Análisis comparativo del rendimiento de tilapia de la línea hibrido gift (Oreochromis niloticus) utilizando estanques sobre suelo con geomembrana blanca vs negra

RESUMEN: La investigación plantea la búsqueda de alternativas derivadas de la misma, y el comienzo de un proceso que permita al Departamento de Ciencias Agronómicas de la Facultad Multidisciplinaria Oriental de la Universidad de El Salvador iniciar experimentos en serie de esta y otras tecnologías en diferentes especies incluso en camarón de agua dulce, permitiéndonos recomendar con el tenor científico la implantación de nuevas técnicas y conocimientos al servicio de nuestros productores, a la vez que fortalecemos la capacidad técnica de nuestros estudiantes y contribuimos a disminuir la brecha en la relativamente poca oferta de profesionales especializados en este rubro. El presente trabajo tiene como objetivo: realizar un análisis comparativo en el rendimiento de la línea de tilapias hibrido gift utilizando para ello dos tratamientos uno de geomembrana color blanco y el otro de geomembrana color negro en estanques sobre suelo ubicados en el departamento de ciencias agronómicas FMO, para poder comparar dichos tratamientos se midieron nueve variables relacionadas con el rendimiento de la tilapia y con la calidad del agua para el desarrollo de las mismas. Los resultados del experimento fueron evaluados mediante un análisis de varianza; se utilizó un diseño estadístico de comparación de medias para dos grupos, utilizando la prueba de distribución de “t” Student. Se utilizaron 10 peces por observación, haciendo un total de 10 repeticiones por tratamiento, los resultaros indicaron que no existieron diferencias estadísticamente significativas entre los tratamientos, aunque si se aprecia una tendencia en la diferencia de las medias en cada una de las variables por cada tratamiento. ABSTRACT: The research proposes the search for alternatives derived from it, and the beginning of a process that allows the Department of Agronomic Sciences of the Oriental Multidisciplinary Faculty of the University of El Salvador to initiate serial experiments of this and other technologies in different species even in freshwater shrimp, allowing us to recommend with the scientific tenor the implementation of new techniques and knowledge at the service of our producers, while strengthening the technical capacity of our students and helping to reduce the gap in the relatively small supply of professionals specialized in this item. The present work aims to: carry out a comparative analysis on the performance of the gift hybrid tilapia line using two treatments, one with a white geomembrane and the other with a black geomembrane in above-ground ponds located in the department of agronomic sciences FMO In order to compare these treatments, nine variables related to tilapia performance and water quality were measured for their development. The results of the experiment were evaluated by means of an analysis of variance; A statistical design of comparison of means for two groups was used, using the Student “t” distribution test. 10 fish were used per observation, making a total of 10 repetitions per treatment, the results indicated that there were no statistically significant differences between the treatments, although there is a trend in the difference of the means in each of the variables for each treatmen

Evaluation of a quality improvement intervention to reduce anastomotic leak following right colectomy (EAGLE): pragmatic, batched stepped-wedge, cluster-randomized trial in 64 countries

Background Anastomotic leak affects 8 per cent of patients after right colectomy with a 10-fold increased risk of postoperative death. The EAGLE study aimed to develop and test whether an international, standardized quality improvement intervention could reduce anastomotic leaks. Methods The internationally intended protocol, iteratively co-developed by a multistage Delphi process, comprised an online educational module introducing risk stratification, an intraoperative checklist, and harmonized surgical techniques. Clusters (hospital teams) were randomized to one of three arms with varied sequences of intervention/data collection by a derived stepped-wedge batch design (at least 18 hospital teams per batch). Patients were blinded to the study allocation. Low- and middle-income country enrolment was encouraged. The primary outcome (assessed by intention to treat) was anastomotic leak rate, and subgroup analyses by module completion (at least 80 per cent of surgeons, high engagement; less than 50 per cent, low engagement) were preplanned. Results A total 355 hospital teams registered, with 332 from 64 countries (39.2 per cent low and middle income) included in the final analysis. The online modules were completed by half of the surgeons (2143 of 4411). The primary analysis included 3039 of the 3268 patients recruited (206 patients had no anastomosis and 23 were lost to follow-up), with anastomotic leaks arising before and after the intervention in 10.1 and 9.6 per cent respectively (adjusted OR 0.87, 95 per cent c.i. 0.59 to 1.30; P = 0.498). The proportion of surgeons completing the educational modules was an influence: the leak rate decreased from 12.2 per cent (61 of 500) before intervention to 5.1 per cent (24 of 473) after intervention in high-engagement centres (adjusted OR 0.36, 0.20 to 0.64; P < 0.001), but this was not observed in low-engagement hospitals (8.3 per cent (59 of 714) and 13.8 per cent (61 of 443) respectively; adjusted OR 2.09, 1.31 to 3.31). Conclusion Completion of globally available digital training by engaged teams can alter anastomotic leak rates. Registration number: NCT04270721 (http://www.clinicaltrials.gov)