CB García, Luis Orlando Duarte, Daniel von Schiller,
... Colombia (southern Caribbean Sea) Camilo B. García*, Luis Orlando Duarte, Dominique von Schiller Instituto de Investigaciones Marinas y ...
Tópico(s): Coral and Marine Ecosystems Studies
1998 - Inter-Research | Marine Ecology Progress Series
Camilo B. García, Luis Orlando Duarte, Jairo Altamar, Luis Manjarrés,
We conducted a review of historic demersal fish biomass estimates (1970–2001) in the upwelling area off northern Colombia. A clear pattern of decline in demersal fish biomass has been identified. Total demersals and most selected species groups showed a negative trend in mean biomass. Partial recovery in biomass by year 2001 as compared to 1970 was detected, concomitantly with reductions in fishing effort by the shrimp trawling fleet. Triggerfishes and puffers showed an increasing trend in biomass ...
Tópico(s): Marine Bivalve and Aquaculture Studies
2007 - Elsevier BV | Fisheries Research
Luis Orlando Duarte, Camilo B. García,
On the basis of an Ecopath model and Ecosim model simulations, the trophic role of small pelagic fish in the Gulf of Salamanca, a tropical upwelling ecosystem on the Caribbean coast of Colombia, was explored using a combination of fishing vulnerabilities and harvest scenarios. Dynamic simulated changes in the biomass of small pelagic fish caused reallocation of the biomass of higher trophic-level organisms but not of lower trophic-level organisms (plankton). This was attributed to bottom-up control ...
Tópico(s): Coral and Marine Ecosystems Studies
2003 - Elsevier BV | Ecological Modelling
Rodolfo Vögler, Andrés C. Milessi, Luis Orlando Duarte,
Tópico(s): Fish Ecology and Management Studies
2008 - Springer Science+Business Media | Environmental Biology of Fishes
María I. Criales-Hernández, Luis Orlando Duarte, Camilo B. García, Luis Manjarrés,
Tópico(s): Coral and Marine Ecosystems Studies
2006 - Elsevier BV | Fisheries Research
Camilo B. García, Luis Orlando Duarte,
Growth parameters (K, L∞) and mortality rates (M, Z) were estimated for 20 fish populations (L∞ was estimated for six further species) of the Caribbean Sea. Samples were collected during 15 scientific cruises carried out between December 1995 and March 1998 in the Gulf of Salamanca, Colombia. Observed length frequency data were fitted to both standard and modified von Bertalanffy growth models to consider seasonal growth. For those species for which growth parameter sets were available in FishBase ( ...
Tópico(s): Marine Bivalve and Aquaculture Studies
2006 - Wiley | Journal of Applied Ichthyology
Jorge Tam, Sara Purca, Luis Orlando Duarte, Verónica Blaskovic, Pepe Espinoza,
Abstract. Hake (Merluccius gayi peruanus) predation plays an important role in the dynamics of the Humboldt Current ecosystem (HCE). Changes in the hake trophic habits associated with physical variability are expected to impact prey populations and to propagate through the food web. Time series (1995–2002) of (a) stomach contents of hake, (b) biomass estimations of fish prey species of hake, and (c) depth of the 15°C isotherm was analysed with the aim of exploring the impacts of El Niño 1997–1998 on the ...
Tópico(s): Isotope Analysis in Ecology
2006 - Copernicus Publications | Advances in geosciences
Arnoldo Valle‐Levinson, Wolfgang Schneider, Marcus Sobarzo, Mónica Bello, Luis Bravo, Manuel Castillo, Luis Orlando Duarte, Rosalino Fuenzalida, J.M. Gallegos, José Garcés‐Vargas, Jean‐Louis Gonzalez, Dimitri Gutiérrez, Carlos Molinet, M.S. Navarro, Jorge O. Pierini, Efraín Rodríguez Rubio, Alexander Valdenegro, Leonor Vera, Lisette Zenteno,
Hydrographic and underway water velocity profiles were measured at the entrance to Concepción Bay, an equatorward facing embayment in central Chile, in order to illustrate the wind-induced exchange flow. Observations took place over a 25-h period (5–6 January 2002) during the austral summer, which is characterized by upwelling winds in the region. One portion of the observational transect was directly influenced by the wind and the other was protected from such influence by an island. The portion ...
Tópico(s): Ocean Waves and Remote Sensing
2004 - Elsevier BV | Deep Sea Research Part II Topical Studies in Oceanography
Luis Manjarrés, Luis Orlando Duarte, Jairo Altamar, Fabián Escobar-Toledo, Camilo García, Félix Cuello,
Effects of the fisheye bycatch reduction device (BRD) and turtle excluder device (TED) on shrimp retention and bycatch reduction were assessed, aiming to increase sustainability and attenuate the ecological impact of shrimp trawls in the Colombian Caribbean Sea. A total of 88 hauls were carried out in two different periods. The four shrimp trawl nets of the fishing vessel were each equipped with a different device configuration: BRD, TED, TED/BRD, and control (without devices). The highest reduction ...
