A5048444744- Marine animal studies overview
- Underwater Acoustics Research
- Animal Vocal Communication and Behavior
- Underwater Vehicles and Communication Systems
- Marine and fisheries research
- Cephalopods and Marine Biology
- Identification and Quantification in Food
- Ichthyology and Marine Biology
- Ocean Acidification Effects and Responses
- Marine and coastal plant biology
University of Victoria
2024
Universidade Federal de Juiz de Fora
2014-2019
This study presents an integrative bioacoustics approach to discriminate eight species of odontocetes found on the outer continental shelf and slope western South Atlantic Ocean. Spinner, spotted, rough-toothed, Risso's, bottlenose, short-beaked common dolphins, killer long-finned pilot whales were visually confirmed during recordings with a 3-element omnidirectional hydrophone array. Spectral time parameters whistles echolocation clicks used in discriminant function analysis classification...
Acoustic parameters for the spinner dolphins' bioacoustic sounds have previously been described. However, dolphins in Southwest Atlantic Ocean were only recently studied near Fernando de Noronha Archipelago. Therefore, to contribute additional knowledge of this cosmopolitan species, study compares previous results with a Brazilian recording. Despite statistically significant differences, mean value comparison indicated that Hawaiian and spinners emit similar whistles. The fact geographical...
Abstract A previous comparison of whistles using data sampled at 48 kHz suggested that certain frequency parameters vary along a latitudinal gradient. This geographical pattern may be biased because higher frequencies could potentially have very different contents. The current study compared the acoustic Guiana dolphin ( Sotalia guianensis ) recorded sampling rate (96 kHz) and from groups occupying two never before sites, Benevente Bay, Espírito Santo, Brazil, Formosa Rio Grande do Norte,...
In order to evaluate strategies of cohesion in a fission-fusion society, the occurrence signature and copied whistles were investigated free-ranging spinner dolphins, Stenella longirostris. Through an one-element hydrophone array towed over Brazilian continental shelf break, group approximate 400 dolphins recorded at 96 kHz/24 bits while navigating. The preliminary results demonstrated 218 similar signals that fit into previous definitions or whistles. These produced bouts with inter-whistle...
Climate-change related increases in sea surface temperatures and associated declines ice the Arctic are driving phenological shifts habitat use of several species marine mammals, which also facing higher noise levels from increasing human activities. While some protected areas have been established, their effectiveness for interest, such as narwhal, not assessed. Sound is important communication navigation makes passive acoustic monitoring an appropriate tool studying these species, being...
The Clymene dolphin despite being endemic for the Atlantic Ocean continues to be least known species in genus Stenella without available information on their vocal repertoire Brazilian waters. Data were obtained during mitigation and monitoring work required by IBAMA under federal environmental licensing as conditions of license 108/16 3D seismic survey Pará/Maranhão Sedimentary Basin process 02022.000015/2014. record was performed onboard vessel Polarcus Alima with a Mseis (Night Hawk III)...
Spinner dolphins bioacoustics were study only in Fernando de Noronha Archipelago region the Western South Atlantic Ocean. Our aimed to describe acoustic parameters of this species recorded approximately 3500 km south Archipelago. An one-element hydrophone was towed 250 m behind vessel R/V Atlântico Sul over continental shelf break. Continuous mono recording performed with passing signals a digital Fostex® FR-2 LE, at 96 kHz/24 bits. A group approximate 400 on June 3, 2013, 168.9 shore...
Passive acoustic towed array during ship surveys has being applied to increase the knowledge about cetacean. From 2012 2015, arrays were used investigate cetacean distribution along western South Atlantic shelf break. Research cruises performed between 26°S and 38°S over continental break slope. Acoustic tracklines comprised an average of 780 nm effort per survey. Hydrophone (Auset®) 150 300 m behind vessel. The system was configured give a variable frequency response from 1592 (High Pass...
Some complex features found in tonal emissions may be the result of nonlinear phenomena sound production systems, which individually acoustic signals highly variable and complex. From analysis five opportunistic records distinct groups, two spinner (Stenella longirostris) three Atlantic spotted dolphins frontalis), we registered emission six different types nonlinearities. Spinner had less events presenting mostly biphonation form nonparallel bands subharmonics. presented a higher rate these...