Implicancias de las diferencias en el tamaño corporal entre colonias para el uso de medidas morfométricas como método de sexado en Spheniscus magellanicus

Patricia Alejandra Gandini; Esteban Frere; Tomás Mariano Holik

doi:10.56178/eh.v13i3.1067

Articles Published 01 September 1992 https://doi.org/10.56178/eh.v13i3.1067

Implications of Differences in Body Size Among Colonies for the Use of Morphometric Measures as a Method of Sex Determination in Spheniscus magellanicus

Spheniscus magellanicus Magellanic Penguin Sexing method Morphometric measurements

Patricia Alejandra Gandini Facultad de Ciencias Exactas y Naturales. Ciudad Universitaria. Pab: 11410. Piso Lab: 76. Cátedra de Ecología de Comunidades. Nuñez. (1428) Buenos Aires | Ecobios. Casilla de correo 3825 - (1000) Buenos Aires. Correspondencia: Esteban Frere. Alberdi 745.1636 Olivos. Buenos Aires

Esteban Frere Facultad de Ciencias Exactas y Naturales. Ciudad Universitaria. Pab: 11410. Piso Lab: 76. Cátedra de Ecología de Comunidades. Nuñez. (1428) Buenos Aires | Ecobios. Casilla de correo 3825 - (1000) Buenos Aires. Correspondencia: Esteban Frere. Alberdi 745.1636 Olivos. Buenos Aires

Tomás Mariano Holik Ecobios. Casilla de correo 3825 - (1000) Buenos Aires. Correspondencia: Esteban Frere. Alberdi 745.1636 Olivos. Buenos Aires

Abstract

Five morphometric measurements were recorded in banded breeding adults at the Cabo Vírgenes breeding colony. Females' sex was confirmed using vent dilatation during the laying periodo. We determined which variable was most useful to discriminate between sexes. using discriminant analysis. Means of morphometric variables were compared with those obtained by Scolaro (1983) for Punta Tombo. Birds were significatively smaller in Cabo Vírgenes than in Punta Tombo. Bill measurements were the best to discriminate between sexes for both colonies but with different thresholds.

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References

Ainlcy,D.G.y W.8.Emison.1972.Scxualsizedimor-phisminAdcliePcnguins.Ibis114:267-271.
Bocrsma,P.D.y EmilyM.Davies1987.SexingMono-morphicBirdsbyVcntMeasuroments.Auk104:780-783
Bost,AYP.Jouventin,1990.EvolutionaryEcologyofGentooPenguinsPygosce/ispapua.InPenguinBio-logypp.85-112.AcadcmicPress.
Boswall,J.yO.Maclvcr.1974.TheMagellanicPenguinSpheniscusmage//anicus.pp.271-305inThebiologyofpenguins(8.Stonehouse,Ed.).London,UniversityParkPress.
Conway,W.1965.ThepenguinmetropolisofPuntaTom-boAnim.Kingdom68:115-123.
Daciuk,J.1976.NotasfaunÍsticasybioecológicasdePenÚlsulaValdésy patagonia.XVestudiobi.oecológi-coinicialdelosesfeniscidosvisitantesy colonizadoresdePenÚlsulaValdésy costasaledañas(Prov.Chubut.Arg.).PhysisSecoC35:43-56.
Dixon,WJ.1975.BMDPBiomedicalComputerProgra-ms.LosAngeles.UniversityCaliforniaPress.
Scolaro,J.A.,M.A.Halle l.M.Ximenez.1983.Thema-gellanicpenguin.Spheniscusmage//anicus:Sexingadultsbydiscriminantanalysisofmorphometriccha-racters.Auk100:221-224.
Sladen,W.J.L.1978.Scxingpenguinsbyclocascope.internoZool.Ycarbook18:77-80.
Stonchousc,B.1971.'IbcSnarcsIslandsPenguinEudyp-tesrobustusIbis113:1-7.
Warharn,J.1972.AspcctsofthebiologyoftheErect-crestedPenguinsEudyp/esse/a/ai.Ardea60:145-184.
-.1975.Thecrestcdpenguins.Pp.189-269inThcbiologyofpenguins(8.Stonchouse,FA.).London,UnivcrsityParkPross

How to cite

Patricia Alejandra Gandini, Esteban Frere, Tomás Mariano Holik (1992). Implications of Differences in Body Size Among Colonies for the Use of Morphometric Measures as a Method of Sex Determination in Spheniscus magellanicus. El Hornero, Vol. 13 No. 3 (1992), 211-213. https://doi.org/10.56178/eh.v13i3.1067

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[1] Ainlcy,D.G.y W.8.Emison.1972.Scxualsizedimor-phisminAdcliePcnguins.Ibis114:267-271.

[2] Bocrsma,P.D.y EmilyM.Davies1987.SexingMono-morphicBirdsbyVcntMeasuroments.Auk104:780-783

[3] Bost,AYP.Jouventin,1990.EvolutionaryEcologyofGentooPenguinsPygosce/ispapua.InPenguinBio-logypp.85-112.AcadcmicPress.

[4] Boswall,J.yO.Maclvcr.1974.TheMagellanicPenguinSpheniscusmage//anicus.pp.271-305inThebiologyofpenguins(8.Stonehouse,Ed.).London,UniversityParkPress.

[5] Conway,W.1965.ThepenguinmetropolisofPuntaTom-boAnim.Kingdom68:115-123.

[6] Daciuk,J.1976.NotasfaunÍsticasybioecológicasdePenÚlsulaValdésy patagonia.XVestudiobi.oecológi-coinicialdelosesfeniscidosvisitantesy colonizadoresdePenÚlsulaValdésy costasaledañas(Prov.Chubut.Arg.).PhysisSecoC35:43-56.

[7] Dixon,WJ.1975.BMDPBiomedicalComputerProgra-ms.LosAngeles.UniversityCaliforniaPress.

[8] Scolaro,J.A.,M.A.Halle l.M.Ximenez.1983.Thema-gellanicpenguin.Spheniscusmage//anicus:Sexingadultsbydiscriminantanalysisofmorphometriccha-racters.Auk100:221-224.

[9] Sladen,W.J.L.1978.Scxingpenguinsbyclocascope.internoZool.Ycarbook18:77-80.

[10] Stonchousc,B.1971.'IbcSnarcsIslandsPenguinEudyp-tesrobustusIbis113:1-7.

[11] Warharn,J.1972.AspcctsofthebiologyoftheErect-crestedPenguinsEudyp/esse/a/ai.Ardea60:145-184.

[12] -.1975.Thecrestcdpenguins.Pp.189-269inThcbiologyofpenguins(8.Stonchouse,FA.).London,UnivcrsityParkPross