Evaluación de la hipótesis de la detección alertada en el canto del Chingolo (Zonotrichia capensis). II. El efecto de la degradación acústica en los playbacks con cantos

German Simonetti; Pablo L. Tubaro; Enrique T. Segura

doi:10.56178/eh.v14i3.997

Articles Published 01 October 1996 https://doi.org/10.56178/eh.v14i3.997

Evaluation of the alerted detection hypothesis in the song of the Rufous-collared Sparrow. II. Effect of acoustic degradation in playbacks of complete and sectioned songs

alerted detection acoustic degradation Zonotrichia capensis playback song

German Simonetti Laboratorio de Biología del Comportamiento. Instituto de Biología y Medicina Experimental. Obligado 2490, (1428) Buenos Aires, Argentina

Pablo L. Tubaro Laboratorio de Biología del Comportamiento. Instituto de Biología y Medicina Experimental. Obligado 2490, (1428) Buenos Aires, Argentina

Enrique T. Segura Laboratorio de Biología del Comportamiento. Instituto de Biología y Medicina Experimental. Obligado 2490, (1428) Buenos Aires, Argentina

Abstract

The song of the Rufous-collared Sparrow (Zonotrichia capensis) has two parts: an introduction and a final portion referred to as "theme" and "trill", respectively. The Alerted Detection Hypothesis suggests that song structure is adaptive for long-range communication in a noisy environment. Besides, it proposes that the theme evolved as an alerting component which warns receivers about the imminence of the informative part of the signal: the trill. We tested this hypothesis with a playback design using complete songs, themes and trills, in both normal and acoustically degraded condition. The Rufous-collared Sparrows responded more to complete and normal stimuli than to the theme, trill, and degraded stimuli, respectively. In addition, there were no differences in the strength of response elicited by themes and trills. These results contrast with the predictions of the Alerted Detection Hypothesis, according to which, only complete normal or degraded songs as well as normal trills, would have evoked responses.

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References

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How to cite

German Simonetti, Pablo L. Tubaro, Enrique T. Segura (1996). Evaluation of the alerted detection hypothesis in the song of the Rufous-collared Sparrow. II. Effect of acoustic degradation in playbacks of complete and sectioned songs. El Hornero, Vol. 14 No. 3 (1996), 35-43. https://doi.org/10.56178/eh.v14i3.997

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[1] BECKER,P.1982.Thecodingofspecies-specificcharac-teristicsinbirdsounds.En:AcousticCommunica-tioninBirds.Kroodsma,Millery Ouel1etEds.Voll.213-252.AcademicPress.

[2] BROOKS,R.v J.FALLS.1975.Individualrecognitionbysonginwhite-throatedsparrows.n.Effectsoflocation.Can.J.Zool.53:1412-1420.

[3] DATE,E.M.,R.E.LEMON,D.M.WEARV,v A.K.RJCHTER.1991.Speciesidentitybybirdsong:Discreteoradditiveinformation?Anim.Behav.41:111-120.

[4] EGAN,J.P.,G.Z.GREENBERG,v A.I.SCHULMAN.1961a.Intervaloftimeuncertaintyinauditorydetection.J.Acoust.SocoAm.33:771-778.

[5] EGAN,J.P.,G.Z.GREENBERG,v A.I.SCHULMAN.1961b.Operatingcharacteristics,signaldetectability,andthemethodoffreeresponse.J. Acoust.SocoAm.33:993-1007.

[6] EGAN,J.P.,A.I.SCHULMAN,vG.Z.GREENBERG.1961a.Memoryforwaveformandtimeuncertaintyinauditorydetection.J.Acoust.SOCoAm.33:779-781.

[7] HANDFORD,P.1981.VegetationalcorrelatesofvariationinthesongofZonotrichiacapensis,innorthwestemArgentina.Behav.Eco\.&Sociobio\.8:203-206.

[8] HANDFORD,P.1988.Trillratedialectsintherufous-col-laredsparrow,Zonotrichiacapensis,innorthwest-emArgentina.Can.J.Zoo\.66:2658-2670.

[9] HANDFORD,P.vF.NOTTEBOHM.1976.Allozymicandmorphologicalvariationinpopulationsamplesofrufous-col1aredsparrow,Zonotrichiacapensis,inrelationtovocaldialects.Evolution30:802-817.

[10] HANDFORD,P.V S.LOUGHEED.1991.Variationinlengthandpitchcharactersinthesongoftherufous-col1aredsparrow,Zonotrichiacapensis,withrespecttohabitat,trilldialectsandbodysize.Condor93:644-658.KING,A.P.v M.J.WEST.1977.SpeciesidentificationintheNorthAmericanCowbird:Appropriateresponsestoabnormalsong.Science195:1002-1004.

