Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females

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In some sexually dichromatic passerines, juvenile males retain a plumage similar to that of adult females through their first year or longer (delayed plumage maturation). The Tawny-bellied Seedeater (Sporophila hypoxantha) is a sexually dichromatic species in which, to the human eye, the juveniles l...

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Autores principales:	Mahler, Bettina, Reboreda, Juan Carlos
Publicado:	2011
Materias:	Avian visual modeling Plumage color Plumage reflectance Sporophila hypoxantha Tawnybellied Seedeater
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00105422_v113_n4_p907_Facchinetti http://hdl.handle.net/20.500.12110/paper_00105422_v113_n4_p907_Facchinetti
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00105422_v113_n4_p907_Facchinetti
record_format	dspace
spelling	paper:paper_00105422_v113_n4_p907_Facchinetti2023-06-08T14:34:35Z Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females Mahler, Bettina Reboreda, Juan Carlos Avian visual modeling Plumage color Plumage reflectance Sporophila hypoxantha Tawnybellied Seedeater In some sexually dichromatic passerines, juvenile males retain a plumage similar to that of adult females through their first year or longer (delayed plumage maturation). The Tawny-bellied Seedeater (Sporophila hypoxantha) is a sexually dichromatic species in which, to the human eye, the juveniles look like females. We analyzed the species' stages of plumage maturation by reflectance spectrometry and a visual model of color discrimination on captive individuals of known ages. We found that males retain a plumage different from that of adult males through their first breeding season. By the time males passed the age of 1 year, their color did not differ from that of adult males in any region of the body except the crown. Spectrophotometry also revealed differences between the plumage color of juvenile males and females, and the color-discrimination model implies that the birds should be able to detect these differences. Thus juvenile males of the Tawny-bellied Seedeater acquire adult plumage after their first breeding season but are already dichromatic during the first year. How this pattern of plumage development affects the species' reproductive or other social behavior deserves further study. © The Cooper Ornithological Society 2011. Fil:Mahler, B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Reboreda, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00105422_v113_n4_p907_Facchinetti http://hdl.handle.net/20.500.12110/paper_00105422_v113_n4_p907_Facchinetti
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Avian visual modeling Plumage color Plumage reflectance Sporophila hypoxantha Tawnybellied Seedeater
spellingShingle	Avian visual modeling Plumage color Plumage reflectance Sporophila hypoxantha Tawnybellied Seedeater Mahler, Bettina Reboreda, Juan Carlos Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females
topic_facet	Avian visual modeling Plumage color Plumage reflectance Sporophila hypoxantha Tawnybellied Seedeater
description	In some sexually dichromatic passerines, juvenile males retain a plumage similar to that of adult females through their first year or longer (delayed plumage maturation). The Tawny-bellied Seedeater (Sporophila hypoxantha) is a sexually dichromatic species in which, to the human eye, the juveniles look like females. We analyzed the species' stages of plumage maturation by reflectance spectrometry and a visual model of color discrimination on captive individuals of known ages. We found that males retain a plumage different from that of adult males through their first breeding season. By the time males passed the age of 1 year, their color did not differ from that of adult males in any region of the body except the crown. Spectrophotometry also revealed differences between the plumage color of juvenile males and females, and the color-discrimination model implies that the birds should be able to detect these differences. Thus juvenile males of the Tawny-bellied Seedeater acquire adult plumage after their first breeding season but are already dichromatic during the first year. How this pattern of plumage development affects the species' reproductive or other social behavior deserves further study. © The Cooper Ornithological Society 2011.
author	Mahler, Bettina Reboreda, Juan Carlos
author_facet	Mahler, Bettina Reboreda, Juan Carlos
author_sort	Mahler, Bettina
title	Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females
title_short	Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females
title_full	Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females
title_fullStr	Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females
title_full_unstemmed	Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females
title_sort	stages of plumage maturation of the tawny-bellied seedeater: evidence of delayed plumage maturation and cryptic differentiation between juveniles and females
publishDate	2011
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00105422_v113_n4_p907_Facchinetti http://hdl.handle.net/20.500.12110/paper_00105422_v113_n4_p907_Facchinetti
work_keys_str_mv	AT mahlerbettina stagesofplumagematurationofthetawnybelliedseedeaterevidenceofdelayedplumagematurationandcrypticdifferentiationbetweenjuvenilesandfemales AT reboredajuancarlos stagesofplumagematurationofthetawnybelliedseedeaterevidenceofdelayedplumagematurationandcrypticdifferentiationbetweenjuvenilesandfemales
_version_	1768543354630438912

Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females

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