• Evaluación de la acción de saccharomyces boulardii y bacillus spp en la degradación de materia orgánica en sedimentos de camaroneras. 

  Castro Zerda, Jhans Willan; Chamba Cumbicos, Kelvin Emmanuel (Machala : Universidad Técnica de Machala, 2024)

  The accumulation of organic matter in shrimp farm sediments can negatively impact water quality and Litopenaeus vannamei production. This study evaluated the ability of Saccharomyces boulardii and Bacillus spp. to degrade ...
• Evaluación de multicepas para controlar amonio (nh4) en agua de piscinas camaroneras. 

  Matamoros Romero, Geraldine Gissele; Romero Maldonado, Ana Belen (Machala : Universidad Técnica de Machala, 2024)

  The main objective of this research paper is to evaluate the effectiveness of seven Bacillus spp. strains in the ammonia (NH₃) levels reduction in shrimp pool water and its impact on water quality. It focuses on analyzing ...
• Incidencia del peso y densidad de siembra en el crecimiento y supervivencia de litopenaeus vannamei en cultivo. 

  Calozuma Vicente, Byron Andres; Garcia Castillo, Hans Luis (Machala : Universidad Técnica de Machala, 2024)

  The research analyzed the incidence of initial weight and seeding density on the growth and survival of Litopenaeus vannamei, with the objective of optimizing production in aquaculture systems. It was carried out in the ...
• Efecto del tiempo de cultivo en la producción y consumo de oxígeno disuelto en estanques acuícolas 

  Tello Espinoza, Darwin Alexander (Machala : Universidad Técnica de Machala, 2024)

  Aquaculture, especially the production of Pacific white shrimp (Litopenaeus vannamei) in Ecuador, is of great economic and social importance. In shrimp farming systems, ponds are essential for the growth and development ...
• Evaluación de un consorcio de bacillus aisladas del manglar de puerto hualtaco para reducir la materia orgánica en sedimentos acuícolas 

  Romero Requelme, Ariana Jareth; Gualan Salinas, Johanna Margarita (Machala : Universidad Técnica de Machala, 2024)

  The intensification of aquaculture production generates sediments accumulation, that represent a serious problem for this sector. For this reason, the objective of this experimental work was to evaluate the effect of a ...
• Efecto del tipo de alimento en el crecimiento peso/talla del camarón litopenaeus vannamei aplicando predigerido versus alimento comercial. 

  Noblecilla Coello, Eduardo David; Portilla Leiva, Maria Paula (Machala : Universidad Técnica de Machala, 2024)

  The production of Litopenaeus vannamei continues to be problematic in its feeding phase, with its high input costs, mainly due to the dependence on fishmeal in traditional diets. The current proposal to address this problem ...
• Evaluación de dietas balanceadas con la adición de eichhornia crassipes y probióticos para reducir la carga bacteriana en oreochromis sp. 

  Encalada Montalvan, Evelyn Stefany; Silva Ramon, Bryan Joel (Machala : Universidad Técnica de Machala, 2024)

  The use of nutritional additives in the culture of aquatic organisms is essential to help in the growth and health of the animals. The objective of the present study was to evaluate a balanced diet with the addition of ...
• Evaluación in vitro de bacteriófagos en la carga bacteriana de vibrios spp. en el camarón blanco (litopenaeus vannamei). 

  Cueva Chalan, Angie Yulieth; Ibañez Moreno, Kleimer Steeven (Machala : Universidad Técnica de Machala, 2024)

  The objective of this research is to determine the effect of bacteriophages on the bacterial loads of Vibrios spp. in white shrimp through their application in the balanced feed. Different treatments were established with ...
• Evaluación de la genotoxicidad del agua del río 7 en Camilo Ponce Enríquez, provincia El Oro, Ecuador, mediante el test de micronúcleos en juveniles de oreochromis niloticus 

  Roman Mora, Roberto Eduardo; Jaramillo Herrera, Brython Josue (Machala : Universidad Técnica de Machala, 2024)

  This study evaluated the genotoxicity of contaminated water from the Siete River using the micronucleus test in juvenile Oreochromis niloticus. The effects of different dilutions of contaminated water (0%, 10%, 25%, 50%, ...
• Biorremediación de efluentes del cultivo de camarón (litopenaeus vannamei) mediante biopelículas microbianas en un sistema híbrido (zwd-ras-symbiotic) 

  Lojano Torres, Nayeli Brigitte; Coronel Agurto, Rommel Andres (Machala : Universidad Técnica de Machala, 2024)

  Intensive shrimp farming has generated effluents with high concentrations of organic matter and nitrogenous compounds, impacting water quality and promoting the proliferation of pathogenic bacteria. This study evaluated ...
• Determinación de la concentración de bacterias entéricas en anadara tuberculosa del sector puerto hualtaco. 

