Comportamento de forrageamento e dieta de Polystictus superciliaris (Aves, Tyrannidae) no sudeste do Brasil

Hoffmann, Diego; Vasconcelos, Marcelo Ferreira de; Lopes, Leonardo Esteves; Rodrigues, Marcos

doi:10.1590/s0073-47212007000300014

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…The species occurs from 900 to 1950 m and has a patchy distribution along the Espinhaço and Mantiqueira mountain ranges, where it inhabits rocky outcrops amidst a savanna-like habitat known as "campos rupestres", and highaltitude grasslands known as "campos de altitude" (VASCONCELOS et al 2003, HOFFMANN et al 2007. Within this restricted range, the Gray-backed Tachuri is considered uncommon in both habitats (BIRDLIFE 2004).…”

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confidence: 99%

Breeding biology and reproductive success of Polystictus superciliaris (Aves: Tyrannidae), an uncommon tyrant-flycatcher endemic to the highlands of eastern Brazil

Hoffmann¹,

Rodrigues²

2011

Zoologia (Curitiba, Impr.)

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ABSTRACT. Polystictus superciliaris (Wied, 1831) is a small tyrant-flycatcher endemic to mountaintops in the highlands of eastern Brazil. In this paper we present the first description of the breeding biology of P. superciliaris and estimate its unsuccessful nests, eight (66.7%) had eggs and four (33.3%) had nestlings when they failed. In nine (42.8%) of these cases, the nests were lost to predation, two to parasitism by botflies, and one due to abandonment. This study suggests that the reproductive success of P. superciliaris is intermediate compared to the other species of Tyrannidae that have been studied and closer to the lower limit of the 40%-80% range which is characteristic of tyrant -flycatcher species that breed in temperate regions.

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confidence: 99%

Breeding biology and reproductive success of Polystictus superciliaris (Aves: Tyrannidae), an uncommon tyrant-flycatcher endemic to the highlands of eastern Brazil

Hoffmann¹,

Rodrigues²

2011

Zoologia (Curitiba, Impr.)

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“…The species Polystictus superciliaris had the smallest proportion of its occupancy area in protected areas in 2019, but it was also one of the species that lost the least habitat among the analyzed AOOs. This species is not listed as endangered and occurs mainly in high-altitude rocky elds associated with the Espinhaço mountain range (Vasconcelos, 2003;Hoffmann et al, 2007). Unlike what happens in most of the Cerrado biome, agricultural activities are not the main drivers of soil change impacts in the region (Verdi at, al.…”

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Loss and Conservation of Nonforest Ecosystems: an Integrative Landscape and Climate Approach for Endemic Birds of the Cerrado

Silva

Marco

2023

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Habitat loss in nonforest ecosystems is neglected globally, including in the Cerrado biome, where agriculture and livestock have caused significant changes. In the Cerrado, birds are among the groups most vulnerable to this process. To provide a better overview of this group, we investigated the extent of the impacts and coverage of protected areas on the species' habitats. We selected 23 species and integrated landscape and climate approaches with geospatial data from protected areas in the Cerrado. Between 1985 and 2019, almost all species evaluated in this study lost habitat within the potential distribution. On average, the species kept only 66% of their area of occupation in 2019, which means a 34% loss. Species widely distributed in the Cerrado preserve more habitat in the northern part of the biome, while those with most of their habitats in the southernmost areas of the biome had strong habitat loss. The total area remaining in 2019 represents, on average, only 32% of the extension of occurrence. Of this 32% on average, only 23% of the areas are in protected areas of the Cerrado. Average habitat protection in 2019 was below expectations given the current coverage of protected areas in the biome, averaging only 7.3% of the EOO among species. Our results showed that low protection (1/4) and habitat loss in the Cerrado greatly impacted birds endemic to open habitats. With species in this ecosystem at high risk, it is urgent to deepen the discussion on protecting remaining and restoring already lost habitats.

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“…Individuals of P. superciliaris are small, weighing just 6 grams, and are endemic to mountaintops in the highlands of eastern Brazil. The species occurs from 900 to 1950 m and has a patchy distribution along the Espinhaço and Mantiqueira mountain ranges, where it inhabits rocky outcrops amidst a savanna-like habitat known as "campos rupestres", and highaltitude grasslands known as "campos de altitude" (VASCONCELOS et al 2003, HOFFMANN et al 2007. Within this restricted range, the Gray-backed Tachuri is considered uncommon in both habitats (BIRDLIFE 2004).…”

mentioning

confidence: 99%

Breeding biology and reproductive success of Polystictus superciliaris (Aves: Tyrannidae), an uncommon tyrant-flycatcher endemic to the highlands of eastern Brazil

Hoffmann¹,

Rodrigues²

2011

Zoologia (Curitiba, Impr.)

Self Cite

View full text Add to dashboard Cite

Polystictus superciliaris (Wied, 1831) is a small tyrant-flycatcher endemic to mountaintops in the highlands of eastern Brazil. In this paper we present the first description of the breeding biology of P. superciliaris and estimate its reproductive success from a population inhabiting rocky outcrops. This study was conducted during 2005 in the Parque Estadual da Serra do Rola Moça, municipality of Nova Lima (20°03'S, 44°00'W), state of Minas Gerais, southeastern Brazil. Fourteen pairs of P. superciliaris were banded and monitored. The onset of the breeding season in 2005 was assumed to have been sometime before the 26th of July, while it was assumed to have ended on the 23rd of November based on the last observation of a successful brood. Clutch size was invariably two eggs (N = 21), the incubation period averaged 17.7 ± 1.3 days (N = 9), and the nestling period averaged 16.4 ± 1.3 days (N = 8). We estimated the probability of reproductive success for P. superciliaris to be 41.3%, during this particular breeding season. Of the 12 (57.1%) unsuccessful nests, eight (66.7%) had eggs and four (33.3%) had nestlings when they failed. In nine (42.8%) of these cases, the nests were lost to predation, two to parasitism by botflies, and one due to abandonment. This study suggests that the reproductive success of P. superciliaris is intermediate compared to the other species of Tyrannidae that have been studied and closer to the lower limit of the 40%-80% range which is characteristic of tyrant _ flycatcher species that breed in temperate regions

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Comportamento de forrageamento e dieta de Polystictus superciliaris (Aves, Tyrannidae) no sudeste do Brasil

Cited by 7 publications

References 8 publications

Breeding biology and reproductive success of Polystictus superciliaris (Aves: Tyrannidae), an uncommon tyrant-flycatcher endemic to the highlands of eastern Brazil

Breeding biology and reproductive success of Polystictus superciliaris (Aves: Tyrannidae), an uncommon tyrant-flycatcher endemic to the highlands of eastern Brazil

Loss and Conservation of Nonforest Ecosystems: an Integrative Landscape and Climate Approach for Endemic Birds of the Cerrado

Breeding biology and reproductive success of Polystictus superciliaris (Aves: Tyrannidae), an uncommon tyrant-flycatcher endemic to the highlands of eastern Brazil

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