Aquaculture Science
Online ISSN : 2185-0194
Print ISSN : 0371-4217
ISSN-L : 0371-4217
Original Papers
Age and Growth of the Bagrid Catfish Pseudobagrus nudiceps in the Koya River, Western Honshu Island, Japan
Naohiko TakeshitaKunimasa AokiKazuhiro YamabayashiAkira Araki
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JOURNALS FREE ACCESS

2012 Volume 60 Issue 3 Pages 371-376

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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.

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© 2012 Japanese Society for Aquaculture Research
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