Tópico(s): Marine Bivalve and Aquaculture Studies
2008 - Instituto Salvatierra | Ciencias Marinas
Luis Orlando Duarte, Paúl Gómez-Canchong, Luis Manjarrés, Camilo B. García, Fabián Escobar-Toledo, Jairo Altamar, Jorge Enrique Viaña, Kenys Tejada, Javier Sánchez, Félix Cuello,
A partir de muestreos realizados a bordo entre julio y septiembre de 2004, se examinaron los cambios asociados con la hora del día en las tasas de captura y estructura de tamaños de los camarones (Farfantepenaeus notialis, F. brasiliensis), las capturas incidentales, los descartes y las 12 especies de peces con mayores capturas en cada una de las dos zonas de pesca (norte y sur) en que opera la flota de arrastre de camarón en el Mar Caribe de Colombia.La tasa de captura de camarón fue significativamente ...
Tópico(s): Coral and Marine Ecosystems Studies
2006 - | Investigaciones marinas
Nuno D. Gouveia, Massimo Lapi, Maurizio Orlando, Duarte M.V. Faria, António Manuel Pinho Ramos,
This paper deals with the experimental and theoretical evaluation of punching shear capacity of steel fiber reinforced concrete (SFRC) slab–column connections. Five experimental specimens with a thickness of 160 mm, different fiber volume contents (0, 1.0, and 1.5%) and different flexural reinforcement ratios (0.75 and 1.5%) have been tested. The experimental results were evaluated using a physical–mechanical model based on the critical shear crack theory (CSCT). The model has given a good approximation ...
Tópico(s): Innovative concrete reinforcement materials
2017 - Wiley | Structural Concrete
Luís G. Dias, Ana C. A. Veloso, Daniela M. Correia, Orlando Rocha, Duarte Torres, Isabel Rocha, L. R. Rodrigues, António M. Peres,
Monitoring the industrial production of galacto-oligosaccharides (GOS) requires a fast and accurate methodology able to quantify, in real time, the substrate level and the product yield. In this work, a simple, fast and inexpensive UV spectrophotometric method, together with partial least squares regression (PLS) and artificial neural networks (ANN), was applied to simultaneously estimate the products (GOS) and the substrate (lactose) concentrations in fermentation samples. The selected multiple models ...
Tópico(s): Probiotics and Fermented Foods
2008 - Elsevier BV | Food Chemistry
Fabián Escobar-Toledo, Manuel J. Zetina‐Rejón, Luis Orlando Duarte,
The highest rates of incidental catch of non-target species is associated with shrimp bottom trawl fisheries. This could lead to adverse effects on the structure and functioning of ecosystems. However, the structural and functional variability of fish communities captured as by-catch from this fishery in the Colombian Caribbean Sea have been poorly documented. We examined commercial fishing hauls in two areas (Gulf of Morrosquillo and adjacent coralline islands) during the rainy and dry seasons. ...
Tópico(s): Marine Bivalve and Aquaculture Studies
2014 - Taylor & Francis | Marine Biology Research
Hugo Folgado, Ricardo Duarte, Orlando Fernandes, Jaime Sampaio,
This study aimed to quantify the time-motion demands and intra-team movement synchronization during the pre-season matches of a professional soccer team according to the opposition level. Positional data from 20 players were captured during the first half of six pre-season matches of a Portuguese first league team. Time-motion demands were measured by the total distance covered and distance covered at different speed categories. Intra-team coordination was measured by calculating the relative phase ...
Tópico(s): Sports Dynamics and Biomechanics
2014 - Public Library of Science | PLoS ONE
Anthony G. Duarte, Orlando Oliveira, Paulo J. Silva,
The dependence of the Landau gauge two-point gluon and ghost correlation functions on the lattice spacing and on the physical volume are investigated for pure SU(3) Yang-Mills theory in four dimensions using lattice simulations. We present data from very large lattices up to ${128}^{4}$ and for two lattice spacings 0.10 fm and 0.06 fm corresponding to volumes of $\ensuremath{\sim}(13\text{ }\text{ }\mathrm{fm}{)}^{4}$ and $\ensuremath{\sim}(8\text{ }\text{ }\mathrm{fm}{)}^{4}$, respectively. Our results show ...
Tópico(s): High-Energy Particle Collisions Research
2016 - American Physical Society | Physical review. D/Physical review. D.
