Results 21 to 30 of about 2,891,099 (365)
BMJ Open, 2020 Introduction Previous studies have attempted to review the vast body of evidence on adolescent sexual and reproductive health (ASRH), but none has focused on a complete mapping and synthesis of the body of inquiry and evidence on ASRH in sub-Saharan ...
Anthony Idowu Ajayi +6 more
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Journal of the American Mosquito Control Association, 2007 This chapter reviews aspects of population dynamics that may be conceptually important for biological control of mosquitoes. Density dependent population regulation among immature stages has important implications for biological control of mosquito populations, primarily because it can lead to compensatory or overcompensatory mortality due to additions
openaire +2 more sources
Modeling and forecasting sex differences in mortality: a sex-ratio approach
Genus, 2018 Female and male life expectancies have converged in most industrialized societies in recent decades. To achieve coherent forecasts between females and males, this convergence needs to be considered when forecasting sex-specific mortality.
Marie-Pier Bergeron-Boucher +3 more
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BMC Public Health, 2018 Background Reducing lifespan inequality is increasingly recognized as a health policy objective. Whereas lifespan inequality declined with rising longevity in most developed countries, Danish life expectancy stagnated between 1975 and 1995 for females ...
José Manuel Aburto +3 more
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Population Dynamics on Complex Food Webs [PDF]
, 2011 In this work we analyse the topological and dynamical properties of a simple model of complex food webs, namely the niche model. In order to underline competition among species, we introduce "prey" and "predators" weighted overlap graphs derived from the
Barabási A.-L. +5 more
core +2 more sources
The PAT model of population dynamics [PDF]
arXiv, 2021 We introduce a population-age-time (PAT) model which describes the temporal evolution of the population distribution in age. The surprising result is that the qualitative nature of the population distribution dynamics is robust with respect to the birth rate and death rate distributions in age, and initial conditions.
arxiv
Shape of population interfaces as an indicator of mutational instability in coexisting cell populations [PDF]
, 2020 Cellular populations such as avascular tumors and microbial biofilms may "invade" or grow into surrounding populations. The invading population is often comprised of a heterogeneous mixture of cells with varying growth rates. The population may also exhibit mutational instabilities, such as a heavy deleterious mutation load in a cancerous growth.
arxiv +1 more source
Modeling Best Practice Life Expectancy Using Gumbel Autoregressive Models
Risks, 2021 Best practice life expectancy has recently been modeled using extreme value theory. In this paper we present the Gumbel autoregressive model of order one—Gumbel AR(1)—as an option for modeling best practice life expectancy. This class of model represents
Anthony Medford
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Tetranychus evansi spider mite populations suppress tomato defenses to varying degrees
Ecology and Evolution, 2020 Plant defense suppression is an offensive strategy of herbivores, in which they manipulate plant physiological processes to increase their performance. Paradoxically, defense suppression does not always benefit the defense‐suppressing herbivores, because
Bram Knegt +4 more
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A dynamical trichotomy for structured populations experiencing positive density-dependence in stochastic environments [PDF]
(2017) In: Elaydi S., Hamaya Y., Matsunaga H., P\"otzsche C. (eds)
Advances in Difference Equations and Discrete Dynamical Systems. ICDEA 2016.
Springer Proceedings in Mathematics & Statistics, vol 212. Springer,
Singapore, 2017 Positive density-dependence occurs when individuals experience increased survivorship, growth, or reproduction with increased population densities. Mechanisms leading to these positive relationships include mate limitation, saturating predation risk, and cooperative breeding and foraging. Individuals within these populations may differ in age, size, or
arxiv +1 more source