| Literature DB >> 9204700 |
Abstract
This study evaluates the impact of the Trivers-Willard (T-W) effect on human populations, using demographic data collected from vital registration data in Venezuela. The evaluation of the sex ratio at birth (SRB) and of fetal and infant deaths supports the existence of T-W effect in the Venezuelan population in extreme conditions. This T-W effect was observable in the SRB but not at later ages and is related to the marital status of the mother. The results indicate that the investment in females associated with environmental adversity is greater than the investment in males associated with good environmental conditions.Entities:
Keywords: Age Factors; Americas; Birth Records; Child Survival; Death Records; Demographic Factors; Developing Countries; Economic Factors; Gender Issues; Infant; Latin America; Length Of Life; Mortality; Population; Population Characteristics; Population Dynamics; Population Statistics; Research Methodology; Research Report; Sex Distribution; Sex Factors; Sex Ratio; Social Class; Socioeconomic Factors; Socioeconomic Status; South America; Survivorship; Venezuela; Vital Statistics; Youth
Mesh：
Year: 1996 PMID： 9204700 DOI： 10.1080/19485565.1996.9988927
Source DB: PubMed Journal: Soc Biol ISSN： 0037-766X