16 Result(s)
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Article
David Alvarez
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Article
Open AccessUrban Life Affects Differentiation and Phenotypic Variation but not Asymmetry in a Fully Terrestrial Salamander
The environmental transformations associated with cities are expected to affect organisms at the demographic, phenotypic, and evolutionary level, often negatively. The prompt detection of stressed populations ...
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Illuminating vital surface molecules of symbionts in health and disease
The immunomodulatory surface molecules of commensal and pathogenic bacteria are critical to microorganisms' survival and the host's response1,2. Recent studies have highlighted the unique and important responses ...
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Fast Marching-based globally stable motion learning
In this paper, a novel motion learning method is introduced: Fast Marching Learning (FML). While other learning methods are focused on optimising probabilistic functions or fitting dynamical systems, the propo...
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3D Robot Formations Path Planning with Fast Marching Square
This work presents a path planning algorithm for 3D robot formations based on the standard Fast Marching Square (FM2) path planning method. This method is enlarged in order to apply it to robot formations motion ...
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In vivo imaging and tracking of host–microbiota interactions via metabolic labeling of gut anaerobic bacteria
Fluorescently labeled commensal microbes can be tracked in vivo, allowing visualization of host–microbiota interactions in real time.
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Assessment of census (N) and effective population size (N e ) reveals consistency of N e single-sample estimators and a high N e /N ratio in an urban and isolated population of fire salamanders
Amphibians are the most threatened vertebrates on Earth, and one of the main factors involved in their decline is the loss and fragmentation of their natural habitats. Contemporary urban development is a major...
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Neighbouring populations, opposite dynamics: influence of body size and environmental variation on the demography of stream-resident brown trout (Salmo trutta)
In organisms such as fish, where body size is considered an important state variable for the study of their population dynamics, size-specific growth and survival rates can be influenced by local variation in ...
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Nociceptive sensory neurons drive interleukin-23-mediated psoriasiform skin inflammation
In mice, it is possible to induce a psoriasis-like condition by applying imiquimod; here, the production of interleukin-23 that is stimulated by such skin inflammation is shown to depend on the interaction of ...
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Adaptive evolving strategy for dextrous robotic manipulation
A robot task can be represented as a set of trajectories conformed by a sequence of poses. In this way it is possible to teach a mobile robot to accomplish a manipulation task, and also to reproduce it. Nevert...
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Methamphetamine activates nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) and induces human immunodeficiency virus (HIV) transcription in human microglial cells
Human immunodeficiency virus (HIV) primarily infects glial cells in the central nervous system (CNS). Recent evidence suggests that HIV-infected individuals who abuse drugs such as methamphetamine (METH) have ...
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Open AccessMolecular epidemiology, antimicrobial susceptibilities and resistance mechanisms of Streptococcus pyogenes isolates resistant to erythromycin and tetracycline in Spain (1994–2006)
Group A Streptococcus (GAS) causes human diseases ranging in severity from uncomplicated pharyngitis to life-threatening necrotizing fasciitis and shows high rates of macrolide resistance in several countries. Ou...
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Statistical analysis of structural compensatory growth: how can we reduce the rate of false detection?
Compensatory growth (CG) is a key issue in work aiming at a full understanding of the adaptive significance of growth plasticity and its carryover effects on life-history. The number of studies addressing evol...
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Factors determining tadpole vulnerability to predators: can prior experience compensate for a suboptimal shape?
We investigated the role of constitutive morphology and previous experience in predator avoidance in two anuran species associated with different larval habitats. In Rana temporaria, deeper tails and larger body ...
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Microgeographic variation in metabolic rate and energy storage of brown trout: countergradient selection or thermal sensitivity?
We examined the influence of habitat size, growth opportunity, and the thermal conditions experienced during early development on the standard metabolic rate (SMR) of juvenile brown trout (Salmo trutta) from six ...
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Population trends and reproductive success of the European shag Phalacrocorax aristotelis on the Iberian Peninsula following the Prestige oil spill
In 2003, immediately following the Prestige oil spill in Galicia, Spain, we studied the population trends and reproductive performance of European shags (Phalacrocorax aristotelis) at oiled and unoiled colonies. ...
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Effects of induced variation in anuran larval development on postmetamorphic energy reserves and locomotion
Anuran larvae exhibit high levels of phenotypic plasticity in growth and developmental rates in response to variation in temperature and food availability. We tested the hypothesis that alteration of developme...
