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GENETIC DIFFERENTIATION OF LIFE HISTORY TRAITS IN POPULATIONS OF MESOCYCLOPS EDAX (CRUSTACEA: COPEPODA)

G. Wyngaard

Published 1986 in The Biological Bulletin

ABSTRACT

Differences in maturation time, body size and clutch size among populations of the freshwater copepod Mesocyclops edax inhabiting lakes of different seasonalities (Lake Thonotosassa, Florida, and Douglas Lake, Michigan) were maintained through two generations under common laboratory conditions. In most cases, Florida individuals matured more rapidly and had larger body sizes and clutch sizes than Michigan individuals over a range of temperature from 15 to 30° C. The greatly reduced fecundity and longer maturation time of the Michigan population relative to the Florida population at 15° C may reflect adaptations to different temperature regimes encountered by these geographically distant populations. Genotype-environment interactions were observed for body size, but not for maturation time or clutch size. Some local variation was evident in both the Michigan and Florida locales, indicating that forces operating on a local scale may result in substantial variation that is superimposed upon any broad scale, ...

PUBLICATION RECORD

  • Publication year

    1986

  • Venue

    The Biological Bulletin

  • Publication date

    1986-04-01

  • Fields of study

    Biology, Environmental Science

  • Identifiers
    DOI 10.2307/1541809
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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