Progress at production scale with various Artemia substitutes and supplements for marine fish larvae
De Wolf, T.; Dhert, P.; O'Brien, E.; Candreva, P. (2001). Progress at production scale with various Artemia substitutes and supplements for marine fish larvae, in: Hendry, C.I. et al. (Ed.) Larvi 2001: 3rd fish and shellfish larviculture symposium Gent, Belgium, September 3-6, 2001. Special Publication European Aquaculture Society, 30: pp. 157-161
In: Hendry, C.I. et al. (2001). Larvi 2001: 3rd fish and shellfish larviculture symposium Gent, Belgium, September 3-6, 2001. Special Publication European Aquaculture Society, 30. European Aquaculture Society: Oostende. XX1, 663 pp., meer
In: Special Publication European Aquaculture Society. European Aquaculture Society: Bredene. ISSN 0774-0689, meer
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| Beschikbaar in | Auteurs |
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Documenttype: Congresbijdrage
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| Trefwoorden |
Artemia Leach, 1819 [WoRMS]
Marien/Kust |
| Auteurs | | Top |
- De Wolf, T.
- Dhert, P., meer
- O'Brien, E.
- Candreva, P.
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| Abstract |
Over the last few years, Artemia sources have been available in variable quantities, forcing marine hatcheries to adjust their rearing methodology in function of this natural resource. Different approaches have been investigated such as improved weaning strategies, the use of high quality early weaning diets, and the optimization of the Artemia consumption. All these approaches were verified at production scale in European sea bream and sea bass hatcheries. Artemia consumption was reduced by appropriate weaning strategies based on revised feeding regimes. Using Inve's existing high-quality weaning diets, Artemia consumptions for the production of European sea bass and sea bream were decreased from 150kg to 90kg and from 120kg to 70kg cysts per million fry produced, respectively. New high-quality early weaning diets, developed through modem feed processing technology including live food substitution components, could further reduce the Artemia consumption by another 30-40% without impairing larval survival and quality .A more efficient use of Artemia was achieved by the introduction of a prolonged Artemia enrichment technique that allowed a 25- 30% nauplius biomass increase. Adapting the feeding regime in terms of this biomass increase provided a further decrease in Artemia cysts consumption. Besides the economical benefit, an improved quality was observed for the fry fed with prolonged enriched Artemia metanauplii. Above-mentioned strategies showed that the Artemia consumption for sea bass and sea bream could be reduced considerably, although the lower limit to which the Artemia consumption can be decreased has not been determined until now. The effect of a drastic Artemia reduction without compromising larval survival and quality in terms of deformity levels still needs to be investigated. |
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