Anthony G. Duarte, Orlando Oliveira, Paulo J. Silva,
The three gluon one particle irreducible function is investigated using lattice QCD simulations over a large region of momentum in the Landau gauge for four-dimensional pure Yang-Mills equations and the SU(3) gauge group. The results favor a zero crossing of the gluon form factor for momenta in the range 220--260 MeV. This zero crossing is required to happen in order to have a properly defined set of Dyson-Schwinger equations. It is also shown that in the high momentum region the lattice results ...
Tópico(s): High-Energy Particle Collisions Research
2016 - American Physical Society | Physical review. D/Physical review. D.
Anthony G. Duarte, Orlando Oliveira, Paulo J. Silva,
The quenched gluon and ghost propagator data published in [1] is reanalysed following the suggestion of [2] to resolve the differences between the infrared data of the simulations. Our results confirms that the procedure works well either for the gluon or for the ghost propagator but not for both propagators simultaneously as the observed deviations in the data follow opposite patterns. Definitive conclusions require improving the determination of the (ratios) of lattice spacings. A simple procedure ...
Tópico(s): High-Energy Particle Collisions Research
2017 - American Physical Society | Physical review. D/Physical review. D.
Produção Nacional
Revisado por pares
Odilon P. Morais Júnior, F. Breseghello, João Batista Duarte, Orlando Peixoto de Morais, P. H. N. Rangel, Alexandre Siqueira Guedes Coelho,
Plant breeding for quantitative traits is a complicated task; thus, the recurrent selection method has been used in the rice ( Oryza sativa L.) breeding program at the Brazilian Agricultural Research Corporation (Embrapa). Our general objective was to assess the effectiveness of this method in achieving genetic progress, maintaining genetic variability, and increasing the potential for selection of superior lines. A genetically broad‐based population of irrigated rice, CNA12S, submitted to three selection ...
Tópico(s): Rice Cultivation and Yield Improvement
2017 - Wiley | Crop Science
Produção Nacional
Revisado por pares
Simone Pinto Carneiro, Karen Vitor Carvalho, Rodrigo Dian de Oliveira Aguiar‐Soares, Cláudia Martins Carneiro, Milton Hércules Guerra de Andrade, Rafael Silva Duarte, Orlando David Henrique dos Santos,
Tuberculosis is an infectious bacterial disease that causes millions of deaths worldwide. Current treatment recommended by WHO is effective, however it is an extensive and arduous process associated to severe adverse effects, which induces a low patient compliance and the emerging of multidrug resistant tuberculosis. Thus, as a main goal of this study, rifampicin nanoparticles were surface functionalized with a tuftsin-modifed peptide to selectively recognize receptors located on infected alveolar ...
Tópico(s): Inhalation and Respiratory Drug Delivery
2018 - Elsevier BV | Colloids and Surfaces B Biointerfaces
Carlos A. Guerra, Manuel Delgado‐Baquerizo, Eliana Duarte, Orlando Marigliano, Christiane Görgen, Fernando T. Maestre, Nico Eisenhauer,
Soil microbes are essential for maintenance of life-supporting ecosystem services, but projections of how these microbes will be affected by global change scenarios are lacking. Therefore, our aim was to provide projections of future soil microbial distribution using several scenarios of global change.Global.1950-2090.Bacteria and fungi.We used a global database of soil microbial communities across six continents to estimate past and future trends of the soil microbiome. To do so, we used structural ...
Tópico(s): Mycorrhizal Fungi and Plant Interactions
2021 - Wiley | Global Ecology and Biogeography
Eliana Duarte, Orlando Marigliano, Bernd Sturmfels,
A discrete statistical model is a subset of a probability simplex. Its maximum likelihood estimator (MLE) is a retraction from that simplex onto the model. We characterize all models for which this retraction is a rational function. This is a contribution via real algebraic geometry which rests on results on Horn uniformization due to Huh and Kapranov. We present an algorithm for constructing models with rational MLE, and we demonstrate it on a range of instances. Our focus lies on models familiar ...
Tópico(s): Topological and Geometric Data Analysis
2020 - Chapman and Hall London | Bernoulli
Produção Nacional
Revisado por pares
Leonardo Medeiros Milhomem, Daniela Medeiros Milhomem-Cardoso, Orlando Milhomem da Mota, Eliane Duarte Mota, Alan Kagan, Jales Benevides Santana Filho,
Tópico(s): Gastrointestinal Tumor Research and Treatment
2020 - Springer Science+Business Media | Surgical Endoscopy
Daniel Oviedo, Orlando Sabogal-Cardona, Natalia Villamizar Duarte, Alexandria Z.W. Chong,
This paper examines the links between perceived liveability and mental health, questioning the role transport-related variables and features of the built environment play in the relationship between the two concepts. By exploring a topic not often tackled from the perspective of transport and health studies, the paper positions the concept of perceived liveability as a mechanism to capture the subjective interpretations of the built environment by residents of different socioeconomic backgrounds ...
