| Registro completo |
| Provedor de dados: |
OMA
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| País: |
Belgium
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| Título: |
Effect of vitamin C incorporation in live food on the larviculture success of aquaculture species
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| Autores: |
Merchie, G.
Lavens, P.
Nelis, H.
De Leenheer, A.P.
Sorgeloos, P.
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| Data: |
1993
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| Ano: |
1993
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| Resumo: |
A study was undertaken to upgrade the levels of vitamin C in <i>Artemia</i> and <i>Brachionus</i> through bioencapsulation and to investigate in this way the requirements for ascorbic acid (AA) during larviculture of fish and prawn. Ascorbyl palmitate (AP) was used as the vit C source because of its stable and lipophylic characteristics which allowed its incorporation in booster emulsions and its readily conversion into AA by <i>Brachionus</i> and <i>Artemia</i> . Under standard conditions very high levels of AA could be incorporated into the <i>Artemia</i> nauplii: supplementation of the enrichment emulsion with 20% AP (w/w) increased the AA-content up to 2000 ppm after 24h enrichment. Also in <i>Brachionus</i> the AA-level changed in function of the concentration of AP applied. 20% AP in the diet enhanced the AA-content in the rotifers 10-fold over 3 days of culture. Using three different enrichment levels in the live food (0%, 10% and 20%), no differences on growth nor survival could be observed for <i>Macrobrachium rosenbergii</i> under standard culture conditions. However, a significantly positive effect on the psychological condition of the postlarvae could be demonstrated when the vit C- boosted live food was administrated. For <i>Clarias gariepinus</i> larvae fed vit C- boosted <i>Artemia</i> , supplemental dietary ascorbate resulted in a significantly positive effect on growth: the 20% AP group weighed 30% more than the control (0% AP) on the final day of the experiment. Evaluation of the physiological condition showed a significantly higher resistance of the larvae according to the dietary vit C level.<i>Dicentrarchus labrax</i> larvae were successively fed rotifers (day 4-12) and enriched <i>Artemia</i> nauplii (day 13-46), supplemented with the same three vitamin C enrichment levels. No significant differences in production characteristics nor in stress resistance of the fish larvae could be observed, however, for all salinity stress tests the 20% AP group performed better.Comparing the results for the two aquaculture fish species, with those reported earlier for the larvae of the prawn <i>Macrobrachium</i>, it appears that requirements for vit C are species specific, and might even differ according to the culture conditions.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2743
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| Fonte: |
%3Ci%3EMededel.+Fac.+landb.+wet.+Rijksuniv.+Gent+58%284b%29%3C%2Fi%3E%3A+1999-2008
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| Direitos: |
info:eu-repo/semantics/restrictedAccess
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