Physiological and biochemical characterization of new wild strains of Kappaphycus alvarezii (Gigartinales, Rhodophyta) cultivated under land-based hatchery conditions

Narvarte, Bienson Ceasar V.; Hinaloc, Lourie Ann R.; Genovia, Tom Gerald T.; Gonzaga, Shienna Mae C.; Tabonda-Nabor, April Mae; Roleda, Michael Y.

doi:10.1016/j.aquabot.2022.103567

Cited by 12 publications

(6 citation statements)

References 62 publications

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“…Las altas temperaturas y la radiación UV reducen la pigmentación de las macroalgas como la K. alvarezii, asimismo, se identifica en su estudio los bajos resultados en la tasa de crecimiento por los altos valores en estos parámetros, por otro lado cuando la temperatura se mantiene alrededor de los 20° C se obtienen tasas de crecimiento óptimas como es el caso de la especie C. Chamissoi (4 %/día DGR) [43], siendo hasta los 25°C considerada como una temperatura que influye de manera positiva en las macroalgas reduciendo el estrés por el método reproductivo empleado, ya que entre los 30 a 35°C en más de 3 semanas no sobreviven las algas [9]. Por otro lado, afectan la productividad de las esporas, disminución de carragenina, disminución de la tasa de crecimiento de la macroalga, fotosíntesis, entre otros [48].…”

Section: Resultados Y Discusiónunclassified

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Influence of Culture Conditions on the Growth of Red Macroalgae. A systematic review

Vidaurre Castillo,

Zavaleta Portilla,

Silva Chuquipoma

2023

Proceedings of the 21th LACCEI International Multi-Conference for Engineering, Education and Technology (LACCEI 2023): “Leaders

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The objective of the research is to provide information on the culture conditions that influence the growth of red macroalgae. A systematic review was developed selecting 19 articles, they were distributed according to the specific objectives: reproduction method, environmental parameters and culture systems. Among the reproduction methods, asexual propagation is mostly applied, being the tissue cultures with the highest growth rate (7.01 %/day DGR). The environmental parameters for controlled conditions are maintained between 19-31°C temperature, 40-60 μmol photons m-2s-1 of irradiance and natural light hours:darkness, and in the field a temperature of 27-34°C is commonly measured, 28.31 ppt salinity, 6-8 pH,and 5-8 mg/L dissolved oxygen. Among the culture systems, long Line gave higher growth rates (5.84 -7.01 %/day) than "palangre" (2.8-6.18 %/day) in the case of the most studied species, Kappaphycus alvarezii. In conclusion, the method of asexual reproduction, the environmental parameters in culture of temperature, irradiance and light hours:darkness, and field measurements of temperature, salinity, pH and dissolved oxygen; and the use of the Long Line culture system, are the ones that give the highest growth rates for red macroalgae.

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Section: Resultados Y Discusiónunclassified

“…En cuanto al suministro de nutrientes, esta condición es poco evaluada por los autores. Sin embargo, se menciona que favorecen el crecimiento y el aumento del contenido de clorofila de las macroalgas [43] pudiendo proporcionar fácilmente de manera artificial (medios de cultivo) o a través de la recirculación del agua en el cultivo [55].…”

Section: Resultados Y Discusiónunclassified

Influence of Culture Conditions on the Growth of Red Macroalgae. A systematic review

Vidaurre Castillo,

Zavaleta Portilla,

Silva Chuquipoma

2023

Proceedings of the 21th LACCEI International Multi-Conference for Engineering, Education and Technology (LACCEI 2023): “Leaders

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“…are used for agar production (Debbarma et al 2022). The production of K. alvarezii has been consistently increasing since the beginning of its commercial cultivation due to the growing demand (Narvarte et al 2022). In addition to their use in the food, cosmetic, and pharmaceutical industries, macroalgae can be applied in the bioremediation of aquatic environments and can serve as a natural fertilizer in agriculture.…”

Section: Introductionmentioning

confidence: 99%

In vitro assays with Kappaphycus alvarezii for the bioremediation of coastal eutrophic systems in Southeast Brazil

