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The use of lipid emulsions for sterol supplementation of spat of the Pacific oyster, Crassostrea gigas
Soudant, P.; Val Sanles, M.; Quere, C.; Le Coz, J.R.; Marty, Y.; Moal, J.; Samain, J.F.; Sorgeloos, P. (2000). The use of lipid emulsions for sterol supplementation of spat of the Pacific oyster, Crassostrea gigas. Aquaculture 184(3-4): 315-326. dx.doi.org/10.1016/s0044-8486(99)00323-3
In: Aquaculture. Elsevier: Amsterdam; London; New York; Oxford; Tokyo. ISSN 0044-8486; e-ISSN 1873-5622, more
Peer reviewed article  
Available in  Authors 
Keywords
    Algae
    Chemical compounds > Organic compounds > Lipids
    Chemical compounds > Organic compounds > Lipids > Steroids
    Cultures > Shellfish culture > Mollusc culture
    Developmental stages > Larvae > Invertebrate larvae > Molluscan larvae > Spat
    Food > Livestock food > Feed
    Metabolism
    Nutrition
    Magallana gigas (Thunberg, 1793) [WoRMS]; Mollusca [WoRMS]
Author keywords
    molluscs; oyster; Crassostrea gigas; spat; microalgae; artificial diet; nutrition; lipids; sterols; incorporation and metabolism
Authors  Top 
  • Soudant, P.
  • Val Sanles, M.
  • Quere, C.
  • Le Coz, J.R.
  • Marty, Y.
  • Moal, J.
  • Samain, J.F., correspondent
  • Sorgeloos, P., more
Abstract
    To determine the ingestion and absorption of lipid emulsions, spat were fed algae deficient in stigmasterol and cholesterol and an emulsion containing these two sterols. The ingestion-absorption of the emulsion was estimated by measuring incorporation of these two sterols in oyster lipids during the 33-day feeding period. They were supplemented with 0%, 3%, 10% and 20% emulsion wet weight of the algae dry weight. The results showed that after only 7 days of emulsion supplementation, significant differences were observed in the sterol composition. The quantities of stigmasterol and cholesterol absorbed by the spat were time- and dose-dependent. Nevertheless, compared to algal sterols, the absorption rate of the sterols from the emulsion was quite low and decreased with an increasing supply of emulsion. Other emulsion formulations need to be tested to improve the emulsion absorption rate in oyster spat. However, the sterols appeared to be good markers for assessment of lipophilic artificial diet digestion and absorption.
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