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PubMed1987

[Don Daeng village in northeast Thailand: population (2). An estimate of migration by mortality and fertility rates].

"The population dynamics of Don Daeng, a rice-growing village in Northeast Thailand, was studied as part of an integrated village study program in 1981-1984. The mortality and fertility rates since the 1930s were determined from data obtained by interviewing 232 ever-married women who gave birth to 876 children, while those for the preceding periods were estimated from the village population in three separate years and by extrapolation of the trend since the 1930s, which was adjusted for the results of the national censuses....[Results indicate that] immigration dominated until the early 1940s, when paddy acreage could no longer be expanded, and since then emigration has taken place." (SUMMARY IN ENG)

Agriculture↗
PubMed1990

Immigrants from the European socialist countries in the U.S.A. and Canada: socio-demographical aspects.

The author analyzes changes in the rate of migration and choice of destination among migrants from socialist countries in eastern and southern Europe to the United States and Canada during the period 1941-1990. "The data presented show that in the period in question the immigrants from the European socialist countries constituted only 2.9% of the total number of immigrants to the U.S.A. while their proportion in the total number of immigrants to Canada was 6.6%.... In comparison with the decades 1961-70 and 1971-80, in the middle of the 80's the proportion of immigrants from the examined countries in the U.S.A. and Canada increased.... The proportion of Poles among the emigrants from the East European countries in the U.S.A. and Canada is comparatively the highest...." (SUMMARY IN SCR)

Americas↗
PubMed1999

The effects of density dependence and immigration on local adaptation and niche evolution in a black-hole sink environment.

We examine the effects of density dependence and immigration on local adaptation in a "black-hole sink" habitat, i.e., a habitat in which isolated populations of a species would tend to extinction but where a population is demographically maintained by recurrent one-way migration from a separate source habitat in which the species persists. Using a diploid, one-locus model of a discrete-generation sink population maintained by immigration from a fixed source population, we show that a locally favored allele will spread when rare in the sink if the absolute fitness (or, in some cases, the geometric-mean absolute fitness) of heterozygotes with the favored allele is above one in the sink habitat. With density dependence, the criterion for spread can depend on the rate of immigration, because immigration affects local densities and, hence, absolute fitness. Given the successful establishment of a locally favored allele, it will be maintained by a migration-selection balance and the resulting polymorphic population will be sustained deterministically with either stable or unstable dynamics. The densities of stable polymorphic populations tend to exceed densities that would be maintained in the absence of the favored allele. With strong density regulation, spread of the favored allele may destabilize population dynamics. Our analyses show that polymorphic populations which form subsequent to the establishment of favorable alleles have the capacity to persist deterministically without immigration. Finally, we examined the probabilistic rate at which new favored alleles arise and become established in a sink population. Our results suggest that favored alleles are established most readily at intermediate levels of immigration.

Animals↗
PubMed1990

Hwabyung: the construction of a Korean popular illness among Korean elderly immigrant women in the United States.

The cultural construction of Hwabyung, a Korean culture-bound syndrome, is explored among a sample of 20 elderly Korean immigrant women in the United States. Hwabyung results when distressed emotions associated with the specifically Korean way of perceiving and reacting to intolerable and tragic life situations cause bodily symptoms by interfering with the harmony of "Ki" (vital energy). Korean elderly immigrants report a broad range of symptoms associated with Hwabyung; they less frequently report the epigastric mass, which had been considered the cardinal symptom by cosmopolitan and traditional medical writers. Hwabyung is treated holistically with psychosocial support from family, spiritual comfort, home and popular remedies, traditional Korean medicine, and biomedical treatments. Hwabyung provides a way of conceptualizing and resolving emotional distress through somatization among Korean elderly immigrant women.

Aged↗
PubMed1997

Immigration as a source of political discontent and frustration in Western democracies.

"This article describes the migration context of three sets of Western democracies and then explores plausible linkages between the scale, timing, and characteristics of migration, and the substance and process of migration policies, on the one hand, and support for government, on the other. Trying to move beyond plausibility, I discuss indirect indicators of the impact of immigration on Western publics: attitudes toward immigration policy and immigrants, support for extremist parties, and acts of violence and disorder linked to anti-immigrant or racist motives."

Attitude↗