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    Publication Date: 2021-05-19
    Description: Se reporta la caracterización de la microalga marina Chroomonas, aislada de una laguna salina ubicada al Norte de Maracaibo, Estado Zulia, Venezuela. El crecimiento y producción de pigmentos en cultivos discontinuos, se evaluó en función de la salinidad (5, 10, 35, 50, 70 y 100 ppm), intensidad luminosa (39, 78, 117 y 156 µmol quanta.m-2.s-1) y pH (5.0, 5.5, 6.0, 7.0, 8.0 y 9.0). La mayor densidad celular de 117.99±2.62x106 cel.ml-1, se alcanzó a 35 ppm, 156 µmol quanta.m-2.s-1 de intensidad luminosa y a un pH entre 6.0 y 8.0. El contenido celular de clorofila total y carotenoides se incrementa con la salinidad hasta 100 ppm, con 246.55±61.8 y 69.79±18.19 fg.cel-1 respectivamente. Chroomonas sp. demostró alta capacidad de producción de biomasa y de pigmentos cuando se cultivó a un volumen de 2.0 l en régimen semicontinuo y a una tasa de renovación diaria del 30 %. La productividad celular fue de 4.31x109 cel.l-1d-1; mientras que la de clorofila total y carotenoides de 1.4 mg.l-1.d-1 y 0.48 mg.l-1.d-1, respectivamente. Estos resultados indican que esta microalga planctónica podría ser utilizada diariamente como alimento vivo en acuicultura y para la producción de biomasa microalgal y/o pigmentos.
    Description: We report the characterization of a marine microalga of the genus Chroomonas, isolated from a salt lagoon located to the north of Maracaibo, Zulia State, Venezuela. We evaluated the growth and the pigment production in discontinuous culture at different salinites (5, 10, 35, 50, 70 Y 100 ppm),Iight intensites (39,78,117 and 156 µmol quanta.m-2.s-1) and pH (5.0,5.5,6.0,7.0, 8.0 and 9.0). The highest cellular density, 117.99±2.62x106 cel.ml-1, was reached at 35ppm, 156 µmol quanta.m-2.s-1 of light intensity and a pH between 6.0 and 8.0. The cellular content of total chlorophyll and carotenoids increased with the salinity up to 100 ppm, with amounts of 246.55±61.8 and 69.79±18.19 fg.cel-1 respectively. The cellular productivity 4.31x109 cel.l-1d-1 was obteined when the microalga, was grown in semi-continuous culture, at a 2.0 I volume and at a daily renewal rate of 30 % (v/v). The total amount of chlorophyll and carotenoids 1.4 mg.l-1.d-1 and 0.48 mg.l-1.d-1 respectively. This results indicate that this planktonic microalga could be used as daily live food for larvae in aquaculture and for the production of microalgaI biomass and/or pigments.
    Description: Published
    Description: Parapontocaris; Parapontophilus; Prionocrangon
    Keywords: Continental slope
    Repository Name: AquaDocs
    Type: Journal Contribution
    Location Call Number Limitation Availability
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