1,086 research outputs found
Modeling discards in Trawling Mediterranean Northern Alboran Sea Fishery
Target and Bycatch species metrics estimated from fishery-dependent data were explored to assess their use in governance of habitat conservation in respect to fisheries. Fishing data collected by onboard observers in otter-trawl boats between 2011 and 2012 at monthly sampling frequency in the Alboran Sea (Western Mediterranean) were used to build maps of sensitivity to fishing stress. Maps were drawn by means kriging interpolation techniques of biomass and abundance (Catch Per Unit of Effort, CPUE) in kilogram and number per fishing hour of blue whiting (Micromesistius poutassou), European hake (Merluccius merluccius), and red mullets (Mullus barbatus and Mullus surmuletus) target species, seabreams (Pagellus acarne, Pagellus bogaraveo, and Pagellus erythrinus), and mackerels (Trachurus mediterraneus, Trachurus trachurus, and Trachurus picturatus) bycatch species and Bogue (Boops boops) bycatch discarded species. Modelling discards by means Generalised Additive Models (GAMs) use environmental (sea surface temperature and chlorophyll-a from satellite data and NAO climatic index); spatial (latitude, longitude, depth and port) and temporal (season, haul duration, moon phase), as well as technical (boat length and power) explanatory variables. The main causes of discards, for both target and bycatch species, are associated to the seasonality of the recruitment and the changes on the spatial distribution of habitat preferences along their ontogeny. Environmental variables did not reveal significant effects, showing that operational oceanography standard products must be not enough to assess discards, and therefore products providing information on specific ecological processes to discards must be designed with this purpose. In Bycatch species, such as sea breams, mackerels and bogue, discards were also highly dependent of the port and boat (fleet/boat strategies, power, etc, and market preferences). The higher discards corresponded to these bycatch pelagic or bentho-pelagic species. Keywords: Discards, Otter-trawl fisheries, fishery conservation, operational oceanography, spatial modelin
Reliability of a handball specific strength test battery and the association with sprint and throwing performance in young handball players
[EN] BACKGROUND: A greater motivation for coaches to be more involved in assessment could be the development of specific strength tests closer to specific handball tasks. Therefore, the aims were to determine the reliability of a handball specific strength test battery in young handball players using a functional electromechanical dynamometer (FEMD) and to evaluate the association between the strength test battery and performance measurements. METHODS: Thirty-two young handball players (25% males and 75% females) performed a repeated-measurement design over four weeks. The players conducted one session per week, with each measurement consisting of two isometric tests to obtain isometric peak force, and four incremental tests. Moreover, performance handball tests (sprint and throwing velocity [TV]) were recorded. RESULTS: The reliability of the whole handball specific strength tests was very high for the peak and mean strength (ICC=0.70-0.85; CV=8.49- 13.99; SEM=0.44-0.67 kg). The step forward had a moderate association with 5 to 10 meters’ time. The highest correlation between TVmean was found with the peak strength of standing lift and between TVpeak with peak strength of unilateral throw. The sprint total time could be explained by Body Mass Index and peak strength of the standing lift in the 40% and the TVpeak could be explained by arm span and mean strength of the standing lift in the 68%. CONCLUSIONS: The high reliability for all exercises and the significant correlation with handball performance (sprint time and TV) allow us to include these tests in handball team evaluation and training.S
From individuals’ movement to range shifts: integration of movement data in individual-based models to assess global change effects on populations
El estudio del movimiento de los individuos informa directamente sobre los tamaños de las áreas de campeo, las rutas migratorias o la selección de hábitat. Pero, además, la integración de datos de movimiento en modelos ecológicos permite además abordar mayores escalas. En este trabajo mostramos los resultados de nuestra línea de investigación utilizando STEPLAND, un modelo basado en el individuo de desarrollo propio. El modelo se parametrizó con datos de movimiento, demográficos y genéticos de tortugas terrestres (Testudo graeca) del SE de España. Llevamos a cabo diferentes experimentos de simulación con el fin de contestar a cuestiones sobre los efectos del cambio global en la conservación de la especie. A nivel de especie, identificamos aquellos rasgos evolutivos de las tortugas, como el almacenamiento de esperma por parte de las hembras, que evitan las extinciones en hábitats