Modeling problems in conservation genetics using captive Drosophila populations: Improvement of reproductive fitness due to immigration of one individual into small partially inbred populations

Derek Spielman, Richard Frankham*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    82 Citations (Scopus)

    Abstract

    Immigration into small isolated captive and wild populations is recommended to alleviate inbreeding depression. The effects on reproductive fitness of introducing one immigrant into 10 small partially inbred captive populations of D. melanogaster were evaluated. The relative reproductive fitness of the immigrant populations (0.628) was approximately double that of the isolated populations (0.294) and about halfway between the isolated populations and the outbred base population (1.00). Every replicate population increased in fitness following the introduction of an immigrant. The improvements in reproductive fitness shown by the immigrant populations were not due to F1 hybrid vigor, as the experimental populations underwent three generations of random mating prior to the fitness tests. These results indicate substantial benefits can be gained by the translocation of as few as a single animal between small, partially inbred populations. © 1992 Wiley‐Liss, Inc.

    Original languageEnglish
    Pages (from-to)343-351
    Number of pages9
    JournalZoo Biology
    Volume11
    Issue number5
    DOIs
    Publication statusPublished - 1992

    Keywords

    • inbreeding
    • translocation
    • wild populations

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