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Titolo:
Growth rate of the microalga Tetraselmis suecica changes the biochemical composition of Artemia species
Autore:
Fabregas, J; Otero, A; Dominguez, A; Patino, M;
Indirizzi:
Univ Santiago, Fac Farm, Microbiol Lab, Santiago 15782, Spain Univ Santiago Santiago Spain 15782 Microbiol Lab, Santiago 15782, Spain
Titolo Testata:
MARINE BIOTECHNOLOGY
fascicolo: 3, volume: 3, anno: 2001,
pagine: 256 - 263
SICI:
1436-2228(200105/06)3:3<256:GROTMT>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIFFERENT NUTRIENT CONCENTRATIONS; DIETARY VALUE; BRINE SHRIMP; LARVAE; SURVIVAL; CULTURE; SALINA;
Keywords:
Artemia; Tetraselmis suecica; nutritional value; renewal rate; growth; survival; biochemical composition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Fabregas, J Univ Santiago, Fac Farm, Microbiol Lab, Santiago 15782, Spain Univ Santiago Santiago Spain 15782 ab, Santiago 15782, Spain
Citazione:
J. Fabregas et al., "Growth rate of the microalga Tetraselmis suecica changes the biochemical composition of Artemia species", MAR BIOTEC, 3(3), 2001, pp. 256-263

Abstract

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 culturesalso resulted in important changes in the gross biochemical composition ofthe filter feeder. The gross biochemical composition of the Artemia resembled that of the microalgae used as food except for total lipid content. Thepercentage 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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 11:20:17