antropizados. A escala de paisaje, evaluamos el impacto del abandono agrícola y la intensificación en la dinámica poblacional de esta especie de vida larga. La intensificación afectó negativamente las tasas reproductivas, la densidad de población y la probabilidad de extinción de T. graeca, con respuestas de retardo de 20, 30 y 130 años respectivamente. Finalmente, en un contexto regional, pretendemos simular las primeras etapas de una expansión. Los primeros resultados sugieren patrones característicos de surfing genético, un proceso que afecta la expansión de especies de baja dispersión afectadas por deriva genética. Creemos que nuestra línea de investigación ejemplifica bien que el valor científico de los datos de movimiento excede el nivel de individuo.The study of the movement of individuals directly informs about home-range sizes, migratory routes or habitat selection. But also, integrating movement into ecological models allows for larger-scale studies. Here we summarize the results of our line of research based in the individual-based model STEPLAND. The model was parameterized with movement, demographic and genetic data of spur-thighed tortoises (Testudo graeca) in SE Spain. We developed different simulation experiments to answer questions about the effects of global change on the conservation of this species. At the species level, we identified those evolutionary traits of tortoises, such as female sperm storage, that prevent extinctions in human-altered habitats. At landscape scale, we assessed the impact of agricultural abandonment and agricultural intensification on the population dynamics of this long-lived species. Only agricultural intensification negatively affected reproductive rates, population density, and probability of extinction of T. graeca, with time-lag responses of 20, 30 and 130 years respectively. Finally, in a regional context, we aim to simulate the early stages of a range expansion. Preliminary results reveal patterns compatible to “genetic surfing”, a process affecting the expansion of low dispersal species impacted by strong genetic drift. We believe that our line of research exemplifies well that the scientific value of movement data goes well beyond the individual level.Esta línea de investigación se ha sufragado con las ayudas PID2019-105682RA-I00, financiada por MCIN/AEI/10.13039/501100011033; y por CGL2015-64144, con financiación de MINECO/FEDER (UE). El contrato de R.C.R.C. se sufraga con una ayuda del programa María Zambrano (ZAMBRANO 21-26), con fondos European Union-Next Generation (EU). A.S.A. y J.D.A. cuentan con ayudas Ramón y Cajal del Ministerio de Ciencia (RYC-2017-22796 y RYC-2017-22783, respectivamente). M.V.J.F. tiene un contrato Juan de la Cierva Incorporación (IJC2019-039145-I) de este mismo organismo y ella y A.S.A. cuentan con financiación a Grupos Emergentes (CIGE/2021/157) de GVA
RETOS Y OPORTUNIDADES EN LA INTEGRACIÓN DE SOCIEDADES COOPERATIVAS
La presente publicación contiene las actas del Curso de Verano titulado “Retos y oportunidades en la integración de cooperativas” que se celebró en la sede de la Cartuja de Sevilla de la Universidad Internacional de Andalucía (UNIA) entre los días 11 a 15 de septiembre de 2017 y que se organizó en el marco del Proyecto Investigación de Excelencia de la Junta de Andalucía "Retos y oportunidades en la concentración e integración de empresas agroalimentaria" (P12-SEJ-2555) del que el profesor Vargas Vasserot es el Investigador Principal. Una de las peculiaridades que tuvo el curso es que gran parte de los asistentes eran a su vez especialistas en las materias impartidas y miembros del proyecto de investigación de la Junta de Andalucía que organizaba el curso, por lo que con objeto de darle mayor participación se habilitó la posibilidad de presentar comunicaciones científicas, como si fuera un congreso. Una vez terminado el curso, se vio que los materiales facilitados a los alumnos por los distintos profesores del curso junto a las comunicaciones científicas presentadas por parte de los asistentes era un material que debía ser puesto a disposición de todas las personas e instituciones interesadas en los procesos de integración de cooperativas y, además, sin mucha demora por la importancia que actualmente tienen todas estas cuestiones. Además de las ponencias y comunicaciones que se presentarons, hemos includio en la publicación un anexo con legislación y normativa de interés y los resultados de una encuesta sobre los procesos de integración realizada en el sector hortofrutícola almeriense que realizamos a lo largo de 2016 en el marco del citado proyecto de investigación de la Junta de Andalucía
Impact of time to intubation on mortality and pulmonary sequelae in critically ill patients with COVID-19: a prospective cohort study
Question: We evaluated whether the time between first respiratory support and intubation of patients receiving invasive mechanical ventilation (IMV) due to COVID-19 was associated with mortality or pulmonary sequelae.
