Results 171 to 180 of about 1,275 (207)

Evolution of orbit size in toothed whales (Artiodactyla: Odontoceti)

Journal of Anatomy, 2021
AbstractFor many marine tetrapods, vision is important for finding food and navigating underwater, and eye size has increased to improve the capture of light in dim ocean depths. Odontocete whales, in contrast, rely instead on echolocation for navigation and prey capture.
Morgan Churchill, Colin Baltz
openaire   +2 more sources

Position of the larynx in odontoceti (toothed whales)

The Anatomical Record, 1987
AbstractThis study examines the positional relationships of the odontocete (toothed whale) larynx to further an understanding of their breathing, swallowing, and vocalizing abilities. Seventeen specimens representing nine cetacean genera (Delphinus, Stenella, Tursiops, Grampus, Delphinapterus, Globicephala, Kogia, Mesoplodon, and Phocoena) were studied
J S, Reidenberg, J T, Laitman
openaire   +2 more sources

Prenatal development of the integument in Delphinidae (Cetacea: Odontoceti)

Journal of Morphology, 1995
AbstractThe prenatal development of epidermis, dermis, and hypodermis was studied in embryos of different ago of two delphinid species (Stenella attenuata, Delphinus delphis), using light and transmission electron microscopical methods. The delphinid embryo is covered by a multilayered tissue formed by four different epidermal generations (periderm ...
W, Meyer, K, Neurand, M, Klima
openaire   +2 more sources

Parasitogenic Octavus Neuropathy as a Cause of Mass Stranding of Odontoceti

The Journal of Parasitology, 1986
this fraction. The MW suggested for F8-200 by the standards used in the Sephadex G-200 column ranged from 13 to 17K. In a preliminary study performed in 6.5% SDS-PAGE with the active F2-50 of hemolymph and intestinal homogenate of the unconcentrated samples, only a 14-17K band was detected (data not shown). When 10-fold concentrated F2-50 of intestinal
T, Morimitsu, T, Nagai, M, Ide, A, Ishii, M, Koono   +4 more
openaire   +2 more sources

Existence of vocal folds in the larynx of odontoceti (toothed whales)

The Anatomical Record, 1988
AbstractOdontocetes (toothed whales) vocalize for communication and echolocation. The mechanisms of sound production, however, remain unclear. Their larynx has long been thought to lack vocal folds and, thus, was considered incapable of generating sounds.
J S, Reidenberg, J T, Laitman
openaire   +2 more sources

SUBORDO ODONTOCETI

1982
exaly   +2 more sources

Head adaptation for sound production and feeding strategy in dolphins (Odontoceti: Delphinida)

Journal of Anatomy, 2020
Abstract Head morphology in toothed whales evolved under selective pressures on feeding strategy and sound production. The postnatal development of the skull ( n  = 207) and mandible ( n  = 219) of six Delphinida species which differ ...
Guilherme Frainer, Stefan Huggenberger, Ignacio B. Moreno, Stephanie Plön, Anders Galatius   +4 more
openaire   +2 more sources

Asymmetry of the nasofacial skull in toothed whales (Odontoceti)

Journal of Zoology, 2016
AbstractIn this study, the nasal asymmetry of odontocetes (toothed whales) was analyzed morphometrically by placing landmarks on photographed nasofacial skulls from 12 different species and genera that belong to four odontocete families. The results show that the degree of asymmetry tends to be linked with the mechanism of click sound generation in ...
S. Huggenberger, S. Leidenberger, H. H. A. Oelschläger   +2 more
openaire   +1 more source

Anatomy and physics of the exceptional sensitivity of dolphin hearing (Odontoceti: Cetacea)

Journal of Comparative Physiology A, 2010
During the past 50 years, the high acoustic sensitivity and the echolocation behavior of dolphins and other small odontocetes have been studied thoroughly. However, understanding has been scarce as to how the dolphin cochlea is stimulated by high frequency echoes, and likewise regarding the ear mechanics affecting dolphin audiograms. The characteristic
Simo, Hemilä, Sirpa, Nummela, Tom, Reuter   +2 more
openaire   +2 more sources

MASS STRANDING OF ODONTOCETI CAUSED BY PARASITOGENIC EIGHTH CRANIAL NEUROPATHY

Journal of Wildlife Diseases, 1987
Hearing organs of the Odontoceti from two mass strandings in 1983 and 1986 were examined histopathologically. In the 1983 stranding, two of three pilot whales (Globicephala macrorhynchus) were necropsied and numerous Nasitrema sp. were found close to the eighth cranial nerve (nervus vistibulo cochlearis) in both animals.
T, Morimitsu, T, Nagai, M, Ide, H, Kawano, A, Naichuu, M, Koono, A, Ishii   +6 more
openaire   +2 more sources