A new species of gray seedeater (Emberizidae:<i>Sporophila</i>) from upland grasslands of southern Brazil

Repenning, Márcio; Fontana, Carla Suertegaray

doi:10.1525/auk.2013.12167

Cited by 18 publications

(20 citation statements)

References 13 publications

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“…Other, smaller passerines of the same family have shorter incubation periods, of 11 or 12 days, such as Sicalis citrina, Sporophila melanogaster, S. beltoni (treated as S. aff. plumbea by Repenning 2012 and later described by Repenning and Fontana 2013), and S. hypoxantha (Gressler and Marini 2011, Rovedder 2011, Repenning 2012, Franz and Fontana 2013. The observed hatching rate (94%) is high compared to a sympatric grassland bird in the study area such as S. melanogaster (55%, Rovedder 2011), or to the Tyrannidae Tyranus savana in the Brazilian cerrado (60%, Marini et al 2009b), but is similar to other neotropical passerines such as Elaenia chiriquensis (96%, de Medeiros and Marini 2007), E. cristata (95%, Marini et al 2009a) and S. beltoni (82%, Repenning 2012).…”

Section: Discussionmentioning

confidence: 96%

Breeding biology of the Lesser Grass-Finch (Emberizoides ypiranganus) in southern Brazilian upland grasslands

Chiarani¹,

Fontana²

2015

The Wilson Journal of Ornithology

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Section: Discussionmentioning

confidence: 96%

Breeding biology of the Lesser Grass-Finch (Emberizoides ypiranganus) in southern Brazilian upland grasslands

Chiarani¹,

Fontana²

2015

The Wilson Journal of Ornithology

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“…The mass of nestlings increased progressively until day 7, with the rate of increase seeming to slow from day 8 to 11 when feather growth of coverts and remiges occurs ( Figure 3F). The nestlings weighed~9 g at fledging, markedly lighter than their parents at~12 g (Repenning and Fontana 2013). A mean of 1.57 nestlings …”

Section: Parental Carementioning

confidence: 96%

“…The sex of nestlings was obtained through a PCR DNA analysis (Unigen Laboratory of DNA and genetics, São Paulo, Brazil). We conducted a daily census of juvenal birds in formative plumage (Repenning and Fontana 2013) and computed all distinctive individuals assumed in each of 3 study areas per week.…”

Section: Study Sites and Data Collectionmentioning

confidence: 99%

“…It breeds in upland shrub-grasslands of southern Brazil (Atlantic Forest Biome) and migrates north to wintering grounds in the Cerrado Biome (Repenning and Fontana 2013). This songbird currently has a restricted and highly fragmented distribution and has experienced declines in its population and historical distribution because of habitat loss and pressure from bird trappers.…”

Section: Introductionmentioning

confidence: 99%

“…This songbird currently has a restricted and highly fragmented distribution and has experienced declines in its population and historical distribution because of habitat loss and pressure from bird trappers. The species can be classified as globally endangered under the IUCN Red List criteria (Repenning and Fontana 2013). Information about this seedeater's life history and breeding biology is lacking.…”

Section: Introductionmentioning

confidence: 99%

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Breeding biology of the Tropeiro Seedeater (Sporophila beltoni)

