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Closed Access item Free amino acid leaching from a protein-walled microencapsulated diet for fish larvae

Authors:Yúfera, Manuel
Kolkovski, S.
Fernández-Díaz, C.
Dabrowski, K.
Keywords:Microparticulate diets, Free amino acids, Leaching
Issue Date:8-Jan-2002
Publisher:Elsevier
Citation:Aquaculture 214(1-4): 273-287 (2002)
Abstract:The leaching loss of free amino acids (FAA) from an experimental protein-walled microencapsulated diet (MC) for larval fish after immersion in water was measured and compared with leaching loss from a gelatin microbound diet (MB) containing the same dietary ingredients. The loss of FAA (as a percentage of total dietary FAA) was significantly higher in the MB diet compared to the MC diet. After 5 min of re-hydration, 22% of FAA were leached from the MB diet compared with 8% from the MC diet. After 60 min, 85% of FAA from the MB diet were leached into the water compared to 17% from the MC diet. The addition of free lysine to protein-walled microcapsules (MC-L) was also investigated to determine the suitability of MC for delivering specific FAA. Lysine was incorporated into the particles with an efficiency of 7.5% and accounted for approximately 60% of the total FAA in the diet. The loss of this amino acid from MC-L after 60 min of immersion was 1.4%. The loss of specific FAA from MB and MC diets was found to be negatively and positively correlated to the hydrophobic character (hydropathy index) of each FAA, respectively. These results support the use of protein-walled microcapsules as a vector for specific dietary amino acids using a macronutrient-balanced diet.
Description:15 páginas, 7 figuras, 2 tablas.
Publisher version (URL):http://dx.doi.org/10.1016/S0044-8486(01)00902-4
URI:http://hdl.handle.net/10261/42948
ISSN:0044-8486
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Appears in Collections:(ICMAN) Artículos

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