Population Development in Czechia in 2020

Demografie ◽  
2021 ◽  
Vol 63 (4) ◽  
pp. 246-261
Author(s):  
David Morávek ◽  
Jana Koukalová
Keyword(s):  
Population Development ◽  
Demographic Processes ◽  
Long Term Trends ◽  
And Migration ◽  
Almost All

The population development of Czechia in 2020 was significantly affected by the COVID-19 epidemic. Epidemiological measures or the pandemic itself were reflected in almost all monitored demographic processes, and in many cases long-term trends were interrupted. In addition, existing minimums or maximums were rewritten within the period of the last ten years. The article focuses on the main demographic processes, namely births, deaths, marriages, divorces and migration. The beginning of the examined period is the year 2011, in which the census took place, and then the following years, especially the period 2015–2020.

scholarly journals Population structure and spatial distribution of porbeagles (Lamna nasus) in Irish waters

2019 ◽  
Vol 76 (6) ◽  
pp. 1581-1590 ◽  
Author(s):  
Luke W J Cameron ◽  
William K Roche ◽  
Jonathan D R Houghton ◽  
Paul J Mensink
Keyword(s):  
Population Structure ◽  
Spatial Distribution ◽  
North Atlantic ◽  
Population Decline ◽  
The North ◽  
Aggregation Site ◽  
Show Evidence ◽  
Long Term Trends ◽  
Almost All

Abstract Porbeagles throughout the North Atlantic have experienced severe population decline through overfishing, with the northeastern population listed as critically endangered. Management of this population is constrained by the paucity of data on porbeagle population structure, distribution and behaviour in this region. Here we use a long-term (47 year) Irish capture-mark-recapture dataset to investigate the population structure, spatial distribution and seasonal movements of this species. From 1970–2017, a total of 268 sharks (9 recaptures) were ID tagged, with most individuals likely being juvenile based on length at maturity estimates (mean total length = 143.9 cm, SD = 35.4). Almost all captures were recorded at three distinct locations near angling hubs along the south, west and north coasts with catches peaking in August. Long-term trends in capture date indicated a shift towards earlier capture dates in the northern site (n = 153). Our findings suggest Irish waters may act as a persistent summer aggregation site for juveniles, which show evidence for seasonal site fidelity, returning to nearby locations between years. These findings demonstrate the utility of such programmes, which can be implemented, with minimal expense by engaging with the angling sector, to elucidate the population structure and distribution of wide-ranging fish species.

Comparison of three carbon determination methods on naturally occurring substrates and the implication for the quantification of 'soil carbon'

Soil Research ◽  
2011 ◽  
Vol 49 (1) ◽  
pp. 27 ◽  
Author(s):  
M. K. Conyers ◽  
G. J. Poile ◽  
A. A. Oates ◽  
D. Waters ◽  
K. Y. Chan
Keyword(s):  
Soil Carbon ◽  
Annual Variation ◽  
Organic Substrates ◽  
Test Procedures ◽  
Organic C ◽  
Soil C ◽  
Long Term Trends ◽  
Carbon Determination ◽  
Almost All

Accounting for carbon (C) in soil will require a degree of precision sufficient to permit an assessment of any trend through time. Soil can contain many chemically and physically diverse forms of organic and inorganic carbon, some of which might not meet certain definitions of ‘soil carbon’. In an attempt to assess how measurements of these diverse forms of C might vary with analytical method, we measured the C concentration of 26 substrates by three methods commonly used for soil C (Walkley–Black, Heanes, and Leco). The Heanes and Leco methods were essentially equivalent in their capture of organic C, but the Leco method captured almost all of the inorganic C (carbonates, graphite). The Heanes and Walkley–Black methods did not measure carbonates but did measure 92% and 9%, respectively, of the C in graphite. All three of the common soil test procedures measured some proportion of the charcoal and of the other burnt materials. The proportion of common organic substrates (not the carbonates, graphite, or soil) that was C by weight ranged from ~10% to 90% based on the Heanes and Leco data. The proportion of the organic fraction of those same substrates, as measured by loss-on-ignition, that was C by weight ranged from 42% to 100%. The relationship between Walkley–Black C and total C (by Heanes and Leco) showed that Walkley–Black C was a variable proportion of total C for the 26 substrates. Finally, the well-known, apparent artefact in the Cr-acid methods was investigated: dichromate digestion should contain at least 7–10 mg C in the sample or over-recovery of C might be reported. Our observation that common soil C procedures readily measure C in plant roots and shoots, and in burnt stubble, means that there will likely be intra-annual variation in soil C, because avoidance of these fresh residues is difficult. Such apparent intra-annual variation in soil C will make the detection of long-term trends problematic.

scholarly journals Evolutionary dynamics in structured populations under strong population genetic forces