Tópico(s): Health disparities and outcomes
2022 - Elsevier BV | Journal of Transport & Health
C. Marrugo, Jairo Altamar, Luis Orlando Duarte,
La captura de elasmobranquios asociada a la pesca artesanal en el golfo de Salamanca ha sido poco estudiada. Particularmente, se carece de evaluaciones del impacto que la actividad extractiva produce sobre las abundancias de estos recursos, por lo cual resulta necesario determinar la composición de las capturas e los artes de pesca y las características constructivas y operativas de dichas artes. Mediante análisis de información de desembarcos pesqueros y de conocimiento tradicional, se evaluó la ...
Tópico(s): Business, Innovation, and Economy
2015 - Universidad de Cartagena | Intropica
Lennin Flórez-Leiva, Luis M. Manjarrés-Martínez, Paúl Gómez-Canchong, Luis Orlando Duarte, Guillermo Díaz-Pulido,
La pesca acompañante se ha convertido en un tema de preocupación mundial debido al impacto que las pesquerías ejercen sobre los ecosistemas marinos. Las evaluaciones de las capturas han hecho énfasis en las especies de peces e invertebrados, pero no existían estudios que evaluaran las comunidades de macroalgas afectadas por la pesca de arrastre, a pesar de que estas comunidades juegan un rol importante en la estructura y complejidad de los ecosistemas marinos. Este estudio evaluó la composición taxonómica ...
Tópico(s): Cephalopods and Marine Biology
2023 - | Revista de la Academia Colombiana de Ciencias Exactas Físicas y Naturales
Orlando Vaselli, Franco Tassi, Eliecer Duarte, E. Fernández, Robert J. Poreda, Antonio Delgado‐Huertas,
Tópico(s): Groundwater and Isotope Geochemistry
2010 - Springer Science+Business Media | Bulletin of Volcanology
Franco Tassi, Orlando Vaselli, Erik Fernandez, Eliecer Duarte, María Martínez, Antonio Delgado‐Huertas, Francesco Bergamaschi,
This paper describes the compositional and morphological features of the crater lakes found in the volcanoes of Rincón de La Vieja, Poás, Irazú, Congo and Tenorio volcanoes (Costa Rica). As evidenced by the distribution of the water and dissolved gas chemistry along vertical profiles, the different fluid sources feeding the lakes reflect the present status of each of the volcanic systems. The chemical features of the Caliente (Poás volcano) and Rincón crater (Rincón de la Vieja volcano) lakes are mainly ...
Tópico(s): Tropical and Extratropical Cyclones Research
2009 - PAGEPress (Italy) | Journal of Limnology
Produção Nacional
Revisado por pares
Ronald Feitosa Pinheiro, Gisele W. B. Colleoni, Otavio C. G. Baiocchi, Fábio R. Kerbauy, Luís C. Duarte, José Orlando Bordin,
Primary malignant breast lymphoma (PBL) is a rare disease with an incidence of 0.04-0.5% of all malignant breast neoplasms. The majority of cases are B-cell lymphomas and the most common histologic type is diffuse large B-cell lymphoma (DLCL). In this study, we report our experience with three cases of PBL. The treatment was the same currently indicated for early stage aggressive NHL, i.e. anthracycline based chemotherapy followed by the involved field radiation therapy. Unfortunately, two patients ...
Tópico(s): Breast Cancer Treatment Studies
2002 - Taylor & Francis | Leukemia & lymphoma/Leukemia and lymphoma
Ricardo Duarte, Duarte Araújo, Orlando Fernandes, Bruno Travassos, Hugo Folgado, Ana Diniz, Keith Davids,
This paper analyzes effects of different practice task constraints on heart rate (HR) variability during 4v4 smallsided football games.Participants were sixteen football players divided into two age groups (U13, Mean age: 12.4±0.5 yrs; U15: 14.6±0.5).The task consisted of a 4v4 sub-phase without goalkeepers, on a 25x15 m field, of 15 minutes duration with an active recovery period of 6 minutes between each condition.We recorded players' heart rates using heart rate monitors (Polar Team System, Polar ...
Tópico(s): Heart Rate Variability and Autonomic Control
2010 - Bentham Science Publishers | The Open Sports Sciences Journal
Ricardo Duarte, Duarte Araújo, Orlando Fernandes, Cristina Fonseca, Vanda Correia, Vítor Gazimba, Bruno Travassos, Pedro Esteves, Luís Vilar, José Lopes,
Background and objective. In the last years, several motion analysis methods have been developed without considering representative contexts for sports performance. The purpose of this paper was to explain and underscore a straightforward method to measure human behavior in these contexts. Material and methods. Procedures combining manual video tracking (with TACTO device) and bidimensional reconstruction (through direct linear transformation) using a single camera were used in order to capture kinematic ...
Tópico(s): Sports injuries and prevention
2010 - Multidisciplinary Digital Publishing Institute | Medicina