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|Title:||Qualitative requirements of essential fatty acids for juvenile Penaeus monodon||Authors:||Merican, Z.O.
|Keywords:||Fats and fatty compounds
Feeding and nutrition - crustacean
Growth - crustacean
|Issue Date:||1-Dec-1996||Citation:||Merican, Z.O., Shim, K.F. (1996-12-01). Qualitative requirements of essential fatty acids for juvenile Penaeus monodon. Aquaculture 147 (3-4) : 275-291. ScholarBank@NUS Repository. https://doi.org/10.1016/S0044-8486(96)01379-8||Abstract:||The requirements of essential n - 3 and n - 6 fatty acids (EFA) for juvenile Penaeus monodon were assessed qualitatively in terms of weight and survival responses by feeding diets excluding each fatty acid separately. Purified diets contained 5% lipid mixture of 16:0 and 18:1n - 9 (conditioning/control diet), 5% cod liver oil (reference diet) or 4.2% lipid mixture of 16:0 and 18:1n - 9 and 0.8% mixture of four fatty acids of the five EFAs: 18:2n - 6, 18:3n - 3, 20:4n - 6, 20:5n - 3 and 22:6n - 3. In a separate experiment, shrimp were fed diets with 1% 20:5n - 3, 1% 22:6n - 3 or 1% mixture of 20:5n - 3 and 22:6n - 3 added to a 4% mixture of 16:0 and 18:1n - 9 as dietary lipid. In both experiments, feeding the reference diet with 5% cod liver oil resulted in higher growth than diets supplemented with pure polyunsaturated fatty acids (PUFAs). In experiment 1, weight gain of shrimp fed diets without supplements of 18:2n - 6, 20:4n - 6 and 20:5n - 3 ranged from 275 to 301%. A requirement for pre-formed 18:3n - 3 and 22:6n - 3 was indicated by the significant declines (P < 0.05) in weight gain (189 and 195%, respectively) when shrimp were fed diets without these fatty acids. When fed the diet supplemented with only 1% 22:6n - 3 as dietary EFA, weight gain of shrimp (359%) was significantly (P < 0.05) higher than of shrimp fed the diet supplemented with 1% 20:5n - 3. However, the addition of 22:6n - 3 to 20:5n - 3 significantly (P < 0.05) improved growth. Survival responses were not related to qualitative differences in n - 3 and n - 6 PUFAs supplemented into diets. Tissue levels of saturates and monounsaturates decreased with the supplementation of n - 3 and n - 6 PUFAs. No de novo synthesis of 18:3n - 3 was evident. The chain elongation and desaturation of 20:5n - 3 to 22:6n - 3 and the retroconversion of 22:6n - 3 to 20:5n - 3 occurred. These results showed differences in the qualitative requirements of EFA and bioconversion capabilities of P. monodon as compared with other penaeids.||Source Title:||Aquaculture||URI:||http://scholarbank.nus.edu.sg/handle/10635/106878||ISSN:||00448486||DOI:||10.1016/S0044-8486(96)01379-8|
|Appears in Collections:||Staff Publications|
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