2019 ◽  
Author(s):  
Alison F. Feder ◽  
Pleuni S. Pennings ◽  
Joachim Hermisson ◽  
Dmitri A. Petrov
Keyword(s):  
Population Differentiation ◽  
Evolutionary Dynamics ◽  
Structured Populations ◽  
Short Term ◽  
Migration Rates ◽  
Neutral Equilibrium ◽  
Demographic Processes ◽  
And Migration ◽  
Approximate Bayesian

AbstractHigh rates of migration between subpopulations result in little population differentiation in the long-term neutral equilibrium. However, in the short-term, even very abundant migration may not be enough for subpopulations to equilibrate immediately. In this study, we investigate dynamical patterns of short-term population differentiation in adapting populations via stochastic and analytical modeling through time. We characterize a regime in which selection and migration interact to create non-monotonic patterns of the population differentiation statistic FST when migration is weaker than selection, but stronger than drift. We demonstrate how these patterns can be leveraged to estimate high migration rates that would lead to panmixia in the long term equilibrium using an approximate Bayesian computation approach. We apply this approach to estimate fast migration in a rapidly adapting intra-host Simian-HIV population sampled from different anatomical locations. Notably, we find differences in estimated migration rates between different compartments, all above Nem = 1. This work demonstrates how studying demographic processes on the timescale of selective sweeps illuminates processes too fast to leave signatures on neutral timescales.

World Economy: Forecast for the Year 2050

2008 ◽  
pp. 62-79 ◽  
Author(s):  
V. Klinov
Keyword(s):  
International Relations ◽  
World Economy ◽  
Think Tanks ◽  
Geographic Structure ◽  
Catching Up ◽  
The World ◽  
Crucial Problem ◽  
Demographic Processes ◽  
Long Term Trends

Forecasting long-term trends in the world economy is a necessary element of elaborating a strategy of economic development. The forecast for 2025 and 2050 has been worked out using concepts of Kondratieff long waves, catching-up pathways of development as well as modern trends in demographic processes. The estimates of changes in the geographic structure of the world economy, so derived, are compared with forecasts based on extrapolation of trends in the last 30 years of the 20th century, made up by prominent think tanks. The formation of the multi-center structure of the world economy and probable emergence of Russia as one of the global powers may imply that worldwide cooperation in securing supply of natural resources and protecting the environment will become a crucial problem of international relations.

scholarly journals SES inequalities in cause-specific adult mortality: a study of the long-term trends using longitudinal individual data for Sweden (1813–2014)

2020 ◽  
Vol 35 (11) ◽  
pp. 1043-1056
Author(s):  
Enrico Debiasi ◽  
Martin Dribe
Keyword(s):  
Positive Association ◽  
Adult Mortality ◽  
Proportional Hazard ◽  
Individual Level ◽  
Fundamental Cause ◽  
Regional Population ◽  
Long Term Trends ◽  
And Migration ◽  
Circulatory Diseases

AbstractHigher socioeconomic status (SES) is associated with lower mortality, and this correlation has been confirmed using different indicators across several geographical settings. Nevertheless, the timing of the emergence of the SES gradient remains unclear. We used individual-level longitudinal data for a regional population in southern Sweden covering the period between 1813 and 2014, and we applied a cause-specific proportional hazard model. We estimated SES differences in all-cause, nonpreventable, preventable, and cause-specific adult mortality in four subperiods (1813–1921, 1922–1967, 1968–1989, 1990–2014) by gender adjusting for birth year, place of residence, marital status, and migration status. The SES gradient in mortality present today for both genders emerged only around 1970, and with few exceptions, it emerged at approximately the same time for all causes of death. It emerged earlier for women than for men, particularly in infectious diseases. In the nineteenth and early twentieth centuries, we found a positive association between SES and mortality from circulatory diseases for men. SES has not always been a fundamental cause of mortality; it only emerged as such in the second half of the twentieth century. We argue that habits and behaviors embedded in the different social strata played a major role in the emergence of the SES gradient.

scholarly journals The image of the elderly in German advertising: A systematic review

2015 ◽  
Author(s):  
Dennis Otrebski
Keyword(s):  
Scientific Practice ◽  
Explanatory Power ◽  
Quality Criteria ◽  
The Elderly ◽  
Structural Features ◽  
Original Research ◽  
Long Term Trends ◽  
Almost All ◽  
Key Aspects

