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  • Open Access


    Effect of nitrogen source and concentration to produce proteins in mass cultures of the microalgae Chaetoceros muelleri

    López-Elías JA, R González-Vega, E Márquez-Ríos, W Torres-Arreola

    Phyton-International Journal of Experimental Botany, Vol.84, No.2, pp. 331-337, 2015, DOI:10.32604/phyton.2015.84.331

    Abstract Proteins are one of the major metabolites in biomass from microalgae that constitute the diet of marine organisms grown in aquaculture, and are essential for their growth. The quantity of this component is influenced by nutrients, temperature and light intensity, among others. We examined the growth, biomass production and protein of Chaetoceros muelleri with two sources of nitrogen (nitrate and urea) at three concentrations, using the medium f/2 (0.88 mol/L) (nitrates) as control. The treatments were the medium 2f (3.53 mol/L) and 4f (7.05 mol/L) with NO3-, and the medium f/2 (0.88 mol/L), 2f (3.53mol/L) and 4f (7.05 mol/L) with… More >

  • Open Access


    Productive response of Nannochloropsis oculata, cultured in different media and their efficiency as food for the rotifer Brachionus rotundiformis

    Campaña-Torres A1, LR Martínez-Córdova2, M Martínez-Porchas3, JA López-Elías2, MA Porchas-Cornejo1

    Phyton-International Journal of Experimental Botany, Vol.81, pp. 45-50, 2012, DOI:10.32604/phyton.2012.81.045

    Abstract An experiment was conducted to evaluate the effect of different culture media on the productive response and proximate composition of microalgae, Nannochloropsis oculata, and the subsequent effect of such microalgae on the productive response and proximate composition of the rotifer Brachionus rotundiformis. Microalgae were cultured in different media: Guillard F/2 (control), an agricultural fertilizer, and an aquacultural fertilizer. Thereafter, such microalgae were used to feed rotifers. A better productive response was observed when microalgae were cultured in the agricultural fertilizer. In addition, the chemical proximate composition of microalgae was influenced by the type of culture medium used. When used as… More >

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