Materials and methods: Prospective cohort of critical COVID-19 patients on IMV. Patients were classified as early intubation if they were intubated within the first 48 h from the first respiratory support or delayed intubation if they were intubated later. Surviving patients were evaluated after hospital discharge.
Results: We included 205 patients (140 with early IMV and 65 with delayed IMV). The median [p25;p75] age was 63 [56.0; 70.0] years, and 74.1% were male. The survival analysis showed a significant increase in the risk of mortality in the delayed group with an adjusted hazard ratio (HR) of 2.45 (95% CI 1.29-4.65). The continuous predictor time to IMV showed a nonlinear association with the risk of in-hospital mortality. A multivariate mortality model showed that delay of IMV was a factor associated with mortality (HR of 2.40; 95% CI 1.42-4.1). During follow-up, patients in the delayed group showed a worse DLCO (mean difference of - 10.77 (95% CI - 18.40 to - 3.15), with a greater number of affected lobes (+ 1.51 [95% CI 0.89-2.13]) and a greater TSS (+ 4.35 [95% CI 2.41-6.27]) in the chest CT scan.
Conclusions: Among critically ill patients with COVID-19 who required IMV, the delay in intubation from the first respiratory support was associated with an increase in hospital mortality and worse pulmonary sequelae during follow-up.The study was supported in part by ISCIII (CIBERESUCICOVID, COV20/00110), co‑funded by ERDF, “Una manera de hacer Europa” and Donation pro‑gram "estar preparados". UNESPA. Madrid. Spain David de Gonzalo Calvo acknowledges receiving financial support from Instituto de Salud Carlos III (ISCIII); Miguel Servet 2020: CP20/00041), co‑funded by the European Social Fund (ESF), “Investing in your future”. JdB acknowledges receiving financial support from Instituto de Salud Carlos III (Miguel Servet 2019: CP19/00108), co‑funded by European Regional European Social Fund (ESF), “Investing in your future
Identifying comorbidities and lifestyle factors contributing to the cognitive profile of early Parkinson's disease
Background: Identifying modifiable risk factors for cognitive impairment in the early stages of Parkinson's disease (PD) and estimating their impact on cognitive status may help prevent dementia (PDD) and the design of cognitive trials. Methods: Using a standard approach for the assessment of global cognition in PD and controlling for the effects of age, education and disease duration, we explored the associations between cognitive status, comorbidities, metabolic variables and lifestyle variables in 533 PD participants from the COPPADIS study. Results: Among the overall sample, 21% of participants were classified as PD-MCI (n = 114) and 4% as PDD (n = 26). The prevalence of hypertension, diabetes and dyslipidemia was significantly higher in cognitively impaired patients while no between-group differences were found for smoking, alcohol intake or use of supplementary vitamins. Better cognitive scores were significantly associated with regular physical exercise (p < 0.05) and cognitive stimulation (< 0.01). Cognitive performance was negatively associated with interleukin 2 (Il2) (p < 0.05), Il6 (p < 0.05), iron (p < 0.05), and homocysteine (p < 0.005) levels, and positively associated with vitamin B12 levels (p < 0.005). Conclusions: We extend previous findings regarding the positive and negative influence of various comorbidities and lifestyle factors on cognitive status in early PD patients, and reinforce the need to identify and treat potentially modifiable variables with the intention of exploring the possible improvement of the global cognitive status of patients with PD
β-Lactam Effects on Mixed Cultures of Common Respiratory Isolates as an Approach to Treatment Effects on Nasopharyngeal Bacterial Population Dynamics
