|
|
|
|
|
| França,Leonardo F.; Sousa,Nadinni O. M.; Santos,Luane R. dos; Duca,Charles; Gressler,Daniel T.; Borges,Fábio J. A.; Lopes,Leonardo E.; Manica,Lilian T.; Paiva,Luciana V.; Medeiros,Rita C. S. de; Marini,Miguel Â.. |
| The identification of predators of birds' nests, crucial to a better understanding of predator-prey interactions, remains poorly known. Here we provide evidence that birds, and especially passerines, may depredate birds' nests in the Cerrado (Neotropical Savannah) of Central Brazil. Data was collected primarily in a Conservation Unit (Estação Ecológica de Águas Emendadas) during the breeding season, between 2003 and 2007. We report and discuss details on 14 events of nest predation, 12 of which by passerines, mostly by curl-crested jays - Cyanocorax cristatellus (Temminck, 1823). The results of our study suggest that the role of birds as nest predators in the Cerrado has been underestimated and needs to be further investigated. |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Cerrado; Bird; Passerine. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000400028 |
| |
|
|
| França,Letice C.; Marini,Miguel Â.. |
| The Cerrado is still one of the most important ecosystems in Brazil, even though more than 50% of its area has been altered or converted to pastureland and plantations. Despite its intense degradation, few ecological processes that might affect its biodiversity have been evaluated. The goal of this study was to test the edge effect on the predation rates at natural and artificial nests, at the Ecological Station of Águas Emendadas, Federal District, Brazil. Natural nests were found and monitored every three to four days from September to December of 2004 in the interior and at the edge of the reserve. Artificial nests were placed at four distances from the edge (0, 500, 1000 and 2000 m) in three spatial replicates in September and again in December of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brood parasitism; Nest predation; Plasticine eggs; Predators. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000200006 |
| |
|
|
| Duca,Charles; Guerra,Tadeu J.; Marini,Miguel Â.. |
| Territory size is an important ecological attribute of populations that has been considered a factor determines population density. Antbirds is a large group of mainly insectivorous Neotropical passerines, usually well represented in bird communities from forested landscapes in Neotropical region. Territory sizes for three Antbirds, Thamnophilus caerulescens (Vieillot, 1816) (Variable Antshrike), Dysithamnus mentalis (Temmink, 1823) (Plain Antvireo) e Pyriglena leucoptera (Vieillot, 1818) (White-shouldered Fire-eye), were mapped and their area estimated by the convex polygon method in a 50 ha forest fragment, in southeastern Brazil. The three species presented small territories of similar sizes (< 2 ha) both during the non-reproductive and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dysithamnus mentalis; Thamnophilidae; Pyriglena leucoptera; Territoriality; Thamnophilus caerulescens. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000300011 |
| |
|
|
| Duca,Charles; Marini,Miguel Â.. |
| For colonial bird species, egg hatching synchrony has been considered an important factor in their reproductive success. The Red-rumped Cacique, Cacicus haemorrhous (Linnaeus, 1766), is a Passeriformes species (Icterinae) that reproduces in colonies in which groups of females lay their eggs at different periods during the reproductive season. The objective of this study was to evaluate if there was a variation in the reproductive success among C. haemorrhous females groups that lay eggs in different periods along the reproductive season. A total of 192 nests from four colonies were monitored at Parque Estadual do Rio Doce, Minas Gerais state, Brazil, and used to calculate the nest survival probability in different periods (early and late) of the 2001... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Hatching synchrony. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000200026 |
| |
|
| |
|
|
|
