Results 171 to 180 of about 8,416 (193)

Morphology of the eyeball from the humpback whale (Megaptera novaeangliae)

Microscopy Research and Technique, 2014
ABSTRACTAquatic mammals underwent morphological and physiological adaptations due to the transition from terrestrial to aquatic environment. One of the morphological changes regards their vision since cetaceans' eyes are able to withstand mechanical, chemical, osmotic, and optical water conditions.
Fernanda M, Rodrigues, Fernanda M O, Silva, Ana Carolina, Trompieri-Silveira, Jociery E, Vergara-Parente, Maria Angélica, Miglino, Juliana P, Guimarães   +5 more
openaire   +2 more sources

Bronchopneumonia by Granulicatella balaenopterae in a humpback whale (Megaptera novaeangliae)

Veterinary Research Communications
We report a microbiological and pathological investigation of a juvenile male humpback whale (Megaptera novaeangliae) stranded in Mostardas, Rio Grande do Sul, Brazil. Macroscopically, the lung parenchyma exhibited a diffuse hyperemia, that on histological examination was composed of suppurative bronchopneumonia associated with necrosis of the ...
Anderson Hentz Gris, Derek Blaese de Amorim, Gabriela Merker Breyer, Fernanda Felicetti Perosa, Manoela Marchezan Piva, Emanoelly Machado Sousa da Silva, Larissa Caló Zitelli, Maria Eduarda Rocha Jacques da Silva, Mariana Costa Torres, Elisandro Oliveira dos Santos, Vanessa Lanes Ribeiro, Franciele Maboni Siqueira, Luciana Sonne   +12 more
openaire   +2 more sources

Characterizing and classifying humpback whale (Megaptera novaeangliae) song units.

The Journal of the Acoustical Society of America, 2011
Humpback whales, Megaptera novaeangliae, are one of the most recognizable and investigated marine mammals. However, little progress has been made in automatically distinguishing and classifying individual units of their song. A Matlab script has been developed to characterize the different song units and to apply the appropriate statistics to separate ...
Adrienne M. Copeland, Whitlow W. L. Au, Marc O. Lammers, Adam A. Pack, Julie N. Oswald   +4 more
openaire   +1 more source

Possible Sexing Technique for Humpback Whales (Megaptera novaeangliae)

Canadian Journal of Fisheries and Aquatic Sciences, 1980
By comparing photographs of humpback whales (Megaptera novaeangliae) photographed at the peak of their arch during a dive, we found some to be smooth and others to be scalloped middorsally caudal to the dorsal fin. Out of 410 photographs taken in southeast Alaska and Hawaii, 66% were found to be smooth and 34% scalloped.
V. P. Jurasz, D. McSweeney, C. M. Jurasz
openaire   +1 more source

Humpback whales, Megaptera novaeangliae (Cetaceaa : Balaenopteridae), in Hervey Bay, Queensland .

Wildlife Research, 1994
Humpback whales, Megaptera novaeangliae, of the Antarctic Area V stock, pass through Hervey Bay, Queensland, during their southward migration. As part of an investigation of the impact of commercial whalewatching in the bay, aerial surveys were conducted during the 1988-90 whalewatching seasons, and a photo-identification project was run over the 1988 ...
Corkeron, Peter J., Brown, Miranda, Slade, Robert W., Bryden, Michael M.   +3 more
openaire   +2 more sources

Air-Borne Sounds of the Humpback Whale, Megaptera novaeangliae

Journal of Mammalogy, 1967
Unusual wheezing blows were recorded from humpback whales. This sound was audible both underwater and in air, and appeared to be produced at the blowhole during exhalation. The wheezing blow was composed of frequencies up to 2 kcps and lasted about 2 sec. The in-air and underwater components of this sound are compared.
openaire   +1 more source

Sounds of two entrapped humpback whales (Megaptera novaeangliae) in Newfoundland

Marine Biology, 1979
A wide variety of sounds were recorded from two entrapped humpback whales (Megaptera novaeangliae), a female and a male, in Newfoundland, Canada, during the summers of 1975 and 1976. The sounds included pulsed moans, moans, yups, cries, chirps and clicks. Comparisons are made between the sounds of the two whales (male and female).
H. E. Winn, P. Beamish, P. J. Perkins
openaire   +1 more source

Prey densities and foraging of humpback whales,Megaptera novaeangliae

Experientia, 1987
Analysis of simultaneous sonor scans from a surface vessel and film from a remotely operated underwater camera show that euphausiids form extremely dense micropatches upon which humpback whales feed. Krill densities were found to be several orders of magnitude greater than values previously reported from results of towed net samplings and were ...
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Prenatal cranial ossification of the humpback whale (Megaptera novaeangliae).

Journal of morphology, 2015
Being descendants of small terrestrial ungulate mammals, whales underwent enormous transformations during their evolutionary history, that is, extensive changes in anatomy, physiology, and behavior were evolved during secondary adaptations to life in water.
Oliver, Hampe, Helena, Franke, Christy A, Hipsley, Nikolay, Kardjilov, Johannes, Müller   +4 more
openaire   +1 more source

Target strengths of humpback whales Megaptera novaeangliae

The Journal of the Acoustical Society of America, 1973
Measurements of the target strengths of humpback whales, Megaptera novaeangliae, have been made at short range. The use of a perfectly reflecting model has enabled the results obtained to be extrapolated to long ranges. The target strength at infinite range of adult humpbacks about 15 yd in length, insonified at 20 kHz, was found to be + dB, near the ...
openaire   +1 more source