MAPEAMENTO E CARACTERIZAÇÃO GEOMORFOLÓGICA: Ecorregião Raso da Catarina e Entorno NE da Bahia

Oliveira, None Joao Henrique Moura; Chaves, Joselisa Maria

doi:10.4215/rm2010.0920.0014

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…1). 40,45 Deep cavities are formed in cliffs by water erosion, and macaws and two other parrot species (blue‐crowned parakeet Thectocercus acuticaudatus and blue‐fronted Amazon Amazona aestiva ) use these cavities for nesting and roosting 40…”

Section: Methodsmentioning

confidence: 99%

“…1). 40,45 Deep cavities are formed in cliffs by water erosion, and macaws and two other parrot species (blue-crowned parakeet Thectocercus acuticaudatus and blue-fronted Amazon Amazona aestiva) use these cavities for nesting and roosting. 40 Most of the macaw nests are concentrated in the two protected areas of the Raso da Catarina: Toca Velha (Canudos Biological Station, a private area) and Raso da Catarina Ecological Station (ESEC Raso da Catarina, a governmental conservation unit).…”

Section: Study Areamentioning

confidence: 99%

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Experimental removal of invasive Africanized honey bees increased breeding population size of the endangered Lear's macaw

Pacífico

Efstathion²,

Filadelfo³

et al. 2020

Pest Management Science

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BACKGROUND: Invasive Africanized honey bees potentially compete with cavity-nesting birds in South America. However, the impacts of this competition and its conservation consequences to threatened species are poorly known. We quantified the presence of these bees and assessed their competition for cliff cavities used by nesting Lear's macaws Anodorhynchus leari, a globally endangered parrot endemic to the Caatinga biome of Brazil. We treated beehives with permethrin by shooting them with a crossbow bolt that distributed the compound upon impact. When feasible, we removed the comb and applied an insecticide (fipronil) to deter bee recolonization. We subsequently surveyed the macaw breeding population to verify whether our treatment allowed for nest recruitment in cavities previously occupied by bees. RESULTS: We recorded > 100 beehives in the nesting cliffs. Hives outnumbered macaw nests tenfold in two areas recently recolonized by macaws. Cavities occupied by bees were significantly higher than those occupied by macaws, suggesting that macaws may be forced to breed in lower cavities. None of the untreated cavities (n = 50) were occupied by nesting macaws, whereas 15% of treated cavities (n = 52) were occupied within 2 years post treatment. Treated cavities occupied by macaws were significantly higher than those not occupied. Hive management increased macaw breeding population by 71% of the macaw breeding population increase. CONCLUSION: Experimental hive treatments were effective in restoring nesting resources lost due to bee infestation. An intensive and continued eradication program is recommended to enhance macaw habitat restoration, facilitating its expansion into historical areas.

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Section: Methodsmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Experimental removal of invasive Africanized honey bees increased breeding population size of the endangered Lear's macaw

Pacífico

Efstathion²,

Filadelfo³

et al. 2020

Pest Management Science

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“…Surveys were conducted at the two breeding sites known for the species: Raso da Catarina Ecological Station (RCES; 09°52’S, 38°38’W), and Canudos Biological Station (CBS; 09°57’ S, 38°59’W), known as Serra Branca and Toca Velha, respectively. Both are composed of sedimentary rock, characterised by the alternation of calcareous sandstone outcrops and delimited by intermittent streams (Oliveira and Chaves 2010). The areas are inserted in the Caatinga biome in the ecoregion of Raso da Catarina, where elevation reaches 800 m and temperature varies between 15 and 45°C.…”

Section: Methodsmentioning

confidence: 99%

Breeding to non-breeding population ratio and breeding performance of the globally Endangered Lear’s MacawAnodorhynchus leari: conservation and monitoring implications

Pacífico

Barbosa

Filadelfo

et al. 2014

Bird Conservation International

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SummaryLear’s Macaw Anodorhynchus leari is currently listed as “Endangered” by IUCN. Although it only breeds on cliffs at two protected sites in Bahia State, Brazil, there is no accurate information on population parameters such as the number of breeding pairs and their breeding performance. Between 2009 and 2010, we sought to quantify, for the first time, breeding population size and the main breeding parameters for the species in the two known breeding sites, by quantifying the number of active nests and monitoring 75 breeding attempts. Overall, 80% of the breeding attempts were successful with 1.33 (± 0.86 SD) fledglings/breeding attempt (productivity) and 1.67 (± 0.60 SD) fledglings/successful nest (brood size). Breeding success and productivity were higher in 2010, while brood size did not vary between years and breeding sites. By adding 73 estimated nests to the 41 nests monitored, 228 individuals were estimated to be reproductively active in 2010, representing c.20% of the population (1,125 individuals). Given that the species is confined to a single population, further population increases could provoke overcrowding and negative density-dependent effects if it does not expand geographically. Therefore, long-term population monitoring focusing on the fraction of the population that is actually breeding and its breeding performance, rather than solely on the whole population size, is important for a better understanding of the population dynamics and conservation of this species.

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DNA damage as indicator of the environmental vulnerability of bats in Brazil’s Caatinga drylands

Adam

Pessoa

Lima

et al. 2022

Environ Monit Assess

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MAPEAMENTO E CARACTERIZAÇÃO GEOMORFOLÓGICA: Ecorregião Raso da Catarina e Entorno NE da Bahia

Cited by 4 publications

References 3 publications

Experimental removal of invasive Africanized honey bees increased breeding population size of the endangered Lear's macaw

Experimental removal of invasive Africanized honey bees increased breeding population size of the endangered Lear's macaw

Breeding to non-breeding population ratio and breeding performance of the globally Endangered Lear’s MacawAnodorhynchus leari: conservation and monitoring implications

DNA damage as indicator of the environmental vulnerability of bats in Brazil’s Caatinga drylands

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