Abstract The effective population size (Ne) of an organism is expected to be generally proportional the total number individuals in a population. In parasites, we might expect host and body size, because both are increase parasite individuals. However, among other factors, populations sometimes so extremely subdivided that high levels inbreeding may distort these predicted relationships. Here, ...

"The evolution of the Brazilian population size, its growth rate and relative age structure between 1940 and 1991 as well as its expected trajectory until 2020 are presented in this paper. After briefly considering the quasi-stability of the Brazilian population in the past, the role of fast fertility decline is emphasised in the current changing age structure."

Space used by animals increases with increasing body size. Energy requirements alone can explain how population density decreases, but not the steep rate at which home range area increases. We present a general mechanistic model that predicts the frequency of interaction, spatial overlap, and loss of resources to neighbors. Extensive empirical evidence supports the model, demonstrating that spa...

Every research study requires a sound design, careful planning, good management and proper analysis. In some cases, a study is conducted in multiple sites and possibly in different countries, often in order to increase the study sample size or to compare and contrast different study populations. Multi-center studies require co-investigators and research staff not only knowledgeable about the st...

Does evolution proceed faster in larger or smaller populations? The relationship between effective population size (Ne) and the rate of evolution has consequences for our ability to understand and interpret genomic variation, and is central to many aspects of evolution and ecology. Many factors affect the relationship between Ne and the rate of evolution, and recent theoretical and empirical st...

counting the population of insect pests is a key task for planning a successful integrated pest management program. most image processing and machine vision techniques in the literature are very site-specific and cannot be easily re-usable because their performances are highly related to their ground truth data. in this article a new unsupervised image processing method is proposed which is gen...