BACKGROUND: Streptococcus pneumoniae, Streptococcus pyogenes and Haemophilus influenzae are bacteria present in the nasopharynx as part of normal flora. The ecological equilibrium in the nasopharynx can be disrupted by the presence of antibiotics. METHODOLOGY/PRINCIPAL FINDINGS: A computerized two-compartment pharmacodynamic model was used to explore beta-lactam effects on the evolution over time of a bacterial load containing common pharyngeal isolates by simulating free serum concentrations obtained with amoxicillin (AMX) 875 mg tid, amoxicillin/clavulanic acid (AMC) 875/125 mg tid and cefditoren (CDN) 400 mg bid regimens over 24 h. Strains and MICs (microg/ml) of AMX, AMC and CDN were: S. pyogenes (0.03, 0.03 and 0.015), S. pneumoniae (2, 2 and 0.25), a beta-lactamase positive H. influenzae (BL(+); >16, 2 and 0.06) and a beta-lactamase positive AMC-resistant H. influenzae (BLPACR, >16, 8 and 0.06). Mixture of identical 1:1:1:1 volumes of each bacterial suspension were prepared yielding an inocula of approximately 4 x 10(6) cfu/ml. Antibiotic concentrations were measured both in bacterial and in bacteria-free antibiotic simulations. beta-lactamase production decreased AMX concentrations and fT(>MIC) against S. pneumoniae (from 43.2% to 17.7%) or S. pyogenes (from 99.9% to 24.9%), and eradication was precluded. The presence of clavulanic acid countered this effect of co-pathogenicity, and S. pyogenes (but not BL(+) and S. pneumoniae) was eradicated. Resistance of CDN to TEM beta-lactamase avoided this co-pathogenicity effect, and CDN eradicated S. pyogenes and H. influenzae strains (fT(>MIC) >58%), and reduced in 94% S. pneumoniae counts (fT(>MIC) approximately 25%). CONCLUSIONS/SIGNIFICANCE: Co-pathogenicity seems to be gradual since clavulanic acid countered this effect for strains very susceptible to AMX as S. pyogenes but not for strains with AMX MIC values in the limit of susceptibility as S. pneumoniae. There is a potential therapeutic advantage for beta-lactamase resistant cephalosporins with high activity against streptococci
Nonsequential neural network for simultaneous, consistent classification, and photometric redshifts of OTELO galaxies
[Context]: Computational techniques are essential for mining large databases produced in modern surveys with value-Added products.
[Aims]: This paper presents a machine learning procedure to carry out a galaxy morphological classification and photometric redshift estimates simultaneously. Currently, only a spectral energy distribution (SED) fitting has been used to obtain these results all at once.
[Methods]: We used the ancillary data gathered in the OTELO catalog and designed a nonsequential neural network that accepts optical and near-infrared photometry as input. The network transfers the results of the morphological classification task to the redshift fitting process to ensure consistency between both procedures.
[Results]: The results successfully recover the morphological classification and the redshifts of the test sample, reducing catastrophic redshift outliers produced by an SED fitting and avoiding possible discrepancies between independent classification and redshift estimates. Our technique may be adapted to include galaxy images to improve the classification.This work was supported by the project Evolution of Galaxies, of reference AYA2014-58861-C3-1-P and AYA2017-88007-C3-1-P, within the “Programa estatal de fomento de la investigación científica y técnica de excelencia del Plan Estatal de Investigación Científica y Técnica y de Innovación (2013-2016” of the “Agencia Estatal de Investigación del Ministerio de Ciencia, Innovación y Universidades”, and co-financed by the FEDER “Fondo Europeo de Desarrollo Regional”. JAD is grateful for the support from the UNAM-DGAPA-PASPA 2019 program, the UNAM-CIC, the Canary Islands CIE: Tricontinental Atlantic Campus 2017, and the kind hospitality of the IAC. MP acknowledges financial supports from the Ethiopian Space Science and Technology Institute (ESSTI) under the Ethiopian Ministry of Innovation and Technology (MoIT), and from the Spanish Ministry of Economy and Competitiveness (MINECO) through projects AYA2013-42227-P and AYA2016-76682C3-1-P, and from the Spanish Ministerio de Ciencia e Innovación – Agencia Estatal de Investigación through projects PID2019-106027GB-C41 and AYA2016-76682C3-1-P. APG, MSP and RPM were supported by the PNAYA project: AYA2017–88007–C3–2–P. JG was supported by the PNAYA project AYA2018–RTI-096188-B-i00. MC & APG are also funded by Spanish State Research Agency grant MDM-2017-0737 (Unidad de Excelencia María de Maeztu CAB). JIGS receives support through the Proyecto Puente 52.JU25.64661 (2018) funded by Sodercan S.A. and the Universidad de Cantabria, and PGC2018–099705–B–100 funded by the Ministerio de Ciencia, Innovación y Universidades. EJA acknowledges funding from the State Agency for Research of the Spanish MCIU through the “Center of Excellence Severo Ochoa” award to the Instituto de Astrofísica de Andalucía (SEV-2017-0709) and from grant PGC2018-095049-B-C21. Based on observations made with the Gran Telescopio Canarias (GTC), installed in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias, in the island of La Palma. This work is (partly) based on data obtained with the instrument OSIRIS, built by a Consortium led by the Instituto de Astrofísica de Canarias in collaboration with the Instituto de Astronomía of the Universidad Autónoma de México. OSIRIS was funded by GRANTECAN and the National Plan of Astronomy and Astrophysics of the Spanish Government.Peer reviewe
