Female Song Preferences Of Three Cryptic Katydids

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					Female Song Preferences
Of Three Cryptic Katydids


               Kevin Rice
     University of North Carolina-Asheville
            Department of Biology
           Family Tettigoniidae




• Stridulation
  – File and scraper
• Species-specific calls
  – Analyze calls to identify species
 Tettigoniidae Mating Systems
• Most Tettigoniidae         • Phaneropterine
  –   Male produces call       –   Male produces call
  –   Female moves to male     –   Female answers
  –   Male is stationary       –   Female is stationary
  –   Female is silent         –   Male moves to female
             Amblycorypha

•   Round-headed katydids
•   3 Cryptic Species

    Amblycorypha alexanderi     (Aa)
    Amblycorypha rotundifolia   (Ar)
    Amblycorypha ‘craggy’       (Ac)
(Aa)
(Ar)
(Ac)
                Hypotheses


• Females prefer own song morph

• Males only respond to answers from own females
Ac



Ar



Aa
           Materials & Methods


• Virgin females
• Placed in cages
• Around calling male
Ac



Ar



Aa
                                              1 .0


                                              0 .9                 Fem ale T ick Answ ers
P ro p o rtio n o f T ria ls A n s w e re d


                                                                    G = 238   P < 0.0001
                                              0 .8


                                              0 .7
                                                     Aa

                                              0 .6


                                              0 .5


                                              0 .4                                                   Ac

                                              0 .3
                                                                              Ar
                                              0 .2


                                              0 .1


                                              0 .0

                                                      A a so n g          A r so n g        A c so n g

                                                                        M a le S ong
                                                 1 .0

                                                                        M ale R esponse
P ro p o rtio n o f T ria ls R e s p o n d e d

                                                 0 .9
                                                                       G = 268   P < 0.0001
                                                 0 .8


                                                 0 .7


                                                 0 .6
                                                        Aa
                                                 0 .5


                                                 0 .4


                                                 0 .3
                                                                                 Ar
                                                 0 .2


                                                 0 .1                                                  Ac

                                                 0 .0
                                                         A a fem ale         A r fem ale      A c fem ale

                                                                            F e m a le
        Why Wrong Answers?

• Females
  – Last ditch effort
  – Nuptial gifts
        Why Wrong Answers?

• Females               • Males
  – Last ditch effort     – Competition
  – Nuptial gifts         – Not enough time
                          – Spooked by set up
     Acknowledgements

• Dr. Forrest     • Chris Day
• Casey Crowley   • Josh Day
• Cara Exten      • Ashley Brooks
                  • Ben Webster

				
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