Characteristics of the Tonic Squirting in the Solitary Ascidian, Styela clava.

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  • ARAI Nagahira
    Education and Research Center of Marine Bio-resources, Faculty of Agriculture, Tohoku University
  • KARITA Keishiro
    Department of Physiology, Tohoku University School of Dentistry
  • HOSHIAI Gen-ichi
    Freshwater Fisheries Research Station of Miyagi Prefecture
  • KATAYAMA Satoshi
    Department of Applied Bio-sciences, Faculty of Agriculture, Tohoku University
  • HOSHINO Zen-ichiro
    Department of Biology, Faculty of Education, Iwate University

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Other Title
  • 単体性ホヤ・エボヤ，Ｓｔｙｅｌａ　ｃｌａｖａにみられる持続性噴出運動の特性
  • タンタイセイ ホヤ エボヤ Styela clava ニ ミラレル ジゾクセイ フンシュツ ウンドウ ノ トクセイ

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Description

Physiological characteristics of the solitary ascidian, Styela clava, were examined. Tonic squirtings were found by monitoring intrabranchial pressure changes and volume of continuously ejected sea water. Tonic squirting had lower intrabranchial pressure, longer duration, and longer interval than phasic one. Tonic squirting was not evoked by any somatosensory stimulation. These results suggest that tonic squirting has a different role and is controlled by a different nervous system from the phasic squirting.

Journal

  • Aquaculture Science

    Aquaculture Science 47 (1), 65-69, 1999

    Japanese Society for Aquaculture Science

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