The Japanese quail is a precocial species, and because of its relatively rapid development, sexual maturation in about 40 days after hatching, and prolific breeding capacity, it promises to become an organism well suited for avian research. One stumbling block has been the inability to induce, with any consistency, parental behavior in laboratory stocks. The study reported herein demonstrates a method for establishing a self-perpetuating population under seminaturalistic conditions. In addition, given the limitions of finite space, chick mortality appears to have been mostly density dependent, thus indicating that the increase in the size of the population is circumscribed in part by population density.
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http://dx.doi.org/10.1037/h0088008 | DOI Listing |
Dev Psychol
January 2025
Social Work and Human Services, College of Arts, Society and Education, James Cook University.
Researchers have raised concerns about parental migration's effects on various aspects of the left-behind children's development. However, there is limited understanding of how parental migration influences children over the life course. This study aimed to fill this gap by investigating how exposure to parental migration during childhood shapes later development in Indonesia and the Philippines, two major labor-sending countries in Southeast Asia.
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January 2025
Institute for Health Research and Policy, University of Illinois.
Research has demonstrated that social-ecological risk and protective factors at multiple levels are associated with sexual behavior in adolescence. However, relatively little is known about how different patterns of these factors may work together in combination to influence sexual risk. In this study, we use nationally representative data from the U.
View Article and Find Full Text PDFInt J Lang Commun Disord
January 2025
Language Development Department, Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands.
Introduction: Children's early language and communication skills are efficiently measured using parent report, for example, communicative development inventories (CDIs). These have scalable potential to determine risk of later language delay, and associations between delay and risk factors such as prematurity and poverty. However, there may be measurement difficulties in parent reports, including anomalous directions of association between child age/socioeconomic status and reported language.
View Article and Find Full Text PDFSwiss Med Wkly
November 2024
Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland.
Background And Aims: Despite a well-funded healthcare system with universal insurance coverage, Switzerland has one of the highest neonatal and infant mortality rates among high-income countries. Identifying avoidable risk factors targeted by evidence-based policies is a public health priority. We describe neonatal and infant mortality in Switzerland from 2011 to 2018 and explore associations with neonatal- and pregnancy-related variables, parental sociodemographic information, regional factors and socioeconomic position (SEP) using data from a long-term nationwide cohort study.
View Article and Find Full Text PDFJ Hist Behav Sci
January 2025
UCL, London, UK.
From the second half of the nineteenth-century treatment of "imbecile" children in Britain underwent significant change. Examining the period from 1870 to 1920 when imbecility became a discrete category, and a matter of concern in policy and practice, this paper focuses on conceptualizations around fright, idleness, morality, and parental mental state as behavioral, emotional, and psychological causes and attributions of "imbecility" in children. I view this in light of the Victorian emotional culture of "care and control," which was driven by a shift in cost-cutting and fear of the impact of "imbecile children" on society, justifying exclusions, defining boundaries, and driving change.
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