ISSN 10227954, Russian Journal of Genetics, 2013, Vol. 49, No. 12, pp. 1219–1226. © Pleiades Publishing, Inc., 2013.
Original Russian Text © L.A. Atramentova, I.P. Meshcheryakova, O.V. Filiptsova, 2013, published in Genetika, 2013, Vol. 49, No. 12, pp. 1398–1406.
The characteristics of natural selection depend on
the reproductive behavior and, in turn, are determined
by the cultural, ethnic, and religious diversity of the
population [1, 2]. The vital characteristics of human
reproduction allow us to estimate the intensity of nat
The prevalence of monogamous marriages in the
modern world has led to a tendency of lower fertility
and greater interest in the survival of offspring among
parents . This trend is peculiar to different ethnic
groups in both urban and rural populations [4–6] and
currently continues due to the improvement of health
care and the use of contraception [7–13].
The general time trend and dynamics of the indi
vidual components of the index of total selection
related to differential mortality (
) and fertility (
the population of most countries in the world have the
same direction, although they vary greatly between
different populations and ethnic groups [7, 8, 10, 11].
The main feature of these dynamics is a reduction in
the intensity of selection and its component related to
differential mortality and fertility.
Low values of the Crow’s index and its components
in the population of Southern Russia indicate high
adaptability to the conditions of residence and, as a
consequence, the low contribution of natural selection
in the genetic and demographic structure of modern
populations . Under harsh climate conditions, the
components of selection have different intensities.
Thus, in the indigenous population of the Samburg
tundra, the component of differential mortality
exceeded the component of differential fertility of the
= 0.47 and
= 0.19 .
The data obtained for rural populations of India with
different ethnic compositions indicate the onset of a
demographic transition initiated by the improvement
of socioeconomic conditions and the health care sys
Like most modern cities, the populations of Ukrai
nian cities are multiethnic and multifaith. The ethnic
composition of the population of the Autonomous
Republic of Crimea is particularly variegated .
Currently, the intensive repatriation of Crimean Tatars
is taking place. This ethnic group differs in culture and
religion from the predominantly Slavic population of
modern Crimea. It is becoming increasingly numer
Reproduction Characteristics and Crow’s Index
in Different Groups of Yevpatoria Population
L. A. Atramentova
, I. P. Meshcheryakova
, and O. V. Filiptsova
Department of Genetics and Cytology, Karazin Kharkiv National University, Kharkiv, 61022 Ukraine
Department of Medical Biology, Kharkiv National Medical University, Kharkiv, 61022 Ukraine
Kharkiv National University of Pharmacy, Kharkiv, 61002 Ukraine
Received February 27, 2013
—According to the obstetric history of Yevpatoria residents of postreproductive age, the parameters
of the differential fertility as components of the natural selection (index Crow) in Slavic (Russian and Ukrai
nian) and nonSlavic individuals have been calculated. It is shown that, in the studied population, in one gen
eration, the index of total selection decreased from 0.3 to 0.32 by reducing the value
. For Slavic females,
the average number of pregnancies is 5.26, while the number of offspring is 1.75, and the index of total selec
tion equals 0.31. For nonSlavic women, these ratings were 4.84, 2.09, and 0.46. In nonSlavic women, nat
ural reproductive losses occur more frequently than in Slavic women, which may be associated with inbreed
ing, the level of which is usually higher in members of the Muslim faith. The average number of adverse preg
nancy outcomes in the nonSlavic families is 0.759, while for Slavic families, it is 0.503. Reproductive
problems were observed in 36.4% of Slavic families and 44.8% of nonSlavic families. The index of total
selection in nonSlavs (0.46) is 1.5 times higher than in Slavs (0.31). The difference is due to the selection
component, coupled with differential fertility (0.36 and 0.23, respectively). Interethnic differences in the rate
of natural increase can change the ethnic and denominational composition of the city, leading to an increase
in the Muslim component.