نتایج جستجو برای: population growth indices
تعداد نتایج: 1529931 فیلتر نتایج به سال:
Thalassemia minor (MT), either β or α, is the most frequent single gene mutation in human beings affecting 6% of population worldwide. It more Mediterranean region, Africa and South-East Asia. On other hand Iron deficiency anemia (IDA), nutritional secondary to gastrointestinal menstrual bleeding, cause acquired anemia. Differentiation between these two types important because both them present...
Introduction: Immunization and growth monitoring (GM) are the most important primary health cares (PHC) during infancy. Based on the results of national health survey in Iran, Hormozgan province has one of the poorest indices in immunization and GM in comparison with other provinces. The present study aimed at determining the status of these two important indices in infants and mothers’ aware...
Little is known about the ecology and demography of the genus Magnolia. Magnolia dealbata Zucc. is an endangered species endemic to Mexico. Two contrasting populations of M. dealbata (one from the grasslands and other from a secondary cloud forest) were studied. We asked the following questions: (a) Are size structure (diameter at breast height, DBH) and infrutescence production significantly d...
BACKGROUND AND AIMS Evaluation of population projection matrices (PPMs) that are focused on asymptotically based properties of populations is a commonly used approach to evaluate projected dynamics of managed populations. Recently, a set of tools for evaluating the properties of transient dynamics has been expanded to evaluate PPMs and to consider the dynamics of populations prior to attaining ...
The population growth rate, or intrinsic rate of increase, is the rate of growth that will be achieved by a population with fixed vital rates. The sensitivity of population growth rate to changes in the vital rates can be written in terms of the stable stage or age distribution and the reproductive value distribution. If the vital rate measures the rate of production of one type of individual b...
The evolution of population dynamics in a stochastic environment is analysed under a general form of density-dependence with genetic variation in r and K, the intrinsic rate of increase and carrying capacity in the average environment, and in sigma(e)(2), the environmental variance of population growth rate. The continuous-time model assumes a large population size and a stationary distribution...
During the early to mid-1990s, the pace of economic growth in the South was broadly comparable with that in the rest of the United Kingdom. During 1996–98, however, the pace of activity in the South strengthened considerably relative to the rest of the country. This article investigates one possible explanation for divergences in growth between the two regions—namely differences in the relative...
BACKGROUND The consequences of in utero growth restriction have been attracting scholarly attention for the past two decades. Nevertheless, the diagnosis of growth-restricted neonates is as yet an unresolved issue. Aim of this study is the evaluation of the performance of simple, common indicators of nutritional status, which are used in the identification of growth-restricted neonates. METHO...
Evaluating tree competition indices as predictors of basal area increment in western Montana forests
0378-1127/$ see front matter 2011 Elsevier B.V. A doi:10.1016/j.foreco.2011.08.031 ⇑ Corresponding author. Tel.: +1 859 257 5666; fax E-mail addresses: [email protected] (M.A umontana.edu (D. Affleck), woodam.chung@umontan Fire hazard reduction treatments are commonly applied to mixed-species coniferous forests in western Montana, USA, to modify fuels structures and alter the competitive ...
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