Age and Growth of the Bagrid Catfish <I>Pseudobagrus nudiceps</I> in the Koya River, Western Honshu Island, Japan

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  • Takeshita Naohiko
    Department of Applied Aquabiology, National Fisheries University
  • Aoki Kunimasa
    Department of Fisheries Distribution and Management, National Fisheries University
  • Yamabayashi Kazuhiro
    Department of Applied Aquabiology, National Fisheries University Present address: Honjo Central Wholesale Market, Daisui Co. Ltd.
  • Araki Akira
    Department of Applied Aquabiology, National Fisheries University

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Other Title
  • 木屋川におけるギギの年齢と成長
  • モクヤガワ ニ オケル ギギ ノ ネンレイ ト セイチョウ

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Abstract

Age and growth of the bagrid fish Pseudobagrus nudiceps in the Koya River, western Honshu Island, Japan were studied by examining ring marks of the vertebral centrum. A total of 212 males and 155 females were caught in the lower and middle reaches of this river between April 2009 and January 2010. The outer margins of the translucent band in the vertebral centrum formed annual rings in June. The spawning of this population was considered to take place mainly in July. The von Bertalanffy’s curves showed close agreement to age-standard length data of males and females as follows: Male, Lt=595.9 [1-exp {-0.064 (t+0.790)}] (t≦8); female, Lt=186.6 [1-exp {-0.273 (t+0.347)}] (t≦6). Where Lt is standard length in mm and t is age in years. These results indicate that males grow faster and live longer than females.

Journal

  • Aquaculture Science

    Aquaculture Science 60 (3), 371-376, 2012

    Japanese Society for Aquaculture Science

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