Geovanna Parra R

• Doctor of Aquaculture
• PhD at University of Guayaquil

Marine microalgae produce extracellular metabolites such as exopolysaccharides (EPS) with potentially beneficial biological applications to human health, especially antioxidant and antitumor properties, which can be increased with changes in crop trophic conditions. This study aimed to develop the autotrophic and heterotrophic culture of Tetraselmi...

Los pulpos a nivel mundial son uno de los grupos más importantes desde el punto de vista comercial. En Ecuador, su pesquería es artesanal y se realiza tanto en el intermareal como submareal. Sin embargo, su base biológica es aún limitada y escasa. El objetivo de este estudio fue determinar la fecundidad y el desarrollo de los ovocitos de las hembra...

Los microorganismos del medio marino constituyen una importante fuente de compuestos cuya utilización en la prevención y/o tratamiento de enfermedades de etiología viral está siendo sugerida en los últimos años. En concreto, diversos estudios demuestran que los polisacáridos de Porphyridium cruentum presentan funciones biológicas en mamíferos, entr...

Microalgae are successfully adapted to different environments where they metabolize inorganic and, in some cases, organic compounds. The modification of culture conditions can induce the synthesis of exopolysaccharides with potential health benefits. This study aims to adapt the autotrophic culture of the red alga Porphyridium purpureum to a hetero...

The industrial interest in phytoplanktonic microorganisms such as microalgae and cyanobacteria are due to the high biotechnological potential they have in synthesizing bioactive compounds, ease of adapting to different sources of nutrients, extreme survival conditions and the bioabsorbent capacity of heavy metals mainly in wastewater. The objective...

Fish, both wild and farmed, face stressors that alter their homeostasis and adaptive capacity, putting at risk their survival, pollution and changes in water quality affect their health and stress response, cortisol, a glucocorticoid released by the hypothalamus-pituitary-interrenal axis, is key in stress response. The objective of this review is t...

Uno de los aspectos más importantes para una acuacultura sustentable es el manejo adecuado del alimento, para lo cual la mejor estrategia es la implementación de alimentadores automáticos que permiten optimizar las raciones de alimento y optimizar el rendimiento productivo. El presente estudio evaluó el impacto de la alimentación automática sobre l...

Aquaculture nutrition has grown significantly in recent years, and the major investment in feed is focused on the nutritional improvement of the main aquaculture species of commercial interest globally, such as Oreochromis niloticus (Tilapia del Nile). Among the main countries dedicated to its production are several in Latin America, due to its war...

The use of functional feed additives is an important approach to both, prevent and fight, viral diseases in aquaculture. In this regard, microalgae-derived products, and, more specifically, microalgal exopolysaccharides (EPSs), have attracted attention, since multiple biotechnological applications are being described for these molecules. Furthermor...

El cultivo de Oreochromis spp., representa una base económica en diferentes países debido a que la especie muestra diversos grados de tolerancia a factores fisicoquímicos y un rápido crecimiento. En esta investigación se evaluó el efecto de la inclusión de Lens culinaris en dietas de alevines de tilapia. Los alevines tuvieron pesos y tallas similar...

The culture of Oreochromis spp., represents an economic base in different countries because the species shows various degrees of tolerance to physical-chemical factors and rapid growth. In this study, the effect of the inclusion of Lens culinaris in diets of tilapia fingerlings was evaluated. The fingerlings had similar weights and sizes 1.20 g ± 0...