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Eighty nine ripe female brooders of the catfish, Clarias anguillaris (Body weight. range: 150 1,200 g) were induced to spawn by hormone (Ovaprim ® ) induced natural spawning technique over a period of 10 weeks. Matching ripe males were used for pairing the females at the ratio of two males to a female. Six ranges of brood stock body weight were considered as follows: Clarias anguillaris fry and maximum return on investment, female brooders of body weights ranging between 400 599 g are recommended for hormone induced natural breeding exercises. (International exchange rate: N129.00/US$1.00 as at 01 April, 2006) Keywords : Clarias anguillaris , brood stock size, induced breeding, fry production Journal of Aquatic Sciences Vol. 21(1) 2006: 19-22

journal of aquatic sciences

The effects of brood stock size on the economy of catfish (&lt;i&gt; Clarias anguillaris&lt;/i&gt;) fry production using the hormone induced natural breeding technique