Demographic variation in timing and intensity of feather molt in migratory Fork-tailed Flycatchers (Tyrannus s. savana)

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dc.contributor.authorJahn, Alex E. [UNESP]
dc.contributor.authorGiraldo, Jose I.
dc.contributor.authorMacPherson, Maggie
dc.contributor.authorTuero, Diego T.
dc.contributor.authorHernan Sarasola, Jose
dc.contributor.authorCereghetti, Joaquin
dc.contributor.authorMasson, Diego A.
dc.contributor.authorMorales, Marvin V.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionAves Int Colombia
dc.contributor.institutionTulane Univ
dc.contributor.institutionUniv Buenos Aires
dc.contributor.institutionUniv Nacl La Pampa
dc.contributor.institutionUniv Nacl La Plata
dc.contributor.institutionUniv Florida
dc.date.accessioned2018-11-26T15:30:04Z
dc.date.available2018-11-26T15:30:04Z
dc.date.issued2016-06-01
dc.description.abstractUnderstanding the annual cycle of migratory birds is imperative for evaluating the evolution of life-history strategies and developing effective conservation strategies. Yet, we still know little about the annual cycle of migratory birds that breed at south-temperate latitudes of South America. We aged, sexed, and determined the progression and intensity of body, remige, and rectrix molt of migratory Fork-tailed Flycatchers (Tyrannus s. savana) at breeding sites in southern South America and at wintering sites in northern South America. Molt of both body and flight feathers occurred primarily during the winter. In early winter, a similar proportion of young and adult flycatchers molted remiges and rectrices, but remige molt intensity (number of remiges molting) was greater and primary molt progression (mean primary feather molting) more advanced in adults. In late winter, remige molt intensity and primary molt progression did not differ between age groups. We found no difference between males and females either in the proportion of individuals molting in winter or in the intensity or progress of remige molt. Our results suggest that the nominate subspecies of Fork-tailed Flycatcher undergoes one complete, annual molt on the wintering grounds, and represents the first comprehensive evaluation of molt timing of a migratory New World flycatcher that overwinters in the tropics. Given that breeding, molt, and migration represent three key events in the annual cycle of migratory birds, knowledge of the timing of these events is the first step toward understanding the possible tradeoffs migratory birds face throughout the year.en
dc.description.affiliationUniv Estadual Paulista, Dept Zool, Ave 24a,1515, Sao Paulo, Brazil
dc.description.affiliationAves Int Colombia, Carrera 4,5-80, Sopo, Cundinamarca, Colombia
dc.description.affiliationTulane Univ, Dept Ecol & Evolutionary Biol, Lindy Boggs Ctr 400, New Orleans, LA 70118 USA
dc.description.affiliationUniv Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ecol Genet & Evoluc, Inst IEGEBA,CONICET UBA, Buenos Aires, DF, Argentina
dc.description.affiliationUniv Nacl La Pampa, CECARA, CONICET, Santa Rosa, La Pampa, Argentina
dc.description.affiliationUniv Nacl La Pampa, Fac Ciencias Exactas & Nat, Ave Uruguay 151, La Pampa, Argentina
dc.description.affiliationUniv Nacl La Plata, Fac Ciencias Nat & Museo, B1904CCA,Ave 122 & 60, RA-1900 La Plata, Buenos Aires, Argentina
dc.description.affiliationUniv Florida, Dept Biol, 220 Bartram Hall, Gainesville, FL 32611 USA
dc.description.affiliationUnespUniv Estadual Paulista, Dept Zool, Ave 24a,1515, Sao Paulo, Brazil
dc.description.sponsorshipNational Geographic Society Scientific Research Grants
dc.description.sponsorshipGatorade Fund of the University of Florida
dc.description.sponsorshipIdea Wild
dc.description.sponsorshipOptics for the Tropics
dc.description.sponsorshipNational Science Foundation
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdNational Geographic Society Scientific Research Grants: 8444-08
dc.description.sponsorshipIdNational Geographic Society Scientific Research Grants: 8953-11
dc.description.sponsorshipIdNational Science Foundation: IRFP-0965213
dc.description.sponsorshipIdFAPESP: 2012/17225-2
dc.format.extent143-154
dc.identifierhttp://dx.doi.org/10.1111/jofo.12147
dc.identifier.citationJournal Of Field Ornithology. Hoboken: Wiley-blackwell, v. 87, n. 2, p. 143-154, 2016.
dc.identifier.doi10.1111/jofo.12147
dc.identifier.issn0273-8570
dc.identifier.urihttp://hdl.handle.net/11449/158941
dc.identifier.wosWOS:000378628900003
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofJournal Of Field Ornithology
dc.relation.ispartofsjr0,675
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectArgentina
dc.subjectColombia
dc.subjectfeather
dc.subjectllanos
dc.subjectrectrix
dc.subjectremige
dc.titleDemographic variation in timing and intensity of feather molt in migratory Fork-tailed Flycatchers (Tyrannus s. savana)en
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-Blackwell

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