Article (Scientific journals)
Approximate compositional values and tissue fatty acid profiles of Nile Tilapia (Oreachromis niloticus L.) fed azolla-diets in earthen ponds
Abou, Youssouf; Fiogbé, Emile Didier; Beckers, Yves et al.
2011In Food and Nutrition Sciences, 2, p. 964-973
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Keywords :
Azolla filiculoides; Fish meal replacement; Oreochromis Niloticus; Fatty acid; Natural food; Earthen pond
Abstract :
[en] The approximate general composition and the fatty acid profile of Nile tilapia fed Azolla-diets in ponds were studied for 90 days. Six isonitrogenous (29.2% CP) and isoenergetic (16.9 kJ·g−1) diets were formulated to contain 0% (A0), 10% (A10), 20% (A20), 30% (A30), 40% (A40) and 50% (A50) of Azolla meal (AM), as partial fish meal (FM) substitutes. Diet A0 without AM served as a control. Fish growth decreased as AM level exceeded 20% in diets (P < 0.05). Dry matter and crude protein showed no significant differences (P > 0.05). Crude lipid was significantly lower in fish fed A50 and significant differences were also found in crude ash (P < 0.05). Linolenic acid (LLA) decreased significantly when AM level in diets increased (P < 0.05). In contrast, arachidonic acid (ARA), eicosapentaenoic acid (EPA) and docosahex- aenoic acid (DHA) showed significantly higher values in fish fed high AM (P < 0.05). The n − 3/n − 6 ratio ranged from 0.35 to 0.49, with values being significantly higher in fish fed A20, A30 and A50. High level of the fern reduces growth without negatively affecting fatty acid in fish. Fish PUFA, especially the (n − 3) fatty acids, are affected posi- tively, even when fed 50% AM, which is good for the quality of the fish produced in regard to the benefits for the health of consumers.
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Abou, Youssouf
Fiogbé, Emile Didier
Beckers, Yves  ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Micha, Jean-Claude
Language :
English
Title :
Approximate compositional values and tissue fatty acid profiles of Nile Tilapia (Oreachromis niloticus L.) fed azolla-diets in earthen ponds
Publication date :
2011
Journal title :
Food and Nutrition Sciences
ISSN :
2157-944X
eISSN :
2157-9458
Publisher :
Scientific Research, Irvine, United States - California
Volume :
2
Pages :
964-973
Peer reviewed :
Peer reviewed
Available on ORBi :
since 20 April 2012

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