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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Aspects of social organization in anuran choruses

Bishop, Phillip John 05 August 2016 (has links)
Thesis submitted to th~ Faculty of Scien9,~1 University of the Witwate:esrandJ JOham1esburg I' - 0 in fuJ,filmep:c of the reqtt!,'lernents for the degree .of DoCtor of .Philo~ ~phy JOHANNESBURG C/ o (~J July 1994 / species of anurens , By utilizing acoustio playbaok " "." :1.. (1 ',' .., experiments the exact' rlature it! call timing' in, five species was determined.' ~t)'U): specie~, each exl1ibi ted one "of three" distinot:: types Qf chozus organizatioh, while in one sp~ci.es it. was not possible to demonstrQ.te any chorus organization. The distinct: t.ype Qf ("chorus organizatidh that a species • c;. -" < . " ,', '. ~hib:l t;s . was shown to be a function of '"call duration and 0 behavioural refractory period. Go' . c' .~ The Significance of oall intensity in male~male '.\. interactions and female mate choice was determined in fU:t;"ther acoust,i21 ~layback experiments. ':Males"exhibited a. g.t,-,d",ed·type of'" r.esponSe, with the perc~ntage of ,.'aggresSive ;:, . caitn~,\~pc:r:easi'1l9with increasing intensity?f the playback. 11 Althou~tf females wer~ unable to compute absoltl,te intensity / ' they We,'~.1{:;l pr~fer~ntiall.Y attracted to thE! louder of two calls in simple" two-choice sitl,:lations, but their q,isc;riJninatory ability was impaired" in more complex situations ..Males of H. marmoratus. were ;found to call at ;f:~~~ c; coflsi:stentl.y different tepetit~on rates and :females l) preferE:mtiall,y selected :faster r~tes in simple two.;ochoice I;> experiments aSq~ell as in +,.1;ief;i.eld .. This study prqvides va~uable~' insigllt into t'~ " ' dynainios of several species, E.f;!.ab.l4J)'ij<' '8 understanding of the 'function· and signif Lcance ubiquitou~ phenomenon of chorus organi.zation.
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