The Israeli Journal of Aquaculture Bamidgeh 57(1), 2005, 62-66

 
EFFECTS OF ANDROSTENEDIONE, A PHYTOANDROGEN, 
ON GROWTH AND BODY COMPOSITION 
IN THE AFRICAN CATFISH CLARIAS GARIEPINUS 


Funda Turan* and Ihsan Akyurt
 

Department of Aquaculture, Faculty of Fisheries and Aquaculture, University of Mustafa 
Kemal, 31040 Antakya, Hatay, Turkey

(Received 15.6.04, Accepted 15.1.05)


Key words: African catfish, androstenedione, Clarias gariepinus, growth, phytoandrogen


Abstract


The present study investigated the effects of a phytoandrogen, androstenedione, on growth, 
body composition, and survival in African catfish, Clarias gariepinus. Three concentrations (25, 50, and 75 mg/kg feed) were administered for 120 days. Survival of treated groups did not significantly differ from the control and ranged 94.44-97.78%. A significantly higher weight gain was obtained in the 50 and 75 mg/kg diets. The fish fed these diets also had significantly better food conversion and protein efficiency ratios. Apparent net protein utilization was better in treated groups than in the control. The protein and lipid contents of the carcass of treated fish were significantly higher than in the control, with the highest contents in the 50 mg/kg treatment. The highest ash content was in the 25 mg/kg treatment. In overall parameters, 50 mg androstenedione per kg diet was the optimal concentration. 


* Corresponding author. Mailing address: Mustafa Kemal Universitesi, Su Urunleri Fakltesi, 31040 
   Antakya Hatay, Turkey; tel.: +90-326-245-58-16; fax: +90-326-245-58-17; e-mail: fturan@mku.edu.tr

home