[11] KROODSMA,D.E.1989.Suggestedexperimentaldesignsforsongplaybacks.Anim.Behav.37:600-609.

[12] LOUGHEED,S.C.,A.J.LOUGHEED,M.RAE,V P.HANDFORD.1989.AnalysisofadialectboundaryinChacovegetationintherufous-col1aredsparrow.Condor91:1002-1005.

[13] MORTON,E.S.1975.Ecologicalsourcesofselectionsonavianssounds.Am.Nat.109:17-34.

[14] MORTON,E.S.1986.PredidionsfromtheranriJ~hypothesisfortheevolutionoflcmgcIistuIE:c~inbirds.Behaviour99:64-86.

[15] NOTTEBOHM,F.1969.Thesongofthechingo,lo,.UJtKrtrichiacape1l.JÍ3,inArgentina:descriptionamievalu-ationofa systemofdialects.Condor71:299-315.

[16] NOTTEBOHM,F.1975.ContinentalpatternsofsongvariabilityinZonotrichiacapensis:somepossibleecologicalcorrelates.Am.Nat.109:605-624.

[17] NOTTEBOHM,F.yR.K.SELANDER.1972.VocaldialectsandgenefrequenciesintheChingolosparrow(Zono-trichiacapensis).Condor74:137-143.

[18] PATTERSON,T.y L.PETRINOVICH.1979.Fieldstudiesofhabituation:Il.Effectofmassedstimuluspresenta-tion.J.ofComp.Physiol.Psychol.93:351-359.

[19] RAISBECK,G.1963.InformationTheory.Cambridge,Mass.:MITPress.Richards,O.G.1981.Alertingandmessagecomponentsinsongofrufous-sidedtowhees.Behaviour76:223-249.

[20] RICHARDS,O.G.yR.H.WILEY.1980.Reverberationsandamplitudefluctuationsinthepropagationofsoundina forest:Implicationsforanimalcommunication.Am.Nat.115:381·399.

[21] SHIOVITZ,K.A.1975.Theprocessofspecies-specificsongrecognitionbytheindigobunting,Passerinacyanea,anditsrelationshiptotheorganizationofavianacousticalbehaviour.Behaviour55:128-179.

[22] SIEGEL,S.yN.CASTELLAN.1989.Nonparametricstatisticsforthebehavioralsciences.McGraw-Hill.

[23] SIMONETTI,G.1991.Aspectosfuncionalesdelaestruc-turadelcantodelchingolo(Zonotrichiacapensis).SeminariodeLicenciatura.FCEN.UniversidaddeBuenosAires.

[24] TUBARO,P.1990.AspectoscausalesyÍÍIIlciiDual'esc&losJllIiÚ-GIIt~ttd'dC8IIDllm'tid\ingolo(Zono-triclfi'lifcapensis).Tesisdoctoral.FCEN.Universi-daddeBuenosAires.

[25] TUBARO.P.L.,F.M.GABELLI.I.M.MioZETICH,yE.T.SEGURA.1996.EvaluacióndelaHipótesisdelaDetec-ciónAlertadaenlecantodelchingolo(Zonotrichiacapensis).I.Experimentosconplaybacksdecantoscompletosy fraccionados.Hornero14:27-34.

[26] TUBARO,P.L.yE.T.SEGURA.1994.OialectdifferencesinthesongofZonotrichiacapensisintheSouthernPampas:AtestoftheAcousticAdaptationHypoth-esis.Condor96:1084-1088.

[27] TUBARO,P.L,E.T.SEGURA,y P.HANDFORD.1993.Geo-graphicvariationinthesongoftheRufous-colIaredSparrowinEasternArgentina.Condor95:588-595.

[28] WEST,M.J.y A.P.KING.1980.Enrichingcowbirdsongbysocialdeprivation.J.Comp.Physiol.Psychol.94:263-270.

[29] WEST,M.J.,A.P.K1NG,y O.H.EASTZER.1981.Validatingthefemalebioassayofcowbirdsong:Relatingdifferencesinsongpotencytomatingsuccess.Anim.Behav.29:490-501.

[30] WILEY,R.y O.RICHARDS.1978.Physicalcontraintsonacousticcommunicationintheatmosphere:implica-tionsfortheevolutionofanimalvocalizations.Behav.Ecol.andSociobiol.3:69-94.

[31] WILEY,R.yO.RICHARDS.1982.AdaptationsforAcousticCommunicationinBirds:SoundTransmissionandSignalOetection.En:Acousticcommunicationinbirds.Kroodsma,MilleryOuelletEds.Vol1.AcademicPress.