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ALLOCHTHONOUS AND AUTOCHTHONOUS COMPONENTS FROM GIZZARD GRIT OF THERISTICUS MELANOPIS IN ANTHROPOGENIC PASTURES OF SOUTHERN CHILE

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dc.creatorMIGUEL SEGUNDO YÁÑEZ ALVARADO
dc.date2013
dc.date.accessioned2025-01-10T14:30:47Z
dc.date.available2025-01-10T14:30:47Z
dc.date.issued2013
dc.description.abstractNUMEROUS VERTEBRATES, AND IN PARTICULAR BIRDS, INGEST STONES (GEO-GASTROLITES) TO FAVOUR THE BREAKDOWN AND DIGESTION OF FOOD IN THE MUSCULAR STOMACHS. BETWEEN 1993 AND 1994 WE EVALUATED THE QUANTITY, RELATIVE ABUNDANCE AND QUALITY OF AUTOCHTHONOUS (GEO-GASTROLITES) AND ALLOCHTHONOUS (PIECES OF GLASS) COMPONENTS OF THE GRIT IN GIZZARDS OF BLACK-FACED IBIS (THERISTICUS MELANOPIS) INHABITING THE PASTURES OF SOUTHERN CHILE. GRIT ELEMENTS WERE PRESENT IN 32 OUT OF 48 (66,7%) OF ALL GIZZARD ANALYSED. A TOTAL OF 572 PARTICLES WERE RECORDED FROM WHICH, 69.1% CORRESPONDED TO AUTOCHTHONOUS ELEMENTS AND 27.8% WERE ALLOCHTHONOUS PARTICLES. BOTH COMPONENTS ARE SIMILAR IN SHAPE; HOWEVER GLASS CONTRIBUTES CONSIDERABLY MORE IN TERMS OF MASS. GENDER DIFFERENCES REVEAL THAT FEMALES CONSUME A SIGNIFI CANTLY GREATER NUMBER OF ALLOCHTHONOUS ELEMENTS THAN MALES. WE POSTULATE THE HYPOTHESIS THAT, DUE TO THEIR HIGH ENERGY REQUIREMENTS, FEMALES INGEST MORE PIECES OF GLASS TO FACILITATE THE BREAKDOWN AND DIGESTION OF FOOD WITH A LIMITED NUTRITIONAL VALUE, THUS INCREASING THEIR REPRODUCTIVE SUCCESS.
dc.formatapplication/pdf
dc.identifier.doi10.4067/S0717-65382013000100003
dc.identifier.issn0717-6538
dc.identifier.issn0717-6538
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/7757
dc.languagespa
dc.publisherGAYANA
dc.relation.uri10.4067/S0717-65382013000100003
dc.rightsPUBLICADA
dc.subjectSOUTH CHILE
dc.subjectPASTURES
dc.subjectGLASSES
dc.subjectGASTROLITES
dc.subjectBLACK-FACED IBIS
dc.subjectVIDRIOS
dc.subjectSUR DE CHILE
dc.subjectPRADERAS AGRÍCOLAS
dc.subjectGASTROLITOS
dc.subjectBANDURRIA
dc.titleALLOCHTHONOUS AND AUTOCHTHONOUS COMPONENTS FROM GIZZARD GRIT OF THERISTICUS MELANOPIS IN ANTHROPOGENIC PASTURES OF SOUTHERN CHILE
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE ESTADISTICA
ubb.SedeCONCEPCIÓN
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