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    PRE-MATING COMMUNICATION AND HYBRIDIZATION BETWEEN TWO MEADOW KATYDIDS, ORCHELIMUM NIGRIPES AND O. PULCHELLUM (ORTHOPTERA: TETTIGONIIDAE): MALE CALLING SONG AND ASYMMETRIC FEMALE PREFERENCE

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    Miller_ku_0099D_11222_DATA_1.pdf (1.245Mb)
    Issue Date
    2010-12-06
    Author
    Miller, Ginger
    Publisher
    University of Kansas
    Format
    115 pages
    Type
    Dissertation
    Degree Level
    Ph.D.
    Discipline
    Ecology & Evolutionary Biology
    Rights
    This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.
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    Abstract
    I investigated the role of male calling song and female preference on mate choice and pre-mating isolation in Orchelimum nigripes and O. pulchellum. In Chapter 1, I show that the calls of O. nigripes and O. pulchellum differ significantly in multiple temporal characteristics. Given that male signals are different, I next determined whether or not there was species discrimination by females in caged mating trials. In chapter 2, I show female O. nigripes mated preferentially with O. nigripes while O. pulchellum females mated with both O. nigripes and O. pulchellum males. To isolate the acoustic preference of females for male song from other signals and exchanges, I tested female song preference on a walking compensator (a "servosphere") with playback of male song. In chapter 3, I demonstrate that female preference in both species is more complex than a simple preference for increased call energy, and that females of both species will orient to male songs of either species. Katydids from within the hybrid zone were characterized in two ways, song (Chapter 1) and mitochondrial DNA (mtDNA, Chapter 2). Songs from hybrid populations collected within the zone differed in temporal patterning from songs of allopatric Orchelimum nigripes and O. pulchellum, and were less variable than songs of allopatrics. Individuals collected across the hybrid zone primarily carried O. pulchellum mtDNA. This is consistent with the hypothesis that the southeastern hybrid zone was formed by crosses between O. pulchellum females and O. nigripes males, and is also consistent with the results of the caged mating trials in Chapter 2.
    URI
    http://hdl.handle.net/1808/7621
    Collections
    • Dissertations [4473]
    • Ecology & Evolutionary Biology Dissertations and Theses [351]

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    785-864-8983
    KU Libraries
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    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
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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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