Oliveira-Moreira,

Mello-Guimarães,

Silva

et al. 2024

Preprint

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The commercial alga Kappaphycus alvarezii (Doty) L.M.Liao 1996 may constitute a good bioremediator for eutrophicated coastal environments. In the present research, the ability of K. alvarezii to remove nutrients from the water was tested via in vitro experiments under various conditions. Cultivated K. alvarezii samples were obtained from commercial aquaculture in Angra dos Reis, Brazil, together with large volumes of water from the same area and Rodrigo de Freitas Lagoon, Rio de Janeiro, Brazil. Eight experimental sets were prepared with variable concentrations of nutrients, and pre-weighed pieces of algae, subjected to artificial illumination. The physical-chemical parameters were continuously monitored. Water samples were periodically analyzed for ammonium, nitrite, nitrate, and phosphate. Algal samples were collected at the end of the experiment to quantify biomass growth/decay, nitrogen and phosphorus tissue contents. The ammonium concentration in the water decreased due to preferential consumption of this nutrient by the algae, as well as oxidation. The algae were able to incorporate nutrients in their tissues; however, they were not able to promote a reduction in dissolved concentrations. Nutrient removal rates were elevated and seemed to occur in microcosms at the very beginning of the experiments, but release was observed in the end. However, phosphorus removal was attained in the microcosms that did not receive artificial fertilizers. It was concluded that the use of K. alvarezii as a bioremediator in coastal lagoons is possible, but more complex in vitro and in situ experiments are still necessary for a better understanding of removal processes.

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“…Carrageenan is used as a thickener, emulsion stabiliser and gelling agent in the food industry [10][11][12][13][14][15][16][17]; as a drug delivery agent and bone substitute and in wound dressings in biomedicine [18][19][20]; and as an ingredient in cosmetic products [21]. Depending on the seaweed source, carrageenans differ in the ratio of galactose and anhydro-galactose units and in the content of sulfate groups [22][23][24]. Due to multiple negative charges, carrageenan macromolecules interact strongly with inorganic and organic cations.…”

Section: Introductionmentioning

confidence: 99%

Coagulation of Hydrophobic Ionic Associates of Cetyltrimethylammonium Bromide and Carrageenan

Shyichuk,

Ziółkowska,

Szulc

2023

Molecules

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In aqueous solutions, cetyltrimethylammonium cations bind to carrageenan polyanions, and the resulting ionic associates form macroscopic aggregates due to hydrophobic interaction. At certain ratios of cetyltrimethylammonium to carrageenan, the resulting colloidal particles auto-flocculate. According to visual observations, the ratio ranges from 1 to 3 mmol/g; otherwise the suspensions are stable. By measuring the sedimentation rate and particle size distribution, the most extensive flocculation was found to be from 1.7 to 2.3 mmol/g. The ratio corresponding to the fastest auto-flocculation was precisely determined by titrating the reagents with small increments and recording the turbidity. The turbidimetric titration plots contain distinct break points corresponding to the most extensive flocculation. These break points occur at the same ratio of carrageenan to cetyltrimethylammonium over a wide range of reagent concentrations. The precise values of the critical ratio were found to be 1.78 and 1.53 mmol/g, respectively, during the titration of cetyltrimethylammonium with carrageenan and vice versa. The number of anionic sulfate groups in carrageenan was measured by ICP OES and found to be 1.35 mmol/g. This value is consistent with the critical ratio of the auto-flocculation.

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Physiological and biochemical characterization of new wild strains of Kappaphycus alvarezii (Gigartinales, Rhodophyta) cultivated under land-based hatchery conditions

Cited by 12 publications

References 62 publications

Influence of Culture Conditions on the Growth of Red Macroalgae. A systematic review

Influence of Culture Conditions on the Growth of Red Macroalgae. A systematic review

In vitro assays with Kappaphycus alvarezii for the bioremediation of coastal eutrophic systems in Southeast Brazil

Coagulation of Hydrophobic Ionic Associates of Cetyltrimethylammonium Bromide and Carrageenan

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