Demorgaphy of the Tribal Groups of Rajasthan: 4. Selection Intensity

Bhasin, M.K.; Nag, Shampa

doi:10.1080/09720073.2007.11890984

Cited by 4 publications

(2 citation statements)

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“…In the Ladakh region too there were inter-population differences. The fertility component was reported to be higher among Bodhs and Arghuns than the mortality component, while the reverse has been observed among Balits and Brokpas (Bhasin & Nag, 2002), in whom the mortality component was higher. These contrarian results indicate that factors other than altitudinal differences may be responsible for the differential contributions of fertility and mortality components to the total selection index.…”

Section: Discussionmentioning

confidence: 93%

“…To study geospatial differences in selection intensities among different Himalayan populations (ranging from western Himalayas to eastern Himalayas), secondary data on about 59 populations (see Sarkar 1997;Bhasin & Nag 2002;Gautam et al, 2009;Kapoor et al, 2011;Sarma, 2013) were further analysed to study the within-state and between-states trends in live births and selections intensities. Within-and between-population differences were studied using analysis of variance (ANOVA).…”

Section: Comparison Of Selection Intensities With Other Himalayan Popmentioning

confidence: 99%

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Geospatial Assessment Based on Fertility and Mortality Differential Indices of Natural Selection in North-West and Eastern Himalayan Populations

Sharma

2016

J. Biosoc. Sci.

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There is contradictory evidence of having fewer live births and higher embryonic mortality among high-altitude populations than their counterparts at lower altitude. This study explores the geospatial differences in selection intensities among human populations living in different ecological settings. Reproductive data from post-menopausal women were collected from 75 women from near Shimla, Himachal Pradesh, at an altitude of 2150 m above sea level and 100 women from Jind, Haryana, at an altitude of 227 m. Secondary data were taken from 85 women from the Kinnaur district of Himachal Pradesh at an average altitude of 3420 m. A comparison of the study data was made with similar data from different populations living in the western and eastern Himalayas. The total selection intensity index based on Johnston and Kensinger's index was highest in Shimla and lowest in Kinnaur. The fertility selection component was highest in Shimla and lowest in Kinnaur. The prenatal mortality contribution to the total selection was highest in Shimla (30.76%) and lowest in Kinnaur (2.14%), while the contributions of normalized postnatal mortality were 16.39% and 57.80% in Shimla and Kinnaur, respectively. The fertility component of selection was higher than the mortality component in Shimla, while in the other two places the reverse was observed. Hypoxic conditions at high altitude seem to have little effect on the fertility and embryonic mortality rates of indigenous people. The geospatial differences in the selection intensities may be due to differences in ethnic, behavioural ecology, environmental, cultural and socioeconomic factors.

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Section: Discussionmentioning

confidence: 93%

Section: Comparison Of Selection Intensities With Other Himalayan Popmentioning

confidence: 99%

Geospatial Assessment Based on Fertility and Mortality Differential Indices of Natural Selection in North-West and Eastern Himalayan Populations

Sharma

2016

J. Biosoc. Sci.

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Opportunity for Natural Selection Among the Indian Population: Secular Trend, Covariates and Implications

Gautam

2009

J. Biosoc. Sci.

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Crow's index is widely used for indirect quantitative estimation of natural selection using birth and death rates. The present investigation is based on 179 studies among 144 different endogamous communities belonging to nineteen states and six geographical regions of India, categorized into six social groups. These studies appeared in 33 different years over six decades (1956 to 2007). The secular trend in Crow's index (I(t)) and its mortality and fertility components (I(m) and I(f)) shows a gradual decline in I(t) and radical shift in the relative contributions of I(m) and I(f). Before 1990 the opportunity for natural selection was mainly determined by differential pre-reproductive mortality (I(m)), whereas after 1990 it has been determined by differential fertility (I(f)). To find out the covariates of I(t), I(m) and I(f) sixteen socio-demographic variables were considered, and nine were found to be significantly correlated with I(t): total dependency ratio, decadal growth rate 1991-2001, young age dependency ratio, crude death rate, total fertility rate, child mortality rate, under-5 mortality rate, old age dependency ratio and decadal growth rate 1981-1991. On the basis of multivariate stepwise regression analysis, female literacy emerged as one of the most important predictors of I(t). The declining trend of I(t), Im and I(f) shows that the Indian population is passing through the demographic transition.

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Natural Selection Intensity among Kapu Caste Population of Coastal Andhra Pradesh, India

Raju¹,

Prakash²

2009

The Anthropologist

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Demorgaphy of the Tribal Groups of Rajasthan: 4. Selection Intensity

Cited by 4 publications

References 14 publications

Geospatial Assessment Based on Fertility and Mortality Differential Indices of Natural Selection in North-West and Eastern Himalayan Populations

Geospatial Assessment Based on Fertility and Mortality Differential Indices of Natural Selection in North-West and Eastern Himalayan Populations

Opportunity for Natural Selection Among the Indian Population: Secular Trend, Covariates and Implications

Natural Selection Intensity among Kapu Caste Population of Coastal Andhra Pradesh, India

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