and¹,

Fontana

2016

The Auk

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The recently described Tropeiro Seedeater, Sporophila beltoni, is a rare long-distance austral migrant songbird that breeds in upland grasslands of southern Brazil. No aspect of its natural history has been studied previously. We studied the natural history of this seedeater in the grasslands of the Araucarian Plateau from 2007 until 2011, focusing on breeding biology and monitoring 133 nests. The breeding cycle lasts for 3.8 months, and the breeding season is correlated with photoperiod and phenology of the grasses; nesting peaks in November and December; the mean clutch size is 2 eggs (1-3); and only the females brood, for 12 days. The nestling period lasts 10 days, and both parents care for the nestlings, although with different roles. The daily estimated survival rate (DSR) of nests, as modeled by the MARK program, was 0.94 and varied temporally in the breeding season. The estimated reproductive success was 20%. The quadratic model best explained the changes in nest survival, coupled with concealment and nest height from the ground. Other factors tested, including year-to-year variation, age of the nest, and species of support plant, did not significantly affect nest survival. Predation was the main cause of nest failure (48%), followed by desertion of nests and trampling by cattle (37%). Multiple breeding attempts (maximum 3) occurred, averaging 1.75 (SE 6 0.17) nests per female in each breeding season. This information on breeding biology and nest survival will aid in management and conservation efforts in grasslands of southern Brazil.Biologia reprodutiva da patativa-tropeira (Sporophila beltoni) RESUMOA patativa-tropeira (Sporophila beltoni)é um raro songbird migrante austral de longa distância que reproduz nos campos de altitude do sul do Brasil. Nenhum aspecto de sua história natural foi estudado previamente. Nós estudamos sua história natural nos campos da região do Planalto das Araucárias (RS e SC) desde 2007 até 2011 enfocando sua biologia reprodutiva. Nós monitoramos 133 ninhos. O ciclo reprodutivo da espécie contempla 3.8 meses e a reprodução esta significativamente correlacionada com o fotoperiodo e a fenologia das gramíneas. O pico de ninhos ativosé em novembro e dezembro; o tamanho das posturas tem em média dois ovos (1-3) e apenas a fêmea incuba por pelo menos 12 dias. O período médio de ninhegosé de 10 dias e ambos os pais cuidam dos mesmos com certa diferença nas atribuições de cada um deles. Estimativa de sobrevivência diária dos ninhos modelada pelo programa MARK foi de 0,94 e variou temporalmente no ciclo reprodutivo. A estimativa de sucesso reprodutivo foi de 20%. O modelo quadrático foi o que melhor explicou as diferenças na sobrevivência dos ninhos. Predação foi a principal causa de insucesso de ninhos (48%), seguido pelo abandono de ninho e pisoteio pelo gado (37%). Múltiplas posturas (máximo três) foram documentadas, numa média de 1,75 (SE 6 0,17) ninhos/fêmea numa mesma estação reprodutiva. Essas informações sobre biologia reprodutiva e sobrevivência de ninho são subsídios para esfor...

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Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola)

Mason

Olvera-Vital

Lovette

et al. 2018

Ecology and Evolution

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Phenotypic and genetic variation are present in all species, but lineages differ in how variation is partitioned among populations. Examining phenotypic clustering and genetic structure within a phylogeographic framework can clarify which biological processes have contributed to extant biodiversity in a given lineage. Here, we investigate genetic and phenotypic variation among populations and subspecies within a Neotropical songbird complex, the White‐collared Seedeater (Sporophila torqueola) of Central America and Mexico. We combine measurements of morphology and plumage patterning with thousands of nuclear loci derived from ultraconserved elements (UCEs) and mitochondrial DNA to evaluate population differentiation. We find deep levels of molecular divergence between two S. torqueola lineages that are phenotypically diagnosable: One corresponds to S. t. torqueola along the Pacific coast of Mexico, and the other includes S. t. morelleti and S. t. sharpei from the Gulf Coast of Mexico and Central America. Surprisingly, these two lineages are strongly differentiated in both nuclear and mitochondrial markers, and each is more closely related to other Sporophila species than to one another. We infer low levels of gene flow between these two groups based on demographic models, suggesting multiple independent evolutionary lineages within S. torqueola have been obscured by coarse‐scale similarity in plumage patterning. These findings improve our understanding of the biogeographic history of this lineage, which includes multiple dispersal events out of South America and across the Isthmus of Tehuantepec into Mesoamerica. Finally, the phenotypic and genetic distinctiveness of the range‐restricted S. t. torqueola highlights the Pacific Coast of Mexico as an important region of endemism and conservation priority.

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A new species of gray seedeater (Emberizidae:Sporophila) from upland grasslands of southern Brazil

Cited by 18 publications

References 13 publications

Breeding biology of the Lesser Grass-Finch (Emberizoides ypiranganus) in southern Brazilian upland grasslands

Breeding biology of the Lesser Grass-Finch (Emberizoides ypiranganus) in southern Brazilian upland grasslands

Breeding biology of the Tropeiro Seedeater (Sporophila beltoni)

Hidden endemism, deep polyphyly, and repeated dispersal across the Isthmus of Tehuantepec: Diversification of the White‐collared Seedeater complex (Thraupidae: Sporophila torqueola)

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