The quality of living preys for fish larval culture: preliminary results on mineral supplementation
Robin, J.H. (1989). The quality of living preys for fish larval culture: preliminary results on mineral supplementation, in: De Pauw, N. et al. (Ed.) Aquaculture: a biotechnology in progress: volume 1. pp. 769-774
In: De Pauw, N. et al. (1989). Aquaculture: a biotechnology in progress: volume 1. European Aquaculture Society: Bredene. ISBN 90-71625-03-6. 1-592 pp., meer
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Documenttype: Congresbijdrage
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| Abstract |
Seawater being rich in minerals, it is generally considered as a sufficient source of mineral nutrients for most marine organisms. In intensive aquaculture, living preys are often raised in confined seawater with high levels of biomass, therefore trace elements deficiencies may occur. In the first experiment, mass-cultured rotifers were enriched during 1 h with diets either with or without a mineral premix, before delivering them to turbot larvae ( Scophthalmus maximus L.) from day 2 to day 15. In a second experiment Artemia nauplii were fed during 2 days on mixed diets with or without the mineral premix. Each kind of Artemia was used to feed turbot larvae from day 20 to day 30. Incorporation of a mineral premix in the diet of the rotifer induced a significant growth improvement in turbot larvae and seemed to reduce mortality. The same premix used in Artemia food did not cause any difference in growth of turbots but had an effect on the fatty acid composition of Artemia and turbot. Mass-cultured Brachionus plicatilis are more likely to be deficient in minerals than are Artemia hatched from cysts harvested in the natural environment. These results show that minerals must be taken into account in intensive larval cultivation. |
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