Rendimiento productivo de la vieja colorada (Mesoheros festae) alimentada con dietas basadas en torta de palmiste durante la etapa juvenil

Background: The increasingly aquaculture development have favored the searching of new protein sources for fish feeding. Goals: 1) trying to present the first data on the culture of an important commercial species in Ecuador, 2) replacing the protein source for feeding in order to minimize the global problem of the fish-based meals in aquaculture. Methods: Guayas cichlid juvenile fish were submitted to 4 feeding treatments: 0%, 4%, 8% and 12% palm cake replacement for 30 days. Several zootechnnical indexes were calculated and analyzed at the end of the experimental culture, as well as the feed proximal composition. Results: The inclusion up to 8% palm cake did not affect the digestibility coefficients of dry matter, gross protein or gross energy.  No differences were found in final weight, growth rate, food conversion rate, protein efficiency rate and productive value of the protein among 0, 4 and 8% palm meal content treatments. As the percentage of palm kernel meal in the diets was increased, the food conversion rate decreased. Increasing palm meal in diets decreased costs.  Conclusions: The productive performance was not affected by the palm cake replacement in diets up to 8% with palm meal, and deriving in lower feed production costs.Antecedentes: La expansión de la acuicultura ha favorecido el estudio de fuentes de proteínas para la alimentación de peces. Objetivos: 1) tratar de presentar los primeros datos sobre el cultivo de una importante especie comercial en Ecuador, 2) reemplazar la fuente de proteína para la alimentación con el fin de minimizar el problema global de las comidas a base de harina de pescado en la acuicultura. Métodos: Juveniles de vieja colorada fueron sometidos a 4 tratamientos de alimentación: 0%, 4%, 8% y 12% de sustitución por torta de palmiste durante 30 días. SE calcularon y analizaron varios índices zootécnicos al final del cultivo experimental, así como la composición proximal de las dietas experimentales. Resultados: La inclusión de hasta un 8% de torta de palmiste no afectó a los coeficientes de digestibilidad de materia seca, proteína bruta o energía bruta. No se encontraron diferencias en peso final, tasa de crecimiento, tasa de eficiencia de la proteína y valor productivo de la proteína entre los tratamientos de 0, 4 y 8% de contenido en torta de palmiste. Conforme creció el porcentaje de torta de palmiste en la dieta aumentó la tasa de conversión del alimento. El aumento de la torta de palmiste en las dietas redujo los costes.  Conclusiones: El rendimiento productivo no se vio afectado por la sustitución de dietas incluyendo hasta un 8% por torta de palmiste, y derivando en menores costes de producción

Bromatological composition of palm kernel meal according to its origin and production periods potential use of palm kernel meal in animal feed

Ecuador has a variety of agroindustrial by-products, which can be used in animal feed, although their nutritional values are often unknown. The objective of this study was to evaluate bromatological composition of palm kernel cake (PKC) in samples from two palm oil extraction plants in two areas (Quevedo and Santo Domingo) and two production periods (August and September). Random samples were taken weekly with two repetitions for a total of 64 samples. Dry matter (DM), ash, organic matter (OM), crude protein (CP), ether extract (EE), crude fibre (CF), nitrogen-free extract (NFE), neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent lignin (ADL), calcium, phosphorus, crude energy (CE) and metabolisable energy (ME) were determined. OM (62.92%) and EE (10.10%) content were higher at the Quevedo plant, while CF (23.84%) and ADL (24.66%) were higher at the Santo Domingo plant. The sampling period affected DM (98.58%), CF (23.98%) and ADL (23.78%) content, which were higher in September, while EE (10.87%) and phosphorus (0.44%) were higher in August. For CP, NFE, NDF, ADF, ash, calcium, CE and ME, interaction was observed between the two factors studied. It was concluded that most of the parameters analysed depend on the place of origin or the extraction season, or interaction between the two factors.The research was supported by the Graduate Department of the State Technical University of Quevedo, with supported from Fourth Notary of the canton Quevedo Los Rios, Ecuador and INIA-FS

Healthcare workers hospitalized due to COVID-19 have no higher risk of death than general population. Data from the Spanish SEMI-COVID-19 Registry

Aim To determine whether healthcare workers (HCW) hospitalized in Spain due to COVID-19 have a worse prognosis than non-healthcare workers (NHCW). Methods Observational cohort study based on the SEMI-COVID-19 Registry, a nationwide registry that collects sociodemographic, clinical, laboratory, and treatment data on patients hospitalised with COVID-19 in Spain. Patients aged 20-65 years were selected. A multivariate logistic regression model was performed to identify factors associated with mortality. Results As of 22 May 2020, 4393 patients were included, of whom 419 (9.5%) were HCW. Median (interquartile range) age of HCW was 52 (15) years and 62.4% were women. Prevalence of comorbidities and severe radiological findings upon admission were less frequent in HCW. There were no difference in need of respiratory support and admission to intensive care unit, but occurrence of sepsis and in-hospital mortality was lower in HCW (1.7% vs. 3.9%; p = 0.024 and 0.7% vs. 4.8%; p<0.001 respectively). Age, male sex and comorbidity, were independently associated with higher in-hospital mortality and healthcare working with lower mortality (OR 0.211, 95%CI 0.067-0.667, p = 0.008). 30-days survival was higher in HCW (0.968 vs. 0.851 p<0.001). Conclusions Hospitalized COVID-19 HCW had fewer comorbidities and a better prognosis than NHCW. Our results suggest that professional exposure to COVID-19 in HCW does not carry more clinical severity nor mortality

Comunicación en el siglo XXI

N.º 79 de la colección Comunicación y Pensamiento. Editora científica, Rosalba Mancinas-ChávezLa comunicación se mueve y germina en inmensos ámbitos, un reflejo es el presente libro que ve la luz gracias al trabajo y colaboración de 12 autores de diversas universidades de España y Latinoamérica que se preocupan por estudiar a la comunicación desde sus distintas líneas de investigación y compartiendo sus conocimientos tanto en español como en portugués.Los capítulos que a continuación veremos, son investigaciones científicas presentadas por sus autores durante el V Congreso Internacional de Comunicación y Pensamiento: Comunicación y juventud. Nuevos medios, usos y consumos, que se desarrolló durante los días 1, 2 y 3 de abril de 2020 en formato online. Es importante mencionar que esta es la primera edición en la historia del congreso que se realiza de manera virtual pero siempre manteniendo la participación activa, el diálogo y la retroalimentación, el trabajo en equipo y la solidaridad académica que caracteriza a este congreso como un punto de encuentro científico internacional