The use of tuna industry waste in the practical diets of juvenile Nile tilapia (Oreochromis niloticus, L.): effect on growth performance, nutrient digestibility and oxidative status
Identifieur interne : 000787 ( Main/Exploration ); précédent : 000786; suivant : 000788The use of tuna industry waste in the practical diets of juvenile Nile tilapia (Oreochromis niloticus, L.): effect on growth performance, nutrient digestibility and oxidative status
Auteurs : Saber Abdelkader Saïdi [Tunisie] ; Mohamed Salah Azaza [Tunisie] ; Abdelwaheb Abdelmouleh [Tunisie] ; Jos Van Pelt [Belgique] ; Mohamed Mejdeddine Kraïem [Tunisie] ; Abdelfattah El-Feki [Tunisie]Source :
- Aquaculture Research [ 1355-557X ] ; 2010-11.
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Abstract
A 45‐day feeding trial was conducted to study the effect of replacing dietary fish meal (FM) with a tuna by‐product meal (TBM) on the growth, feed efficiency, carcass composition and stress oxidative status of juvenile Nile tilapia, Oreochromis niloticus L.). Triplicate groups of fish (2.21 ± 0.01 g) were fed on four iso‐nitrogenous and iso‐energetic diets. The control diet (A0) used FM as the sole source of animal protein. In the other three diets (A10–A30), 33%–100% of FM was substituted by TBM at 10% increments. There were no significant differences (P>0.05) in growth performance among fish fed on diets A0, A10 and A20. Fish fed these experimental diets (i.e., A0, A10 and A20) showed significantly (P<0.05) better daily mass gain, specific growth rate and protein efficiency ratio than those fed on diet A30. Feed conversion ratio increased with increasing TBM content, but only the value found in fish fed on diet A30 differed significantly (P<0.05) from the other treatments. The fish accumulated increasing quantities of lipids and decreasing levels of ash in their carcasses with increasing levels of dietary TBM. At the end of the experimental period, a significant increase (P<0.001) in catalase and glutathione S‐transferase activities was seen only in groups fed on diet A30. Similarly, a significant enhancement in glutathione peroxidase and superoxide dismutase activities was observed in groups fed on diets A20 and A30 compared with the other groups. The results show that this product can be included up to 20% in practical Nile tilapia diets without any detrimental effects.
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DOI: 10.1111/j.1365-2109.2010.02594.x
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ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A 45‐day feeding trial was conducted to study the effect of replacing dietary fish meal (FM) with a tuna by‐product meal (TBM) on the growth, feed efficiency, carcass composition and stress oxidative status of juvenile Nile tilapia, Oreochromis niloticus L.). Triplicate groups of fish (2.21 ± 0.01 g) were fed on four iso‐nitrogenous and iso‐energetic diets. The control diet (A0) used FM as the sole source of animal protein. In the other three diets (A10–A30), 33%–100% of FM was substituted by TBM at 10% increments. There were no significant differences (P>0.05) in growth performance among fish fed on diets A0, A10 and A20. Fish fed these experimental diets (i.e., A0, A10 and A20) showed significantly (P<0.05) better daily mass gain, specific growth rate and protein efficiency ratio than those fed on diet A30. Feed conversion ratio increased with increasing TBM content, but only the value found in fish fed on diet A30 differed significantly (P<0.05) from the other treatments. The fish accumulated increasing quantities of lipids and decreasing levels of ash in their carcasses with increasing levels of dietary TBM. At the end of the experimental period, a significant increase (P<0.001) in catalase and glutathione S‐transferase activities was seen only in groups fed on diet A30. Similarly, a significant enhancement in glutathione peroxidase and superoxide dismutase activities was observed in groups fed on diets A20 and A30 compared with the other groups. The results show that this product can be included up to 20% in practical Nile tilapia diets without any detrimental effects.</div></front></TEI><affiliations><list><country><li>Belgique</li><li>Tunisie</li></country></list><tree><country name="Tunisie"><noRegion><name sortKey="Saidi, Saber Abdelkader" sort="Saidi, Saber Abdelkader" uniqKey="Saidi S" first="Saber Abdelkader" last="Saïdi">Saber Abdelkader Saïdi</name></noRegion><name sortKey="Abdelmouleh, Abdelwaheb" sort="Abdelmouleh, Abdelwaheb" uniqKey="Abdelmouleh A" first="Abdelwaheb" last="Abdelmouleh">Abdelwaheb Abdelmouleh</name><name sortKey="Azaza, Mohamed Salah" sort="Azaza, Mohamed Salah" uniqKey="Azaza M" first="Mohamed Salah" last="Azaza">Mohamed Salah Azaza</name><name sortKey="El Eki, Abdelfattah" sort="El Eki, Abdelfattah" uniqKey="El Eki A" first="Abdelfattah" last="El-Feki">Abdelfattah El-Feki</name><name sortKey="Kraiem, Mohamed Mejdeddine" sort="Kraiem, Mohamed Mejdeddine" uniqKey="Kraiem M" first="Mohamed Mejdeddine" last="Kraïem">Mohamed Mejdeddine Kraïem</name></country><country name="Belgique"><noRegion><name sortKey="Pelt, Jos Van" sort="Pelt, Jos Van" uniqKey="Pelt J" first="Jos Van" last="Pelt">Jos Van Pelt</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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