疲惫的老马
发表于 2025-3-25 06:27:29
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Etching
发表于 2025-3-25 10:22:58
What is Ultrasound?, study of communication by animals has increased rapidly and some fascinating phenomena have been revealed through the development of methods for studying both the communication signals of the animals and also the capabilities of their sense organs. In addition the rapid development of techniques fo
红润
发表于 2025-3-25 13:51:26
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limber
发表于 2025-3-25 19:39:58
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倔强不能
发表于 2025-3-25 20:25:13
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两栖动物
发表于 2025-3-26 02:49:25
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Barter
发表于 2025-3-26 05:54:15
Other Insects, methods are also used. Dumortier (1963a) summarized the methods of sound production in insects as (1) friction of differentiated parts as in tettigoniids, crickets and grasshoppers, (2) vibration of membranes, for example the buckling of tymbal organs in cicadas and some moths, (3) the expulsion of
上下连贯
发表于 2025-3-26 11:53:11
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悲痛
发表于 2025-3-26 16:18:50
Other Vertebrate Groups,r ultrasonic, was discussed in Chapter 3. This ability is not confined to bats, however. Echo-location using audible cries has now been demonstrated in two genera of birds and in porpoises, while the dolphins use wide-band signals extending into the ultrasonic range. An echo-location function has al
集合
发表于 2025-3-26 19:49:06
Review and Speculations,unds are used for auto-communication or echo-location in cetacea and bats and possibly other small mammals, and they are apparently important in social behaviour in rodents and insects. They are also used in interspecific communication between bats and those moths that are able to detect the ultraso