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Dietary Intake and Accumulation of Phlorotannins in Abalone after Feeding the Phaeophyte Ecklonia stolonifera
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  • Journal title : Journal of Life Science
  • Volume 25, Issue 7,  2015, pp.780-785
  • Publisher : Korean Society of Life Science
  • DOI : 10.5352/JLS.2015.25.7.780
 Title & Authors
Dietary Intake and Accumulation of Phlorotannins in Abalone after Feeding the Phaeophyte Ecklonia stolonifera
Bangoura, Issa; Hong, Yong-Ki;
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 Abstract
Dietary intake and bioavailability of phorotannins in abalone was investigated after feeding with the phlorotannin-rich brown seaweed Ecklonia stolonifera after 4 days starvation. Reverse-phase high-performance liquid chromatography (RP-HPLC) affords isolation and quantification of the major phlorotannins of 7-phloroeckol and eckol, which were identified by mass spectrometry and nuclear magnetic resonance. Abalone growth and feed consumption rates were similar when fed either with the E. stolonifera or the common feed seaweed Saccharina japonica for 20 days. Throughout the feeding period, 7-phloroeckolol was accumulated in the abalone flesh tissue up to an average of 0.58±0.13 mg/g dry weight after 6 days. Eckol was reached to 0.25±0.05 mg/g dry tissue after 6 days, and maintained the level until end of feeding period. By feeding S. japonica as a control, no phlorotannins were detected in the abalone tissues. Both of the abalone, fed with E. stolonifera or S. japonica, had enzymes that decomposed 7-phloroeckol and eckol in muscle tissues, with similar degradation rates of −0.05 or less and −0.05 mg/ml/hr, respectively. Phlorotannins were reduced by constitutive enzymes in abalone tissues. Therefore, value-added abalone containing bioactive phlorotannins can be produced by simply changing the feed to the phlorotannin-rich brown seaweed E. stolonifera 6 days before harvest.
 Keywords
Abalone;accumulation;Ecklonia stolonifera;phlorotannin;
 Language
English
 Cited by
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