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Pastas de Rhodomonas salina (Cryptophyta) como alimento para Brachionus plicatilis (Rotifera)

dc.creatorMiguel Guevara
dc.creatorBERTHA OLIVIA ARREDONDO VEGA
dc.date2011
dc.identifierhttp://cibnor.repositorioinstitucional.mx/jspui/handle/1001/1417
dc.identifier.urihttp://dspace.cibnor.mx:8080/handle/123456789/2767
dc.description"Rhodomonas salina (Cryptophyta) pastes as feed for Brachionus plicatilis (Rotifera). Rotifers are an important live feed for first feeding larvae of many fish species. The use of concentrated algae cells in the mass culture of the rotifer Brachionus plicatilis (Brachionidae) has opened new horizons for research on this organism. Pastes of Rhodomonas salina (Pyrenomonadaceae) obtained either by centrifugation or flocculation with chitosan were preserved, with or without vitamin C, at -20°C for four weeks and were evaluated biochemically (proteins, lipids, pigments and fatty acids contents) and subsequently, were used to feed the rotifer Brachionus plicatilis at a ratio of 25mg/L/day. Four different microalgae pastes were prepared: (1) centrifuged and preserved with vitamin C (CV), (2) centrifuged and preserved without vitamin C (C), (3) flocculated and with vitamin C (FV) and (4) flocculated without vitamin C (F). All treatments showed similar contents of proteins and total lipids with respect to control culture (a fresh culture of R. salina), with mean values of 40.0±2.32% and 12.0±1.45%, respectively. The pheophytin a/chlorophyll a ratio, a general indicator of the chemical status of microalgal concentrates, was similar (0.09-0.11) between centrifuged pastes and control culture, but was found to be higher in flocculated pastes (1.28-1.48). The fatty acid profile varied with respect to the control culture, mainly in the proportion of the essential polyunsaturated fatty acids (PUFAs): eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Total PUFAs, EPA and DHA contents were statistically similar between centrifuged pastes and control culture (PUFAs: 47%, EPA: 4% and DHA: 4.7%), whereas values obtained for flocculated pastes were significantly lower. The rotifers grew equally well when fed with centrifuged pastes or control culture (maximum density: 320rotifers/mL; instantaneous growth rate: 0.23rotifers/ day, fecundity: 1.49eggs/female and productivity: 43x103rotifers/L/day..."
dc.description"Pastas de Rhodomonas salina, obtenidas mediante centrifugación y floculación con quitosano y preservadas con o sin vitamina C, a -20°C fueron evaluadas bioquímicamente y proporcionadas como alimento al rotífero Brachionus plicatilis. Las pastas microalgales: (1) centrifugada y con vitamina C (CV), (2) centrifugada y sin vitamina C (C), (3) floculada y con vitamina C (FV) y (4) floculada y sin adición de vitamina C (F); mantuvieron sus contenidos de proteínas y lípidos totales similares al cultivo control, con valores de 40.0±2.32% y 12.0±1.45%, respectivamente. La relación feofitina a/clorofila a fue similar (0.09-0.11) entre las pastas centrifugadas y el cultivo control, pero mayor en las pastas floculadas (1.28-1.48). Las pastas centrifugadas presentaron porcentajes de PUFAs totales, EPA y DHA similares al cultivo control (PUFAs: 47%, EPA: 4% y DHA: 4.7%) y superiores al de las pastas floculadas. Las pastas obtenidas por centrifugación indujeron un crecimiento del rotífero igual al obtenido con el alimento control (densidad máxima: 320rotíferos/mL; tasa instantánea de crecimiento: 0.23rotíferos/día, fecundidad: 1.49huevos/ hembra y productividad: 43x103rotíferos/L/día). Se concluye que la pasta de R. salina centrifugada y congelada a -20°C, durante cuatro semanas, sin adición de vitamina C, mantiene su calidad nutricional similar a la del alga fresca y puede ser usada como alimento de Brachionus plicatilis."
dc.formatapplication/pdf
dc.languagespa
dc.publisherUniversidad de Costa Rica
dc.relationinfo:eu-repo/semantics/reference/ISSN/ISSN: 2215-2075
dc.relationinfo:eu-repo/semantics/reference/URL/URL: https://revistas.ucr.ac.cr/index.php/rbt/article/view/3415
dc.relationinfo:eu-repo/semantics/reference/DOI/DOI: 10.15517/rbt.v59i4.3415
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourceRevista de Biología Tropical
dc.subjectinfo:eu-repo/classification/AUTOR/microalgae paste, aquaculture, Rhodomonas salina, flocculation, rotifers
dc.subjectinfo:eu-repo/classification/AUTOR/pasta de microalgas, acuicultura, floculación, rotíferos
dc.subjectinfo:eu-repo/classification/cti/2
dc.subjectinfo:eu-repo/classification/cti/24
dc.subjectinfo:eu-repo/classification/cti/2401
dc.subjectinfo:eu-repo/classification/cti/310906
dc.subjectinfo:eu-repo/classification/cti/310906
dc.titlePastas de Rhodomonas salina (Cryptophyta) como alimento para Brachionus plicatilis (Rotifera)
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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