Whistles of beluga whales in the reproductive gathering off Solovetskii Island in the White Sea

Belikov, R. A.; Bel’kovich, V. M.

doi:10.1134/s1063771007040148

Cited by 28 publications

(39 citation statements)

References 19 publications

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“…The low number of inflection points found in this study may indicate that the whistles emitted by rough-toothed dolphins in the area are simple in their contour (Belikov and Bel'Kovich, 2007;May-Collado et al, 2007). Also, SF and EF, MinF and MaxF, and F1/4, F1/2, and F3/4 had similar values in most whistles (being EF, MaxF, and F3/4 slightly larger than start, min, and F1/4 and F1/2, respectively).…”

Section: Discussionsupporting

confidence: 54%

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Characteristics of whistles from rough-toothed dolphins (Steno bredanensis) in Rio de Janeiro coast, southeastern Brazil

Lima

Andrade

Carvalho

et al. 2012

The Journal of the Acoustical Society of America

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There is no information about the whistles of rough-toothed dolphins in the South Atlantic Ocean. This study characterizes the whistle structure of free-ranging rough-toothed dolphins recorded on the Rio de Janeiro coast, southeastern Brazil, and compares it to that of the same species in other regions. A total of 340 whistles were analyzed. Constant (N = 115; 33.8%) and ascending (N = 99; 29.1%) whistles were the most common contours. The whistles recorded had their fundamental frequencies between 2.24 and 13.94 kHz. Whistles without inflection points were frequently emitted (N = 255; 75%). Some signals presented breaks or steps in their contour (N = 97; 28.5%). Whistle duration was short (347 ± 236 ms and 89.7% of the whistles lasted <600 ms). Seventy-eight whistle contour types were found in the total of whistles analyzed, and 27 (7.9%) of these occurred only once. Most of the whistle types were unique to a particular recording session (N = 43). The signals emitted by the rough-toothed dolphins in southeastern Brazil were characterized by low frequency modulation, short duration, low number of inflection points, and breaks. Differences in the mean values of the whistle parameters were found between this and other studies that recorded Steno bredanensis, but as in other localities, whistles above 14 kHz are rare.

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Section: Discussionsupporting

confidence: 54%

“…These whistles were defined as single contours that were divided into several parts (Belikov and Bel'Kovich, 2007), usually referred to as breaks or steps in the contour. The parts of those whistles may even have different shapes.…”

Section: Methodsmentioning

confidence: 99%

Characteristics of whistles from rough-toothed dolphins (Steno bredanensis) in Rio de Janeiro coast, southeastern Brazil

Lima

Andrade

Carvalho

et al. 2012

The Journal of the Acoustical Society of America

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“…To ensure a low level of subjective error in measurements, only the highest quality data were included in analysis. The number of harmonics present for each call has been included in previous studies (e.g., Belikov and Bel'kovich, 2007); however, given the limitations of our recording system (8 kHz limit), this measurement was not included.…”

Section: Quantitative Classification and Statistical Analysis Of Callmentioning

confidence: 99%

“…2). The most common call type identified by Chmelnitsky and Ferguson (2012) in the Churchill River repertoire (10.3% of total calls) resembles our r-shaped whistle (rws), while the most common call type of White Sea (Russia) belugas were v-shaped whistles (Table I; Belikov and Bel'kovich, 2007).…”

Section: B Comparison Of Call Types With Other Known Repertoiresmentioning

confidence: 99%

“…CART analyses provided a robust classification method with an easy to interpret and visually appealing tree output displaying the splitting variable and criteria for each division in the tree. The exclusion of harmonics in classification (Belikov and Bel'kovich, 2007) was warranted due to the frequency limitation and did not appear to hamper classification by CART or Random Forest.…”

Section: A Difficulties In Classifying a Graded Call Systemmentioning

confidence: 99%

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Beluga whale (Delphinapterus leucas) vocalizations and call classification from the eastern Beaufort Sea population

Garland

Castellote

Berchok

2015

The Journal of the Acoustical Society of America

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Beluga whales, Delphinapterus leucas, have a graded call system; call types exist on a continuum making classification challenging. A description of vocalizations from the eastern Beaufort Sea beluga population during its spring migration are presented here, using both a non-parametric classification tree analysis (CART), and a Random Forest analysis. Twelve frequency and duration measurements were made on 1019 calls recorded over 14 days off Icy Cape, Alaska, resulting in 34 identifiable call types with 83% agreement in classification for both CART and Random Forest analyses. This high level of agreement in classification, with an initial subjective classification of calls into 36 categories, demonstrates that the methods applied here provide a quantitative analysis of a graded call dataset. Further, as calls cannot be attributed to individuals using single sensor passive acoustic monitoring efforts, these methods provide a comprehensive analysis of data where the influence of pseudo-replication of calls from individuals is unknown. This study is the first to describe the vocal repertoire of a beluga population using a robust and repeatable methodology. A baseline eastern Beaufort Sea beluga population repertoire is presented here, against which the call repertoire of other seasonally sympatric Alaskan beluga populations can be compared.

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Combining Cetacean Soundscape Ecology and Niche Modeling to Contribute in the Mapping of the Brazilian Continental Shelf

Rossi‐Santos

Oliveira

2016

Seafloor Mapping Along Continental Shelves

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Whistles of beluga whales in the reproductive gathering off Solovetskii Island in the White Sea

Cited by 28 publications

References 19 publications

Characteristics of whistles from rough-toothed dolphins (Steno bredanensis) in Rio de Janeiro coast, southeastern Brazil

Characteristics of whistles from rough-toothed dolphins (Steno bredanensis) in Rio de Janeiro coast, southeastern Brazil

Beluga whale (Delphinapterus leucas) vocalizations and call classification from the eastern Beaufort Sea population

Combining Cetacean Soundscape Ecology and Niche Modeling to Contribute in the Mapping of the Brazilian Continental Shelf

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