Chemoorientation in the feeding behavior of the blind Mexican cavefish Astyanax fasciatus (Characidae, Teleostei)

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• 作者：A. O. Kasumyan ; E. A. Marusov
• 关键词：orientation ; feeding behavior ; chemoreception ; olfaction ; anosmia ; cavefish ; Astyanax fasciatus
• 刊名：Russian Journal of Ecology
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：46
• 期：6
• 页码：559-563
• 全文大小：149 KB
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• 作者单位：A. O. Kasumyan (1)
  E. A. Marusov (1)
  
  1. Moscow State University, Moscow, 119991, Russia
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Ecology
  Environment
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3334

文摘

It was shown for the first time that the perception of the blind Mexican cavefish Astyanax fasciatus of the odour of food and targeted food search in response to it is completely controlled by olfaction. Blockage of olfactory reception deprives the fish of this ability. The odour concentration threshold (water extract of chironomid larvae) is 10- g/L. It is suggested that degeneration of visual organs does not intensify olfaction in troglobiont cavefish, but can cause its insignificant correction. Chronic anosmia (4 months) leads to weak recovery of chemoorientation, which supports the possession of external taste reception in blind cavefish. Keywords orientation feeding behavior chemoreception olfaction anosmia cavefish Astyanax fasciatus