2007
DOI: 10.1590/s0101-81752007000100027 View full text |Buy / Rent full text
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Abstract: O fura-barreira Hylocryptus rectirostris é uma ave endêmica das matas ciliares da região do Cerrado, considerada rara a incomum e prioritária para pesquisa. A ausência de dimorfismo sexual aparente é o padrão disseminado entre os Furnariidae, no entanto, para algumas espécies da família foram encontradas diferenças morfométricas entre os sexos, sugerindo pressões evolutivas e exigências ecológicas distintas entre machos e fêmeas. O objetivo deste trabalho foi verificar a existência de dimorfismo sexual de tama… Show more

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“…Our study shows that White-crested Elaenia males can be differentiated from females by body measurements, a common result obtained in passerines studies (e.g., Faria et al 2007, Cardoni et al 2009, Botero-Delgadillo 2010, Sandoval & Mennill 2013. Nevertheless, it would be important to assess other features that have been used to differentiate sexes and that can be measured during bird handling in banding stations, such as keel length.…”
Section: Discussionsupporting
“…Apenas recentemente, a espécie recebeu mais atenção, sendo demonstrada a existência de dimorfismo sexual morfométrico (FARIA et al 2007a), de forte territorialidade e de especificidade alimentar (FARIA et al 2007b). Através destes estudos, foi possível comprovar a estabilidade dos territórios ao longo de todo ano e sua íntima relação com as matas ciliares.…”
Section: Nariidae) Iidae) Iidae) Iidae) Iidae)unclassified
“…Com 12 dias de vida o ninhego apresenta o corpo coberto por penas, atingindo em média o peso de 32,5 ± 2,7 g (n = 6). Faltando um dia para deixar o ninho, o filhote pesa em média 46,0 ± 3,2 g (n = 3), já quase atingindo o peso de um adulto (média 48,5 ± 3,2 g, n = 38) (FARIA et al 2007a). Porém, a plumagem dos filhotes ao abandonar o ninho é bastante diferente dos pais.…”
Section: Descrição De Ovos E Filhotesunclassified
“…The males of this thrush have larger wings than the females, which could allow them to fly faster and arrive first at their breeding grounds (Silva et al 2011). In resident species, larger wing size has been recorded in male Chestnut-capped foliage-gleaner Clibanornis rectirostris (Wied, 1831) in the Serra do Cipó National Park, in the Brazilian Cerrado savanna (Faria et al 2007), and in the male Restinga Antwren in the coastal restinga (Chaves and Alves 2013). The males of both Figure 1.…”
Section: Discussionmentioning
“…Longer wings and tails help to increase flight efficiency, maneuverability, as well as balance and lift in conditions of high elevation (Landmann & Winding 1993, Altshuler & Dudley 2006, Maybury & Rayner 2001. Likewise, morphometric differences in wings between males from HE and females from both localities may be due to the territorial behavior of males of Z. capensis, similar to other species such as the dark-eyed junco (J. hyemalis) in western Canada and the henna-capped foliage-gleaner (Clibanornis rectirostris) in southeastern Brazil (Faria et al 2007, Bears et al 2008. Most likely, territorial behavior under windy conditions, such as those found in HE locality, could lead to more efforts in flight displacement to maintain and defend the territory.…”
Section: Discussionmentioning