Assimilation of dietary phytosterols by Pacific oyster Crassostrea gigas spat

Knauer, J., Barrett, S.M., Volkman, J.K., and Southgate, P.C. (1999) Assimilation of dietary phytosterols by Pacific oyster Crassostrea gigas spat. Aquaculture Nutrition, 5 (4). pp. 257-266.

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Abstract

Pacific oyster Crassostrea gigas spat were fed either the microalga Chaetoceros muelleri, Isochrysis aff. galbana (strain T-IS0) or Pavlova lutheri to investigate the effect of dietary phytosterols on the sterol composition of spat tissues. After a 6-week feeding period the sterol profile of spat tissues generally reflected that of the diet, but not all sterols were assimilated with the same efficiency. 4-Desmethyl sterols, such as cholesterol and 24-methylcholesterol, were readily incorporated into spat tissues but 4-methyl sterols, such as 4-methyl-24-ethyl-5α-cholest-22E-en-3β-ol and the unusual 3,4-dihydroxy 4-methyl sterol 24-methylpavlovol present in P. lutheri, were poorly assimilated by spat. The absolute content of every sterol decreased in spat that had been starved for 6 weeks, but the relative sterol composition was similar to the initial sterol profile. However, the relative level of cholesterol increased, indicating the important role of this sterol in spat metabolism.

Item ID: 29102
Item Type: Article (Refereed Research - C1)
Keywords: alkenones, cholesterol, Crassostrea gigas, 4-methyl sterols. pavlovols, sterols
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ISSN: 1365-2095
Date Deposited: 02 Sep 2013 23:10
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070405 Fish Physiology and Genetics @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830104 Aquaculture Oysters @ 100%
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