Background: Despite the wealth of literature across disciplines on the image of the elderly in German advertising, no-one has successfully managed to pull the existing work together and review the entire literature in a way that gives full consideration to the quality, validity and explanatory power of the findings. This paper is a first step to assess and systemise key aspects of 31 original studies, which were published between 1975 and 2010, on the topic. Objectives: The objectives of the paper are threefold: Firstly, to identify existing original research on the image of the elderly in German advertising; secondly, to assess the quality of the existing works; and thirdly, to systemise key aspects regarding the topic. Method: A Systematic Literature Review (SLR) was utilised to synthesise the available research and offer a scholarly critique of literature. 11 quality criteria were derived from SLR literature and general guidelines for good scientific practice in order to evaluate the studies’ transparency – i.e., clarity about how, when, where, etc. the knowledge was generated. During this process, particular attention was paid to accommodate the high share of qualitative research within the field. Results: Despite the specificity of the topic at first glance, the research turned out to be very heterogeneous, with studies addressing a combination of different aspects in order to investigate the image of the elderly in German advertising. Nevertheless, similar structural features could be identified. The quality assessment indicated an overall mediocre transparency for the studies found, with particular deficits concerning sample justification, placing findings into existing context and implications for practice and/or research. Conclusions: Research on the topic has a long tradition in Germany, but lacks standardisation and sufficient transparency. Almost all studies worked to some extent in a vacuum – i.e., ignored each other. Moreover, the heterogeneity impedes the findings’ comparability and makes deductions of long term trends mostly impossible. Consequently, only a select number of research is suitable for future alignment, as their findings can be sufficiently assessed for reliability.

scholarly journals Main characteristics of demographic development of eastern Herzegovina in the second half of the 20th century and at the beginning of the 21st century

2014 ◽  
pp. 727-735
Author(s):  
Radoslav Corovic
Keyword(s):  
Spatial Distribution ◽  
Total Population ◽  
Census Data ◽  
Natural Increase ◽  
Population Ageing ◽  
Population Development ◽  
Demographic Development ◽  
Demographic Indicators ◽  
Demographic Processes ◽  
And Migration

At the beginning of the observed period, the population dynamics in Eastern Herzegovina was characterized by stagnation, followed by the decrease of the total population, primarily due to traditionally present emigration, but also due to negative natural population growth. Birth rates decreasing processes, population ageing, and some other predominantly negative demographic processes have been reported for decades. This area has a low population density, while spatial distribution of the population is characterized by concentration in settlements which have the function of a municipal centre. Contemporary demographic indicators (of natural increase of population and migration) indicate further decrease in population of this region, especially of its rural parts. This is also shown by the previous 2013 Census data. Keeping in mind the current demographic indicators and characteristics of the population, side by side with weak economic development of this region, it may be expected that negative trends in population development will continue.

scholarly journals Evolutionary Dynamics in Structured Populations Under Strong Population Genetic Forces

2019 ◽  
Vol 9 (10) ◽  
pp. 3395-3407 ◽  
Author(s):  
Alison F. Feder ◽  
Pleuni S. Pennings ◽  
Joachim Hermisson ◽  
Dmitri A. Petrov
Keyword(s):  
Population Differentiation ◽  
Evolutionary Dynamics ◽  
Structured Populations ◽  
Short Term ◽  
Migration Rates ◽  
Neutral Equilibrium ◽  
Demographic Processes ◽  
And Migration ◽  
Approximate Bayesian

In the long-term neutral equilibrium, high rates of migration between subpopulations result in little population differentiation. However, in the short-term, even very abundant migration may not be enough for subpopulations to equilibrate immediately. In this study, we investigate dynamical patterns of short-term population differentiation in adapting populations via stochastic and analytical modeling through time. We characterize a regime in which selection and migration interact to create non-monotonic patterns of population differentiation over time when migration is weaker than selection, but stronger than drift. We demonstrate how these patterns can be leveraged to estimate high migration rates using approximate Bayesian computation. We apply this approach to estimate fast migration in a rapidly adapting intra-host Simian-HIV population sampled from different anatomical locations. We find differences in estimated migration rates between different compartments, even though all are above Nem = 1. This work demonstrates how studying demographic processes on the timescale of selective sweeps illuminates processes too fast to leave signatures on neutral timescales.

Working at the Ichapur Gunpowder Factory in the 1790s (Part I)

2012 ◽  
Vol 39 (1) ◽  
pp. 19-56 ◽  
Author(s):  
Jan Lucassen
Keyword(s):  
Migrant Workers ◽  
Poor Performance ◽  
Pension Scheme ◽  
Industrial Workers ◽  
Remarkable Case ◽  
Migration History ◽  
History Of ◽  
Long Term Trends ◽  
And Migration

The Gunpowder Manufacture at Ichapur near Calcutta in the 1790s engaged in busy years 2,000–2,500 skilled labourers and therefore was one of the world’s largest factories. Besides, the wages and secondary benefits (including a pension scheme for victims of work accidents since 1783) of these migrant workers were comparatively reasonable and—more significantly—the result of several forms of collective action. This remarkable case study raises many questions regarding long-term trends in the labour history and migration history of India, where accepted wisdom stresses the emergence of mobility since the 1840s and poor performance of the industrial workers since the end of the nineteenth century.

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