Parrot populations and habitat use in and around two lowland Atlantic forest reserves, Brazil

Abstract

We estimated population sizes of parrots in a large (Sooretama/Linhares) and a small (Porto Seguro) lowland Atlantic forest reserve, and examined their habitat associations within the reserves, and their use of forest fragments. In Sooretama, most species had estimated populations between 1000 and 20,000 individuals, but in the smaller reserve population densities were low and all but one species had population estimates <500. Two Amazons, including the`Endangered' Amazona rhodocorytha, were strongly linked to primary forests whereas the`Vulnerable' Pyrrhura cruentata was associated with non-pristine forest. There was considerable movement of parrots between the Sooretama reserve and the surrounding country with Amazona species tending to¯y into the reserve during the mornings, and the macaw Propyrrhura maracana¯ying out. Other species, notably P. cruentata and P. leucotis, were never recorded away from the reserve. Most parrot populations in the region are likely to be small, and the substantial populations around Sooretama make this reserve a parrot stronghold. It is crucial that ®re, illegal logging and parrot capture are adequately controlled within Sooretama, and there is a strong argument for extending conservation management eorts to areas immediately outside the reserve. #

Coincident scales of forest feedback on climate and conservation in a diversity hot spot

“…Estimates of population densities (individuals!km K2 ) for Atlantic forest primates, ungulates and passerine and nonpasserine birds were taken from the literature (Guix et al 1999;Marsden et al 2000Marsden et al , 2001Cullen et al 2001;González-Solis et al 2001). All estimates were from surveys within the Atlantic forest region.…”

Quantificação e descrição dos principais comportamentos de papagaios-chauá (Amazona rhodocorytha, Salvadori, 1890) cativos

“…O maior número de animais foi registrado repousando na região posterior do viveiro, o que nos leva a inferir que nessa região estavam mais protegidos devido à presença de placas de metal sobre a tela. Marsden et al (2000) verificaram que o papagaio--chauá tem como característica habitar o dossel da mata primária de floresta atlântica e escolher como dormitórios árvores com copa densa. No Cereias, essa proteção oferecida pelas chapas de metal na região posterior pode eventualmente ter mimetizado a proteção naturalmente encontrada nas copas das árvores.…”

“…Atualmente, essa ordem possui mais espécies globalmente ameaçadas de extinção do que qualquer outro grupo de aves (Engebretson, 2006). O chauá (Amazona rhodocorytha) ocorre nas florestas do Brasil oriental, habitando a mata alta, tanto na Serra do Mar, como em regiões elevadas do interior (leste de Minas Gerais) e na baixada litorânea, ocorrendo originalmente de Alagoas ao Rio de Janeiro (Marsden, Whiffin, Sadgrove, & Guimarães Jr., 2000;Parker III & Fitzpatrick, 1996;Sick, 1997). Klemann Júnior, Scherer Neto, Monteiro, Ramos, e Almeida (2008) realizaram um estudo sobre a distribuição do chauá no Estado do Espírito Santo e demonstraram que os animais são mais frequentes em florestas altas com altitudes inferiores a 300 m. O estudo de Simão, Santos, & Pizo (1997) mostra que o chauá escolhe preferencialmente os estratos superiores das árvores, acima de 15 m de altura, para pousar e se alimentar, diferentemente de outros psitacídeos como a Pyrrhura leucotis e Pyrrhura cruentata, que escolhem os estratos inferiores.…”

Post-Fledging Habitat Selection by the Slender-billed Parakeet (Enicognathus leptorhynchus) in a Fragmented Agricultural Landscape of Southern Chile

“…The Slender-billed Parakeet, like other psittacids, is intelligent and adaptable, characteristics that likely promote its persistence in dynamic landscapes (MacNally and Horrocks 2000, Marsden et al 2000, Evans et al 2005, Nunes and Galetti 2007. These characteristics may facilitate the adaptation of foraging behavior to include most available resources within a given area.…”