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    Senescence in Organisms with Clonal Reproduction and Complex Life Histories

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    OriveM_AmNa_145(1)90.pdf (1.263Mb)
    Issue Date
    1995-01-01
    Author
    Orive, Maria E.
    Publisher
    University of Chicago Press
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    A population genetics model is developed predicting the fate of alleles affecting life-history attributes in organisms with complex life histories, including clonal reproduction and indeterminate growth. Such organisms are widespread and found in many ecologically important groups, including marine invertebrates such as corals and sponges, and most higher plant taxa. The evolution of senescence (here defined as a decrease in fitness components with age or stage) by the action of alleles having negatively pleiotropic stage effects is investigated in such organisms. The spread of these alleles depends on the sensitivity of the population growth rate, a measure of fitness, to changes in life-history parameters that for this model are the entries of the stage transition matrix. Examples from a published demographic study show that, for several cases examined, alleles increasing early survival or early reproduction at the cost of decreased late survival will not be favored. Clonal reproduction acts to retard the evolution of senescence, although by itself the existence of clonal reproduction in an organism does not preclude the evolution of senescence.
    URI
    http://hdl.handle.net/1808/16598
    DOI
    https://doi.org/10.1086/285729
    ISSN
    0003-0147
    Collections
    • Ecology & Evolutionary Biology Scholarly Works [1555]
    Citation
    Orive, Maria E. (1995). "Senescence in Organisms with Clonal Reproduction and Complex Life Histories." American Naturalist, 145(1):90-18. http://www.dx.doi.org/10.1086/285729

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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