Overlapping Generations
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Redescription of immature stages and adults of Nilio (Nilio ) brunneus (Coleoptera: Tenebrionidae: Nilioninae)
ABSTRACT We described immature stages of Nilio (Nilio ) brunneus Thomson, 1860 and provide a supplementary description for adults, including new data on the anatomy of the female and male terminalia. We observed N. brunneus feeding on the lichen Parmotrema sp., and that immature and adult are gregarious, with sessile pupae and generations overlapping. In lab
Zoologia (Curitiba). Publicado em: 06/05/2016
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2. Essays in heterogeneous agent macroeconomics
This thesis is comprised of three chapters. The first article studies the determinants of the labor force participation of elderly American males and investigates the factors that may account for the changes in retirement between 1950 and 2000. We develop a life-cycle general equilibrium model with endogenous retirement that embeds Social Security legislatio
Publicado em: 25/02/2011
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3. Public investment in basic education and economic growth
The main objective of this paper was to visualize the relation between government spending on basic education and the human capital accumulation process, observing the impacts of this spending on individual investments in higher education, and on economic growth. It is used an overlapping-generations model where the government tax the adult generation and sp
Publicado em: 29/06/2010
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4. Morphological and bioecological aspects of Epichrysocaris burwelli (Hymenoptera, Eulophidae) the gall wasp of Corymbia citriodora (Myrtaceae) leaves / Aspectos morfo-bioecológicos de Epichrysocharis burwelli (Eulophidae, Hymenoptera), vespa-das-galhas das folhas de Corymbia citriodora
This research deals with aspects of morphology, biology and ecology of Epichrysocaris burwelli a micro-wasp inducing galls on leaves of Corymbia citriodora, and recently introduced in Brazil. The following parameters were studied: percentage of galls on the leaf, time of adult emergence, adult longevity, sex ratio and characterization of the male, duration o
Publicado em: 2010
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5. Mating and offspring frequencies under partial outcrossing in a structured population
This paper gives a model of a structured population with respect to an autosomal locus with two alleles. The population reproduces in discrete and non-overlapping generations. The population is assumed to be in equilibrium in that exactly the same distribution of genotypic proportions is reproduced in each generation. The population is subdivided into 'local
Genetics and Molecular Biology. Publicado em: 2008
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6. Hymenoptera marking technique
In true social hymenopterans, such as many species of bees, wasps and all species of ants, the main characteristics are the overlapping of generations, the care with the offspring and the division of labor among the members of the colony. The first biological feature means that in a same moment there are groups of individuals, with variable ages, that execut
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2008
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7. Política fiscal e investimento em infra-estrutura no contexto de modelos de gerações superpostas
The economic literature has emphasized the impact of fiscal policy and the incorporation of public capital on the formation of private capital, savings and productivity of labor. In this work, public capital (investment in infrastructure) is one of the factors of production. It was classified as infrastructure the capital that the government invests and imme
Publicado em: 2008
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8. On extending the Hardy-Weinberg law
This paper gives a general mating system for an autosomal locus with two alleles. The population reproduces in discrete and non-overlapping generations. The parental population, the same in both sexes, is arbitrary as is that of the offspring and the gene frequencies of the parents are maintained in the offspring. The system encompasses a number of special c
Genetics and Molecular Biology. Publicado em: 2007
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9. Interações em tres niveis troficos envolvendo galhas de Neolasioptera cupheaeGagne (Diptera, Cecidomyiidae) e seus parasitoides em Cuphea carthagenensis (Jacq.) Macbride (Lythraceae)
Neolasioptera cupheae Gagné (Diptera, Cecidomyiidae) induces a stem gall on the herbaceous pIant Cuphea carthagellellsis (Jacq.) Macbride (Lythraceae). The gall is covered with a dense layer of glandular trichomes which secret a thicky and adhesive substance. In this study we described biological aspects of the gall maker. its population fluctuation and the
Publicado em: 1998
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10. Temporal Allele Frequency Change and Estimation of Effective Size in Populations with Overlapping Generations
In this paper we study the process of allele frequency change in finite populations with overlapping generations with the purpose of evaluating the possibility of estimating the effective size from observations of temporal frequency shifts of selectively neutral alleles. Focusing on allele frequency changes between successive cohorts (individuals born in par
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11. A Note on Effective Population Size with Overlapping Generations
A simple derivation is given for a formula obtained previously for the effective size of random-mating populations with overlapping generations. The effective population size is the same as that for a population with discrete generations having the same variance of lifetime family size and the same number of individuals entering the population per generation
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12. The Dynamics of Finite Haploid Populations with Overlapping Generations. I. Moments, Fixation Probabilities and Stationary Distributions
Much of the work on finite populations with overlapping generations has been limited to deriving effective population numbers with the tacit assumption that the dynamics of the population will be similar to a population with nonoverlapping generations and the appropriate population number. In this paper, some exact and approximate results will be presented o