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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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%, ...
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 ...
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 ...
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 ...
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. ...
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 ...
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 ...
Aguilar Loayza, Fabricio Andres(Machala : Universidad Técnica de Machala, 2023)
In Ecuador, aquaculture is based mainly on shrimp production, this activity being the subject of study to improve productive performance, among the various factors the nutrition of this organism stands out. Regarding the ...
Cordova Nole, Juan Pablo(Machala : Universidad Técnica de Machala, 2023)
Organic acids are oxygen-containing compounds derived from hydrocarbons. These compounds are acidic in nature and are known as carboxylic acids. They are found naturally in biological tissues because they are intermediaries ...
Rojas Mosquera, Ronald Ariel(Machala : Universidad Técnica de Machala, 2023)
Shrimp farming is an aquaculture activity of great economic and social importance worldwide. Water quality is a critical factor for the success of this type of culture, since it directly affects the health and growth of ...
Carrillo Castillo, Geovanna Lilibeth(Machala : Universidad Técnica de Machala, 2023)
Fungal diseases in fish are caused by different pathogenic fungi that can have a significant impact on the health of farmed animals. The treatment of this type of infections is important to help maintain good health in ...