The Israeli Journal of Aquaculture Bamidgeh 56(1), 2004, 14-21.

EFFECT OF DIETARY OLIVE POMACE OIL AND L-CARNITINE ON GROWTH AND CHEMICAL COMPOSITION OF AFRICAN CATFISH, CLARIAS GARIEPINUS (BURCHELL, 1822)

Erdal Yilmaz, Mehmet Naz*, Ihsan Akyurt

Faculty of Fishery Sciences, Mustafa Kemal University, Hatay 31040, Turkey

(Received 5.5.03, Accepted 3.7.03)


Key words: African catfish, composition, growth, L-carnitine, olive pomace oil


Abstract

The effects of dietary olive pomace oil and L-carnitine on growth performance, body indices and chemical composition of African catfish, Clarias gariepinus, were investigated. A 3x2 factorial design was used by offering diets having three different energy/protein ratios and supplemental L-carnitine at either 0 or 2000 mg/kg diet. Ten juvenile African catfish (12 g/fish) were stocked into 80-l glass aquaria and fed an experimental diet for seven weeks. The L-carnitine supplementation did not affect body indices. However, growth and chemical composition were influenced by both dietary lipid and L-carnitine. The increase in muscle lipid was greater than in the liver for all treatments. Fish fed the high energy diet (9% olive pomace oil) had a low appetite and feed intake, while fish fed the low energy diet (3% olive pomace oil) and supplemental Lcarnitine had better feed intake and growth. On the other hand, fish fed the high energy diet (9% olive pomace oil) with or without L-carnitine had better feed conversion. * Corresponding author. Tel. +90-326-2455843, ext.1315, fax: +90-326-2455817, e-mail: mnaz@mku.edu.tr

* Corresponding author. Tel. +90-326-2455843, ext.1315, fax: +90-326-2455817,
e-mail: mnaz@mku.edu.tr

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