Inhibition of Gastric Lipase as a Mechanism for Body Weight and Plasma Lipids Reduction in Zucker Rats Fed a Rosemary Extract Rich in Carnosic Acid
BACKGROUND: Rosemary (Rosmarinus officinalis L.) extracts (REs) exhibit hepatoprotective, anti-obesity and anti-inflammatory properties and are widely used in the food industry. REs are rich in carnosic acid (CA) and carnosol which may be responsible for some of the biological activities of REs. The aim of this study was to investigate whether inhibition of lipase activity in the gut may be a mechanism by which a RE enriched in CA (40%) modulates body weight and lipids levels in a rat model of metabolic disorders and obesity. METHODS AND PRINCIPAL FINDINGS: RE was administered for 64 days to lean (fa/+) and obese (fa/fa) female Zucker rats and body weight, food intake, feces weight and blood biochemical parameters were monitored throughout the study. Lipase activity (hydrolysis of p-nitrophenylbutyrate) was measured in the gastrointestinal tract at the end of the study and the contents of CA, carnosol and methyl carnosate were also determined. Sub-chronic administration of RE moderately reduced body weight gain in both lean and obese animals but did not affect food intake. Serum triglycerides, cholesterol and insulin levels were also markedly decreased in the lean animals supplemented with RE. Importantly, lipase activity was significantly inhibited in the stomach of the RE-supplemented animals where the highest content of intact CA and carnosol was detected. CONCLUSIONS: Our results confirm that long-term administration of RE enriched in CA moderates weight gain and improves the plasma lipids profile, primarily in the lean animals. Our data also suggest that these effects may be caused, at least in part, by a significant inhibition of gastric lipase and subsequent reduction in fat absorption
Clinical Audits in Outpatient Clinics for Chronic Obstructive Pulmonary Disease: Methodological Considerations and Workflow
Objectives:
Previous clinical audits for chronic obstructive pulmonary disease (COPD) have provided valuable information on the clinical care delivered to patients admitted to medical wards because of COPD exacerbations. However, clinical audits of COPD in an outpatient setting are scarce and no methodological guidelines are currently available. Based on our previous experience, herein we describe a clinical audit for COPD patients in specialized outpatient clinics with the overall goal of establishing a potential methodological workflow.Methods:
A pilot clinical audit of COPD patients referred to respiratory outpatient clinics in the region of Andalusia, Spain (over 8 million inhabitants), was performed. The audit took place between October 2013 and September 2014, and 10 centers (20% of all public hospitals) were invited to participate. Cases with an established diagnosis of COPD based on risk factors, clinical symptoms, and a post-bronchodilator FEV1/FVC ratio of less than 0.70 were deemed eligible. The usefulness of formally scheduled regular follow-up visits was assessed. Two different databases (resources and clinical database) were constructed. Assessments were planned over a year divided by 4 three-month periods, with the goal of determining seasonal-related changes. Exacerbations and survival served as the main endpoints.Conclusions:
This paper describes a methodological framework for conducting a clinical audit of COPD patients in an outpatient setting. Results from such audits can guide health information systems development and implementation in real-world settings.This study was financially supported by an unrestricted grant from Laboratorios Menarini, SA (Barcelona, Spain)
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