A Spider’s World: Senses and Behavior by Friedrich G. Barth PDF

By Friedrich G. Barth

ISBN-10: 3642075576

ISBN-13: 9783642075575

ISBN-10: 366204899X

ISBN-13: 9783662048993

Spiders are great creatures. Their various and intricate diversity of habit and hugely built sensory structures are excellently tailored to the environmental stipulations - as is confirmed by means of their evolutionary luck. Over four hundred million years, spiders have built their sensory organs to a desirable technical perfection and complexity.
In his fascinating publication, Professor Friedrich G. Barth places this technical perfection into the context of "biology", within which the interplay among surroundings and sensory organs and the selectivity of the senses as a hyperlink among surroundings and behaviour play a tremendous function. Professor Friedrich G. Barth used to be born in Munich, Germany, in 1940. He studied biology and human body structure in Munich and l. a.. In 1967, he got his doctorate below H. Autrum, 1970 he got his Habilitation in zoology. In 1974, he was once provided a chair on the collage of Frankfurt/M. on the grounds that 1987, he has been professor on the college of Vienna, Austria. His major parts of analysis are neurobiology, sensory structures, and biomechanics. he's a member of numerous clinical academies and editor-in-chief of the magazine of Comparative body structure A.

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Additional info for A Spider’s World: Senses and Behavior

Sample text

Such a stimulus imposes a force of only 1 to 5 x 10-8 N, and the diameter of the dendrites of the sensory cell receiving the stimulus changes by only about 10 to 20 nm. At the threshold, the corresponding value was 10- 19 Ws. This is equivalent to less than the energy contained in one photon of green light. 05 nm. Tateo Shimozawa and his coworkers at the Hokkaido University in Sapporo have recently declared the filiform hairs of the cricket Gryllus bimaculatus to be the most sensitive of all receptors so far described (Shimozawa et al.

In the exoskeleton of Cupiennius salei there are around 3300 slits (Barth and Libera 1970) (Fig. 1). The great majority (86%) are situated on the legs and pedipalps, embedded in hard, sclerotized exocuticle. The opisthosoma (without the petiolus) is equipped with 96 slits, which here are surrounded by soft mesocuticle. As in other arachnids, the slit sense organs of the spiders can be assigned to three types on the basis of the slit arrangement (Fig. 2): (i) isolated single slits, (ii) "loose" groups of several slits, and (iii) composite or lyriform organs, made up of as many as 30 slits close together in parallel (Plate 16).

Both of these aspects apply especially to the invertebrates, including our spiders; for example, spiders have a highly developed "wind sense" and finely tuned skeletal strain sensors. Such abilities are particularly appealing to zoologists because of their alien qualities: the detection of polarization patterns in sky light by bees and ants, the hearing of ultrasound in grasshoppers and bats, the infrared sense of some snakes, the magnetic-field sensitivity of bees, pigeons and migratory birds, and not least the electric sense of certain fishes.

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A Spider’s World: Senses and Behavior by Friedrich G. Barth


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