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Previous issue date: 2013-05-24 / O estudo das aves configura uma importante ferramenta para o conhecimento dos
processos envolvidos de padr?es comportamentais e morfol?gicos. A esp?cie aqui
estudada pertence ? fam?lia Thamnophilidae, a terceira maior fam?lia restrita a regi?o
Neotropical. S?o conhecidos popularmente como papa-formigas e compreendem 209
esp?cies. Grande parcela das esp?cies apresenta comportamento cr?ptico, tornando a
comunica??o ac?stica importante ferramenta para manuten??o de contato das aves.
Herpsilochmus pectoralis Sclater 1857, possui dimorfismo sexual evidente, mede entre
10 e 12 cm, ? encontrada em fragmentos florestais do Nordeste e ? categorizada como
vulner?vel a processo de extin??o. Este estudo foi realizado em tr?s fragmentos de
restinga no litoral leste do estado do Rio Grande do Norte. Atrav?s de grava??es entre
2006 e 2012 foi poss?vel descrever e caracterizar o canto de H. pectoralis. O canto do
macho tem mais notas e maior dura??o do que o da f?mea (16% de dimorfismo). N?o
encontramos diferen?a na frequ?ncia dominante entre os sexos. Descrevemos quatro
tipos de chamadas para o repert?rio da esp?cie. Por meio de capturas com redes
ornitol?gicas entre 2009 e 2012 foi poss?vel descrever e comparar a morfologia de H.
pectoralis. A esp?cie apresentou menores valores de massa no per?odo de seca. Os
jovens apresentaram similaridades morfom?tricas com rela??o aos adultos. A esp?cie
n?o possui dimorfismo acentuado em suas caracter?sticas morfom?tricas. Os jovens que
voam possuem caracter?sticas morfom?tricas de adultos mesmo n?o apresentando
plumagem caracter?stica de adulto. O padr?o de muda na esp?cie ? caracter?stico de aves
tropicais, mas possui per?odo reprodutivo curto, caracter?stico de esp?cies temperadas.
A esp?cie mesmo estando em regi?o tropical sofre com o regime sazonal de chuvas, que
influencia em sua fenologia reprodutiva e no ciclo de muda (r?mige e retriz). Dessa
forma, a presente disserta??o traz informa??es sobre a biologia de H. pectoralis para
subsidiar o entendimento da rela??o dessa esp?cie com o ambiente e conhecer as
varia??es de aspectos morfol?gicos e vocais, visando entender padr?es e caracter?sticas
gerais dos Thamnophilidae. / The study of birds represents an important tool for the understanding of the processes
involved in behavioral and morphological patterns. The species we have studied
belongs to Thamnophilidae family, the third largest family restricted to the Neotropic
ecozone. They are popularly known as antbirds and comprise 209 species. A large
portion of the species has cryptic behavior, making the acoustic communication an
important tool for maintaining contact among birds. Herpsilochmus pectoralis Sclater
1857 has evident sexual dimorphism, measured between 10 and 12 cm height and it is
found in forest fragments in the Northeast and it is also categorized as vulnerable to
extinction process. This study was conducted in three sandbank fragments on the east
coast of the state of Rio Grande do Norte, Brazil. With the help of tape recordings
between 2006 and 2012 it was possible to describe and characterize the sing of H.
pectoralis. The sing from male birds has more and longer length than the female sing
(16% of dimorphism). No differences were found in the dominant frequency between
the sexes. We describe four types of calls from this species repertoire. Through
capturing with ornithological nets between 2009 and 2012 it was possible to describe
and compare the morphology of H. pectoralis. The species have shown lower corporal
mass in the dry season. The young birds showed morphometric similarities in
comparison to adults. The species has no accentuated dimorphism in their
morphometric characteristics. The young ones with flying capabilities have
morphometric characteristics of adults, even though they do not show a characteristic
adult plumage. The moult pattern in the species is a characteristic of tropical birds, but it
shows short reproductive period, typical of temperate species. Even being in the tropical
region, the species suffers with seasonal rainfall, which influences their reproductive
phenology and moult (remex and rectrix) cycle. Thus, this dissertation provides
information on the biology of H. pectoralis to support the understanding of the
relationship of this species to the environment and also to know the variations of
morphology and vocal aspects, in order to understand patterns and general
characteristics of Thamnophilidae.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20049 |
| Date | 24 May 2013 |
| Creators | Oliveira J?nior, Tonny Marques de |
| Contributors | 50373625987, http://lattes.cnpq.br/5696697654544552, Garda, Adrian Antonio, 80729568172, http://lattes.cnpq.br/2685356834735366, Ara?jo, Carlos Barros de, 50554271168, http://lattes.cnpq.br/5916372318047686, Fran?a, Leonardo Fernandes, Pichorim, Mauro |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM CI?NCIAS BIOL?GICAS, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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