Document Detail


Growth Rate of the microalga Tetraselmis suecica changes the biochemical composition of Artemia species.
MedLine Citation:
PMID:  14961363     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The impact of different microalgal semicontinuous cultures on growth and biochemical composition in the next link of the food chain was tested using the filter feeder Artemia species as a model. The marine microalga Tetraselmis suecica was cultured semicontinuously with renewal rates between 10% and 50% and used to feed Artemia. Microalgal cultures maintained with a low renewal rate that had biochemical composition similar to that of the stationary-phase cultures commonly used in aquaculture produced poor growth and survival and low food-conversion efficiency compared to cultures maintained with a high renewal rate. Changes in the renewal rate in microalgal cultures also resulted in important changes in the gross biochemical composition of the filter feeder. The gross biochemical composition of the Artemia resembled that of the microalgae used as food except for total lipid content. The percentage of protein in the organic fraction of Artemia increased from 45% to 65% of the organic weight with increasing renewal rates in the microalgal cultures, while the carbohydrate percentage decreased under the same conditions. Higher renewal rates resulted in higher lipid percentages in the microalga, but in Artemia the percentage of lipids decreased from 19% of the organic weight with a renewal rate of 10%, to 13% with a renewal rate of 50%. The percentage of all polyunsaturated fatty acids in Artemia, including 20:5n-3, increased slightly with increasing renewal rates in the microalgal cultures. Results emphasize the importance of controlling microalgal nutritional value for the success of aquaculture food chains in which filter feeders are involved.
Authors:
J Fábregas; A Otero; A Domínguez; M Patiño
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Marine biotechnology (New York, N.Y.)     Volume:  3     ISSN:  1436-2228     ISO Abbreviation:  Mar. Biotechnol.     Publication Date:  2001 May 
Date Detail:
Created Date:  2004-02-12     Completed Date:  2004-02-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100892712     Medline TA:  Mar Biotechnol (NY)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  256-63     Citation Subset:  -    
Affiliation:
Laboratorio de Microbiología, Facultad de Farmacia, Universidad de Santiago, Santiago 15782, Spain. fabregas@usc.es
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