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Information entropy of humpback whale song
The Journal of the Acoustical Society of America, 1999Many theories of nonhuman animal communication posit a first-order Markov model in which the next signal depends only on the current one. Such a model precludes a hierarchical structure to the communication signal. Information theory and signal processing provide quantitative techniques to estimate the underlying complexity of an arbitrary signal or ...
Ryuji, Suzuki +2 more
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Science, 1971
1) Humpback whales ( Megaptera novaeangliae ) produce a series of beautiful and varied sounds for a period of 7 to 30 minutes and then repeat the same series with considerable precision. We call such a performance "singing" and each repeated series of sounds a "song." 2) All prolonged sound ...
Roger S. Payne, Scott McVay
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1) Humpback whales ( Megaptera novaeangliae ) produce a series of beautiful and varied sounds for a period of 7 to 30 minutes and then repeat the same series with considerable precision. We call such a performance "singing" and each repeated series of sounds a "song." 2) All prolonged sound ...
Roger S. Payne, Scott McVay
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Acoustic properties of humpback whale songs
The Journal of the Acoustical Society of America, 2006A vertical array of five hydrophones was used to measure the acoustic field in the vertical plane of singing humpback whales. Once a singer was located, two swimmers with snorkel gear were deployed to determine the orientation of the whale and position the boat so that the array could be deployed in front of the whale at a minimum standoff distance of ...
Whitlow W L, Au +5 more
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Sound production by singing humpback whales
The Journal of the Acoustical Society of America, 2010Sounds from humpback whale songs were analyzed to evaluate possible mechanisms of sound production. Song sounds fell along a continuum with trains of discrete pulses at one end and continuous tonal signals at the other. This graded vocal repertoire is comparable to that seen in false killer whales [Murray et al. (1998). J. Acoust. Soc. Am.
Eduardo, Mercado +3 more
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Acoustic interaction of humpback whales and whale-watching boats
Marine Environmental Research, 2000The underwater acoustic noise of five representative whale-watching boats used in the waters of west Maui was measured in order to study the effects of boat noise on humpback whales. The first set of measurements were performed on 9 and 10 March, close to the peak of the whale season.
W W, Au, M, Green
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Humpback whale song or humpback whale sonar? A reply to Au et al
IEEE Journal of Oceanic Engineering, 2001Au et al.'s arguments against the hypothesis that humpback whale songs function as long-range sonar are based on questionable assumptions rather than on empirical data. Like other echolocating mammals (e.g., bats), singing humpback whales: 1) localize targets in the absence of visual information; 2) possess a highly innervated peripheral auditory ...
E. Mercado, L.N. Frazer
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Humpback Whale’s Flukes Segmentation Algorithms
2021Photo-identification consists of the analysis of photographs to identify cetacean individuals based on unique characteristics that each specimen of the same species exhibits. The use of this tool allows us to carry out studies about the size of its population and migratory routes by comparing catalogues. However, the number of images that make up these
Castro Cabanillas, Andrea +1 more
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Humpback whale song: who sings?
Behavioral Ecology and Sociobiology, 2013While on their winter breeding grounds, male humpback whales (Megaptera novaeangliae) produce long sequences of structured vocalizations called song, whose function within the mating system is still unresolved. Here we ask which males sing. Is it only those sexually mature, as typifies songbirds and some lekking ungulates in which vocalizations during ...
Louis M. Herman +6 more
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Cetacean morbillivirus in Humpback whales’ exhaled breath
Transboundary and Emerging Diseases, 2020The humpback whale (HW; Megaptera novaeangliae) population that seasonally resides along the Brazilian coast concentrates in the Abrolhos Bank (Bahia and Espírito Santo states) for breeding during austral winter and spring. Cetacean morbillivirus (CeMV, Paramyxoviridae family) is currently one of the most significant biological threats to cetaceans ...
Kátia R. Groch +6 more
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