Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Density-dependent migration and human population structure in historical Massachusetts.

J H Relethford

    American Journal of Physical Anthropology
    |March 1, 1986
    PubMed
    Summary

    Migration rates in historical Massachusetts populations are density-dependent, not linear. Small and large populations show high migration, while medium populations exhibit low gene flow.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Genetic evidence and the modern human origins debate.

    Heredity·2008
    Same author

    Global analysis of regional differences in craniometric diversity and population substructure.

    Human biology·2002
    Same author

    Absence of regional affinities of Neandertal DNA with living humans does not reject multiregional evolution.

    American journal of physical anthropology·2001
    Same author

    Ancient DNA and the origin of modern humans.

    Proceedings of the National Academy of Sciences of the United States of America·2001
    Same author

    Human skin color diversity is highest in sub-Saharan African populations.

    Human biology·2000
    Same author

    Spatial variation of anthropometric traits in Ireland.

    Human biology·1999

    Area of Science:

    • Population genetics
    • Historical demography
    • Human migration patterns

    Background:

    • Population structure studies often examine population size and migration's impact on genetic variation.
    • The relationship between population size and migration rates remains under-investigated.
    • This study explores density-dependent migration in historical Massachusetts populations.

    Observation:

    • Analyzed 4,859 marriage records from four north-central Massachusetts populations (1741-1849).
    • Data divided into 29 population and time cohorts, calculating exogamy and gene flow estimates (local, long-distance, effective migration).
    • Identified nonlinear density-dependent migration patterns unrelated to temporal trends.

    Findings:

    • Migration is highest in small (<800) and large (>1,600) populations, and lowest in medium-sized populations.
    Keywords:
    AmericasBiologyDemographic FactorsDemographyDeveloped CountriesDeveloping CountriesGeneticsGenetics, PopulationHistorical DemographyMassachusettsMigrationNorth AmericaNorthern AmericaPopulationPopulation DynamicsPopulation SizeSocial SciencesUnited States

    Related Experiment Videos

  • This curvilinear relationship is attributed to mate availability/land in small populations and economic pull in large populations.
  • Observed unusually low migration rates in three samples, reflecting settlement history.

    • Implications:

    • Density-dependent migration can influence genetic drift, either enhancing or counteracting its effects.
    • Understanding migration patterns is crucial for interpreting genetic variation within and between populations.
    • Findings provide insights into historical population dynamics and their genetic consequences.