068.  ...  They usually occur in schools of fewer than 10 animals, although occasion¬ ally schools of more than 20 individuals are observed, and are generally in shallow, brackish, estuarine and coastal marine waters  ... 
doi:10.1046/j.1365-2664.2002.00756.x fatcat:v6u4trh6wnanlnpndcypxr4dsm

Monitoring of a Nearshore Small Dolphin Species Using Passive Acoustic Platforms and Supervised Machine Learning Techniques

Francesco Caruso, Lijun Dong, Mingli Lin, Mingming Liu, Zining Gong, Wanxue Xu, Giuseppe Alonge, Songhai Li
2020 Frontiers in Marine Science  
Additionally, other dolphin vocalizations (including whistles, buzzes, and burst pulses) and different sound sources (soniferous fishes, snapping shrimps, human activities) were also reported.  ...  A new population of this species was recently discovered in waters southwest of Hainan Island, China.  ...  The number of clicks logged per file was also considered as an index of dolphin acoustic activity within the detection range of each platform.  ... 
doi:10.3389/fmars.2020.00267 fatcat:36hbpu4hsra6pgqk77irdyglpq

Sound‐pressure level distribution in a long, narrow hallway: Measurements versus results from a computer model with scattering from surface roughness and diffraction

Lily M. Wang, Jonathan Rathsam, Claus L. Christensen, Jens H. Rindel
2005 Journal of the Acoustical Society of America  
Over the course of 1 year ͑April 2004 -March 2005͒, dolphin whistles were recorded as part of an ongoing study of the effects of human activity on wild bottlenose dolphins.  ...  Preliminary analysis of the data suggests that both the rate of whistling and the types of whistles produced vary as a function of dolphin behavior.  ...  The deconvolution is based on a collection of known excitation signals of the maximum-length sequence ͑MLS͒ related classes, widely used in the spread spectrum communication, but less well known in acoustics  ... 
doi:10.1121/1.4785653 fatcat:vcvuciqds5cztjto3gadvh6rtm

Studying Marine Mammal Cognition in the Wild: A Review of Four Decades of Playback Experiments

Volker B. Deecke
2006 Aquatic Mammals  
This overview of playback experiments in the study of marine mammal cognition in the wild showed that such approaches contribute significantly to the field; however, in many cases, there appears to be  ...  An analysis of replication in marine mammal playbacks showed that the use of a small number of playback stimuli to conduct multiple playback trials (pseudoreplication) was common.  ...  Sperm whale (Physeter macrocephalus) behavioural response after the playback of artificial sounds. Reports of the International Whaling Commission, 47, 499-504.  ... 
doi:10.1578/am.32.4.2006.461 fatcat:jhog4ruoobaixl6hewjcmbkvk4