A5004663506- Coleoptera Taxonomy and Distribution
- Coleoptera: Cerambycidae studies
- Forest Ecology and Biodiversity Studies
- Physiological and biochemical adaptations
- Bat Biology and Ecology Studies
- Lepidoptera: Biology and Taxonomy
- Statistical Distribution Estimation and Applications
- Species Distribution and Climate Change
- Animal Ecology and Behavior Studies
- Statistical Methods and Bayesian Inference
- Forest Insect Ecology and Management
- Avian ecology and behavior
- Animal Behavior and Reproduction
- COVID-19 epidemiological studies
- Bird parasitology and diseases
- Adipose Tissue and Metabolism
- Biological Control of Invasive Species
- Ecology and Vegetation Dynamics Studies
- Inhalation and Respiratory Drug Delivery
- Environmental and Cultural Studies in Latin America and Beyond
- Statistical Methods and Inference
- Animal Nutrition and Physiology
- Rabbits: Nutrition, Reproduction, Health
- Bayesian Methods and Mixture Models
- Mediterranean and Iberian flora and fauna
University of Bío-Bío
2013-2025
Washington University in St. Louis
2023-2024
Baylor College of Medicine
2022-2023
University of Chile
1995-2019
Universidade de Santiago de Compostela
2002-2014
Museo Nacional de Ciencias Naturales
2007
Instituto Universitario General Gutiérrez Mellado
2007
A number of wild bird species have fortuitously incorporated themselves into urban life. One these, the Rufous-collared Sparrow (Zonotrichia capensis), dwells with seemingly similar success in and rural areas. Nevertheless, we found that Sparrows lower body weight, higher blood glucose concentration, proportion heterophils (H), lymphocytes (L), consequently, a larger H:L stress index, than ones. After two weeks captivity birds developed characteristics resembled those birds. These indices...
We analyzed and compared the scaling of both basal maximal thermogenic metabolic rates in passerine nonpasserine birds using conventional phylogenetic methods. In spite presumed adaptive importance traits, few studies concerning their relationships ecological evolutionary constraints have been conducted. found no statistical differences rate between passerines nonpasserines; hence, we suggest use a single allometric regression for this trait birds. addition, were indeed correlated after...
The South American field mouse Abrothrix andinus (Rodentia: Cricetidae) is a small mammal active throughout the year in Andes, despite substantial seasonal environmental changes. Body mass exhibited significant decrease during winter, and maximum metabolic rate for thermoregulation increased by 36.6%. In absolute terms, thermal differential between body temperatures 44° C winter. On other hand, temperature conductance did not show changes through year; however, mass-independent decreased...
Demonstrate the advantages of using ordinal alpha when assumptions for Cronbach's are not met; show usefulness with Chilean version WHO Alcohol Use Disorders Identification Test (AUDIT); and provide commands in R programming language performing respective calculations.Cronbach's were compared an AUDIT questionnaire administered to 419 students at a university.In all domains, result was greater than alpha. This finding consistent literature on subject. When chosen, reliability each domain...
When modeling real-world data, we face the challenge of determining which probability distribution best represents data. To address this intricate problem, rely on goodness-of-fit tests. However, when data come from a bivariate negative binomial distribution, literature reveals no existing test for distribution. For reason, in article, propose and study computationally convenient This is based bootstrap approximation parallelization strategy. end, use reparameterization technique generating...
Abstract A number of wild bird species have fortuitously incorporated themselves into urban life. One these, the Rufous-collared Sparrow (Zonotrichia capensis), dwells with seemingly similar success in and rural areas. Nevertheless, we found that Sparrows lower body weight, higher blood glucose concentration, proportion heterophils (H), lymphocytes (L), consequently, a larger H:L stress index, than ones. After two weeks captivity birds developed characteristics resembled those birds. These...
Seasonal changes in birds' energy requirements as well environmental food availability and quality, influence capability to obtain digest (Karasov 1990). Increased metabolic rates, hypertrophy of the gastrointestinal tract, increased absorption nutrients may be viewed responses ofwintering birds physical biotic seasonal habitats (Sibly 1981, Dykstra Karasov 1992). In central Chile, climate is with warm, dry summers cool rainy winters; mean annual temperature 22.1C minimum 7.7C (di Castri...
During a survey of genetic and species diversity patterns leaf beetle (Coleoptera: Chrysomelidae) assemblages across the Iberian Peninsula we found broad congruence between morphologically delimited variation in cytochrome oxidase (cox1) gene. However, one pair each genera Longitarsus Berthold Pachybrachis Chevrolat was inseparable using molecular methods, whereas diagnostic morphological characters (including male or female genitalia) unequivocally separated named species. Parsimony...
Simulating the probability of type I error is a powerful statistical tool that allows confirming if test achieves established nominal level. However, its computational implementation has drawback significantly long execution times. Therefore, this article analyzes performance two parallel implementations (parRapply and boot) which reduce time simulations for goodness-of-fit bivariate Poisson distribution. The results obtained demonstrate how parallelization strategies accelerate simulations,...
en murciélagos) es relevante por cuanto se encuentra relacionada una parte con la biomecánica y energética del vuelo (
Studies of metabolic capacities in rodents have been largely studied at an inter-specific levels, but physiological populations belonging to the same species received lesser attention.Here we maximum and basal rates two rodent Chroeomys olivaceus dwelling habitats with contrasting temperature rainfall regimes, test if differences are due local adaptation or acclimatization effect.After four weeks acclimation 25 10 ºC, BMR MMR were determined individuals from northern population Caleta Loa,...
In this work we develop a study of positive periodic solutions for mathematical model the dynamics computer virus propagation. We propose generalized compartment SEIR-KS type, since consider that population is partitioned in five classes: susceptible (S); exposed (E); infected (I); recovered (R); and kill signals (K), assume rates propagation are time dependent functions. Then, introduce sufficient condition existence model. The proof main results based on priori estimates system application...