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- W2347468049 abstract "The organization of the peripheral electrosensory system and populations of small pit organ, ampulla and sensory hair cell were studied by silver-stained whole mounts of skin and H. E. in a size-graded series of catfish (Parasilurus asotus).Small pit organ is one of electrosensory organs which occurs on surface area of skin of the catfish. Small pit organ of small individual has only one ampulla and that of large one may has 16 ampullae or more. New small pit organ also appear with growth of fish. The mean number of hair cells per ampulla is about 6 and remains constant in different size. As the increase of organ and ampulla, hair cells added greatly. The populations of organ, ampulla and hair cell increase postembryonically from about 1,400, 1,400 and 8,400 (L = 2.5cm) to more than 25,000, 200,000 and 1 200,000 (L=55cm) respectively.The large size of this hair cell population suggests a high biological importance of electrosensory system in the fish and the addition of the hair cell may be involved in sensibility improvement to electric current. It is notable since little or no addition of new neural elements occurs postembryonically in the central nervous system of mammals and espencially in the inner ear of human being. The phenomenon of receptor cell addition raises a multitude of questions about the factors controlling cell addition." @default.
- W2347468049 created "2016-06-24" @default.
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- W2347468049 date "1990-01-01" @default.
- W2347468049 modified "2023-09-25" @default.
- W2347468049 title "ON POSTEMBRYONIC CHANGES AND MORPHOMETRY IN THE PERIPHERAL ELECTROSENSORY SYSTEM OF A CATFISH" @default.
- W2347468049 hasPublicationYear "1990" @default.
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