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

By G. N. Sointseva

ISBN-10: 1435630297

ISBN-13: 9781435630291

ISBN-10: 9546422800

ISBN-13: 9789546422804

The fundamental 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 kinds, together with marine mammals) were traced during this monograph for the 1st time. The large spectrum of the species studied and the appliance of recent anatomical, optical and bio-mechanical tools allowed the writer to explain formerly unknown structural positive aspects of the peripheral a part of the auditory approach in animals with a different specialization of listening to. The effect of ecological and evolutionary components at the structural association of the auditory organ used to be analyzed. The ecological and morphological technique was once helpful in revealing the truth that the peculiarities within the auditory organ constitution in several mammalian teams have been stipulated by way of the animals' version to certain acoustic gains of habitat. Morphological and sensible diversifications of the peripheral a part of the auditory approach directed to the optimization of auditory sensitivity in several habitats proved to be vital in evolution. specific realization used to be paid to the fewer largely studied orders of mammals (pinnipeds, cetaceans), being of curiosity either from the perspective in their echolocation talents (in dolphins) and the impression 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 booklet is illustrated with lots of unique micro-photos, images, drawings and is geared toward morphologists, zoologists, ecologists and experts, operating within the box of bionics, in addition to scholars and tutors of organic and scientific 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 widely known expert within the box of the evolutionary morphology of listening to. G.N. Solntseva has studied the peripheral a part of the auditory method in representatives of other ecological teams of mammals for a few years. She has taken half in several marine expeditions within the Black, Caspian, White Seas and within the Sea of Okhotsk which will acquire morphological fabric and this has allowed her to assemble a different (in phrases of quantity and species range) 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 process of Mammals", issued in 1979 through the publishing apartment "Nauka".

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

Example text

Instead, they encircle sparse hairs. Holocrine glands are small in size (on average up to 113 × 113 µm; Table 4) and have a complex alveolar structure. Each gland consists of four to five rounded lobes. Tubular glands are absent from the fur seal but are present in the Steller sea lion, in which they are simple tubular in structure, and are separated from one another. Each secretory tube is twisted into a ball; its long axis is perpendicular to the skin surface. The ball is usually small (up to 339 × 450 µm; Diagram 2; Tables 2, 4).

In other species, the long arm is large in size and connects rigidly with the wall of the tympanum. The m. tensor tympani is attached to the handle of the malleus, under whose contraction the tympanic membrane is pulled inside and, through a system of auditory ossicles, presses the stapes into an oval window. The malleus is fixed in a definite position with the help of three ligaments: a fore bundle that reaches the fissura Glasseri and gets attached to the pr. anterior of the malleus; a ligament located in the area opposite the neck of the malleus; and an axial ligament representing the axis, around which the malleus rotates.

Tubular glands are represented in the form of convoluted tubes, the secretory sections of which are twirled into a tangle. The diameter of the secretory section is about 56 µm (Table 4). The structure of the apocrine secretory epithelium is similar to that observed in the orders Insectivora and Chiroptera. The epidermis of the auditory meatus of these species includes multiple pigment granules. A more complicated structure of holocrine glands is found in the fox than in the mink and the sea otter (Diagram 2; Table 4).

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Auditory And Vestibular Organs of Marine Mammals (Russian Academic Monographs) by G. N. Sointseva

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