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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
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The effect of dietary n-3 HUFA and 22:6n-3/20:5n-3 ratio on white shrimp larvae and postlarvae
Wouters, R.; Van Hauwaert, A.; Naessens, E.; Ramos, X.; Pedrazzoli, A.; Lavens, P. (1997). The effect of dietary n-3 HUFA and 22:6n-3/20:5n-3 ratio on white shrimp larvae and postlarvae. Aquacult. Int. 5: 113-126
In: Aquaculture International. Springer: London. ISSN 0967-6120; e-ISSN 1573-143X, meer
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| Trefwoorden |
Marien/Kust; Brak water; Zoet water |
| Auteurs | | Top |
- Wouters, R.
- Van Hauwaert, A.
- Naessens, E.
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- Ramos, X.
- Pedrazzoli, A.
- Lavens, P., meer
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| Abstract |
The influence of varying dietary n-3 HUFA concentrations and ratios of 22:6n-3/20:5n-3 (DHA/EPA) on culture performance and fatty acid composition of white shrimp (Penaeus vannamei) larvae and postlarvae was verified in two experiments. In a first experiment, shrimp (zoea 2-postlarvae 11) were fed rotifers (Brachionus plicatilis) and Artemia spp. nauplii that were enriched with different self-emulsifying concentrates: one HUFA-free coconut oil (T1), and three iso-HUFA concentrates with DHA/EPA ratios of 0.6 (T2), 2 (T3) and 4 (T4), respectively. In a second experiment, postlarvae were fed for 25 days (starting from postlarvae 10) on isolipidic semi-purified diets: one HUFA-free control (TA), and four iso-HUFA diets with DHA/EPA ratios of 0.6 (TB), 0.9 (TC), 1.8 (TD) and 3.64 (TE), respectively. Experiment 1 revealed no significant differences in production characteristics, except that resistance to a counter-current stress in postlarvae 11 was significantly lower in T1 than in T2 and T3 (p<0.05). In experiment 2, postlarvae of TA had a significantly lower dry weight than the other treatments at the end of the trial. The effect of the DHA/EPA ratio within the experimental limits could not be demonstrated. Analysis of the fatty acid composition of the shrimp showed notable changes of n-3 HUFA concentrations during the metamorphosis from mysis to postlarvae, and a different response to the dietary concentrations of DHA compared to EPA. |
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