The development of stochastic demography has largely been based on age structured populations, although other types of demographic structure, especially permanent and dynamic heterogeneity, are likely common in natural populations. The combination of stochasticity and demographic structure is a challenge for analyses of population dynamics and extinction risk, because the population structure w...

in the present study, genotyping of six short tandem repeat (str) loci including csf1po, d16s539, f13a01, f13b, lpl and hprtb was performed on genomic dna from 127 unrelated individuals from the iranian province of isfahan. the results indicated that the allele and genotype distributions were in accordance with hardy-weinberg expectations. the observed heterozygosity (ho), expected heterozygosi...

We consider a spiked population model, proposed by Johnstone, whose population eigenvalues are all unit except for a few fixed eigenvalues. The question is to determine how the sample eigenvalues depend on the non-unit population ones when both sample size and population size become large. This paper completely determines the almost sure limits for a general class of samples.

We propose a method for partially discretizing a model of an agedependent population dynamics with an additional structure whose growth rate is age-dependent. We give theoretical conditions under which a second order accuracy arises. A priori estimates are obtained. The main result indicates that the sum of these errors converges and is of second order accuracy.

The ratio of males to females in a population is a meaningful characteristic of sexual species. The reason for this biological property to be available to the observers of nature seems to be a question never asked. Introducing the notion of historically adapted populations as global minimizers of maintenance cost functions, we propose a theoretical explanation for the reported stability of this...

We consider the XXX Bethe equation associated with integral dominant weights of a Kac-Moody algebra and introduce a generating procedure constructing new solutions starting from a given one. The family of all solutions constructed from a given one is called a population. We list properties of populations.

Stochastic models of closed populations predict eventual extinction with certainty. Consequently, their behavior is often characterized by the quasi-stationary state, i.e. the long-term distribution of population sizes conditional on non-extinction. In contrast, models which allow for immigration exhibit a regular stationary state. At the limit of a low immigration rate, a population is expecte...

This symposium explores the forefront of research on population dynamics of mammals by considering population density changes explicitly in the framework of the communities and ecoscapes in which they occur. This approach will not only help us to better understand population behavior, but also will serve to more effectively manage populations of economic and conservation concern. My contributio...

Angiotensin converting enzyme (ACE; OMIM: 106180) has an important role in the conversion of angiotensin I to angiotensin II and degradation of bradykinin. Genetic polymorphism I/D (rs4646994) in the gene encoding ACE has been well defined. To get more insight into the genetic structure of Iranian populations, the distribution of the ACE I/D polymorphism among Iranians was compared with each ot...

The prehistoric populations of humans are an important source of information to analyze some aspects of the modern human societies. Thinking about the human ancestors it is important because it is possible to understand some of the characteristics of humans nowadays. For instance, human behavior or languages structures are some of the elements that could be studied by looking to human evolution...