Studies On Lipid Nutrition And The Expression Of Genes For Desaturase And Elongase Enzymes In Snakehead, Channa Striata (Bloch, 1973) Fingerlings
| dc.contributor.author | Paiko, Mohammed Aliyu | |
| dc.date.accessioned | 2018-08-16T07:14:27Z | |
| dc.date.available | 2018-08-16T07:14:27Z | |
| dc.date.issued | 2011-07 | |
| dc.description.abstract | This study examined lipid nutrition in C. striata fingerlings, through a series of experimental feeding trials, including; the evaluation of lipid/protein ratio and fatty acid (FA) requirements, as well as the screening of some of its tissues for the expression of genes for fatty acyl desaturase (FAD) and fatty acyl elongase (FAE) enzymes. These preliminary studies provided some insight about lipid metabolism in the species; suggesting that snakehead fingerling requires 65/450 g kgô€€€1 lipid/protein ratio, provided in a diet supplying a GE content of 18.5 kJ gô€€€1. The tissues screened revealed that FAD and FAE genes are all expressed more in the liver and brain than in the muscle, kidney, skin, intestine, testis and ovary. In further experimental trials, dietary FO in feeds for the species was incrementally substituted with crude palm oil (CPO) and palm fatty acid distillate (PFAD), both of which are relatively cheaper than FO and abundant in Malaysia and Indonesia. Results revealed that growth performance and feed efficiency improved (P<0.05) with increasing vegetable oils (VO) in the diet up till 50% of FO was substituted, above which additional dietary VO resulted in non-significant decline. The expression of genes in response to dietary VO revealed that FAE was up-regulated in the 50CPO and 50PFAD groups compared to the control, whereas FAD was only up-regulated in the 50CPO group accordingly. The whole body composition of lipids, FA and amino acids (AA) was compared between reared and wild C. striata juvenile, the result revealing no much difference in the contents of arachidonic acid (ArA), glycine, aspartic and glutamic acids, as well as all other essential AA respectively. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/6334 | |
| dc.language.iso | en | en_US |
| dc.publisher | Universiti Sains Malaysia | en_US |
| dc.subject | lipid nutrition in C. striata fingerlings | en_US |
| dc.subject | through a series of experimental feeding trials | en_US |
| dc.title | Studies On Lipid Nutrition And The Expression Of Genes For Desaturase And Elongase Enzymes In Snakehead, Channa Striata (Bloch, 1973) Fingerlings | en_US |
| dc.type | Thesis | en_US |