Download Auditory And Vestibular Organs of Marine Mammals (Russian by G. N. Sointseva PDF

By G. N. Sointseva

The fundamental instructions of the structural evolution of the outer, center and internal ears in representatives of a large ecological variety of mammals (terrestrial, subterranean, aerial, semi-aquatic and aquatic varieties, together with marine mammals) were traced during this monograph for the 1st time. The extensive spectrum of the species studied and the appliance of recent anatomical, optical and bio-mechanical equipment allowed the writer to explain formerly unknown structural positive aspects of the peripheral a part of the auditory process in animals with a diverse specialization of listening to. The impression of ecological and evolutionary elements at the structural association of the auditory organ used to be analyzed. The ecological and morphological procedure used to be worthy in revealing the truth that the peculiarities within the auditory organ constitution in numerous mammalian teams have been stipulated through the animals' version to yes acoustic positive factors of habitat. Morphological and practical diversifications of the peripheral a part of the auditory method directed to the optimization of auditory sensitivity in numerous habitats proved to be primary in evolution. specific realization used to be paid to the fewer broadly studied orders of mammals (pinnipeds, cetaceans), being of curiosity either from the perspective in their echolocation talents (in dolphins) and the effect of water habitat at the morphological edition improvement within the constitution of the peripheral a part of the auditory analyzer in semi-aquatic and aquatic species. The e-book is illustrated with a lot of unique micro-photos, photographs, drawings and is aimed toward morphologists, zoologists, ecologists and experts, operating within the box of bionics, in addition to scholars and tutors of organic and clinical departments in institutes and universities. Galina N. Solntseva is a Professor on the Laboratory for Bioacoustics within the A. N. Severtsov Institute of Ecology and Evolution Russian Academy of Sciences. She is a well known professional within the box of the evolutionary morphology of listening to. G.N. Solntseva has studied the peripheral a part of the auditory procedure in representatives of other ecological teams of mammals for a few years. She has taken half in different marine expeditions within the Black, Caspian, White Seas and within the Sea of Okhotsk with a view to gather morphological fabric and this has allowed her to collect a special (in phrases of quantity and species variety) choice of morphological fabric on marine mammals. G.N. Solntseva is the writer of greater than 100 medical works during this box, together with the monograph "The Auditory approach of Mammals", issued in 1979 through the publishing residence "Nauka".

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Auditory And Vestibular Organs of Marine Mammals (Russian Academic Monographs)

The elemental instructions of the structural evolution of the outer, heart and internal ears in representatives of a large ecological diversity of mammals (terrestrial, subterranean, aerial, semi-aquatic and aquatic varieties, together with marine mammals) were traced during this monograph for the 1st time. The vast spectrum of the species studied and the applying of contemporary anatomical, optical and bio-mechanical equipment allowed the writer to explain formerly unknown structural positive aspects of the peripheral a part of the auditory procedure in animals with a diversified specialization of listening to.

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Sample text

The handle and head of the malleus are well developed. The incus is large compared to the malleus, in that its body is markedly greater than the head of malleus. The muscular arm is absent. The stapes is large, with pronounced crura. The head of the stapes is smooth, as are the inner walls of the tympanum. Thus, the middle ear of flying lemurs reveals the features typical of most mammals. In this way, the long arm of the malleus in the Dermoptera order is already transforming into the long arm, which does not grow together with the wall of the tympanum.

A thin osseous plate is located in the joint area between the malleus and the incus. Among the representatives of the Macrochiroptera suborder, the structure of auditory ossicles does not reveal species diversity. In the genus Pteropus, a well-developed long arm of the malleus grows together with the wall of the tympanum. The muscular arm is absent. The incus is notable for its small size. The stapes has a concave base and two thin crura. The malleus of Rousettus has a spacious pars transversalis on its dorsal side and a well-developed muscular arm.

1948]. Thus far, I have compared the structures and features of the skin glands of the external auditory meatus in representatives of phylogenetically close and distant orders of mammals, including mammals of aerial, terrestrial, subterranean, semi-aquatic and aquatic habitats. This analysis makes it possible to determine the functional importance of both types of auricular glands and to follow a trend in the morphological changes which appear in the processes of mammalian adaptation to different habitats.

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