  Armijos Galarza, Luis Enrique; Gonzalez Matamoros, Viviana Pauleth (Machala : Universidad Técnica de Machala, 2024)

  Population growth and activities associated with urban and industrial development in coastal areas have increased pollution levels in marine ecosystems. The objective of this study is to determine the concentration of total ...
• Efecto de la incorporación de astaxantina a diferentes concentraciones en dieta para litopenaeus vannamei en sistemas de cultivo semi-intensivos. 

  Barragan Alcivar, Edinson Jair; Guerrero Castillo, Joel Mauricio (Machala : Universidad Técnica de Machala, 2024)

  The main objective of this project is to evaluate the effect of incorporating astaxanthin (AX) in diets for Litopenaeus vannamei, focusing on its impact on growth, resistance to stress due to low levels of dissolved oxygen ...
• Aislamiento e identificación microbiológica de consorcios de bacillus aislados del manglar de puerto hualtaco para su uso en acuicultura. 

  Vasquez Balcazar, Ruth Stefania; Saavedra Olives, Rodrigo Manuel (Machala : Universidad Técnica de Machala, 2024)

  This study aimed to isolate and identify Bacillus strains from mangrove sediments in Puerto Hualtaco, Ecuador, to evaluate their potential in aquaculture applications, as well as to analyze the microbial communities present. ...
• Valoración del uso de bacterias nitrificantes para el control de nitritos en cultivos intensivos de camarón (litopenaeus vannamei ). 

  Coronel Ordoñez, Gwen Ibeth; Campoverde Romero, Erick David (Machala : Universidad Técnica de Machala, 2024)

  The use of nitrifying bacteria for nitrite control in intensive shrimp cultures represents a sustainable strategy to improve water quality. In this study, the efficiency of probiotic products composed of Nitrosomonas and ...
• Evaluación comparativa entre alimento vivo y dieta balanceada para la reproducción del pez andinoacara rivulatus en ambiente controlado 

  Armijos Guayllas, Geanella Nicole; Medina Rojas, Karla Mishel (Machala : Universidad Técnica de Machala, 2024)

  Fish farming, especially the reproduction of endemic species, faces technological challenges due to the scarcity of information on their optimal nutritional requirements. Therefore, the present study was carried out to ...
• Evaluación de la resistencia de postlarvas de litopenaeus vannamei a cambios bruscos de salinidad del agua en condiciones de estrés y sin estrés. 

  Orrala Campoverde, Alyson Nicole (Machala : Universidad Técnica de Machala, 2023)

  The cultivation of white shrimp Litopenaeus vannamei holds significant economic importance in aquaculture, but it faces major challenges due to a lack of studies on the tolerance of larvae to wide changes in salinity. This ...
• Efecto de la lenteja de agua (lemna minor) fermentada sobre la reducción de bacterias totales en la tilapia (oreochromis sp.) 

  Ontaneda Apolo, Marcos Geovanny; Cuenca Ullaguari, Mabel Andrea (Machala : Universidad Técnica de Machala, 2023)

  Fish farming is threatened by bacterial diseases, which has increased the importance of looking for natural alternatives for the formulation of aquaculture diets. Fermentation allows improving the nutritional quality of ...
• Efecto del ph en la concentración de bacterias totales durante el proceso de activación de un producto comercial para biorremediación en agua salada en sistemas de acuicultura. 

  Macias De Leon, Lady Brigitte; Farias Espinoza, Freddy Fernando (Machala : Universidad Técnica de Machala, 2023)

  This research examines the effect of pH on the total bacterial concentration during the activation process of a commercial product in saltwater aquaculture systems. pH is a crucial factor that significantly influences ...
• Efecto de la sinergia entre ácido fórmico, formiato de potasio con extracto de orégano en la disminución de la vibriosis 

  Criollo Nivicela, Sara Anahí; Peña Marquez, Maria Jose (Machala : Universidad Técnica de Machala, 2023)

  The cultivation of Litopenaeus vannamei in Ecuador began in the province of El Oro and is identified as one of the most important non-oil export products, making it one of the most relevant activities in the country's ...
• Efecto de la adición de ácidos biliares en la sobrevivencia y crecimiento en el cultivo semi-intensivo de camarón (litopenaeus vannamei) 

  Jumbo Macas, Juan Carlos (Machala : Universidad Técnica de Machala, 2023)

  This study was conducted to investigate the effects of adding bile acids to the diet on growth rate, nutrient utilization by the hepatopancreas and survival of Pacific white shrimp, Litopenaeus vannamei. First, a commercial ...

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