Breeding Biology of the Tawny-Bellied Seedeater (<i>Sporophila hypoxantha</i>) In Southern Brazilian Upland Grasslands

Franz, Ismael; Fontana, Carla Suertegaray

doi:10.1676/12-059.1

Cited by 25 publications

(15 citation statements)

References 31 publications

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“…The breeding season is consistent with those observed for other sympatric finches, such as residents Zonotrichia capensis, Ammodramus humeralis, and Emberizoides ypiranganus and migrants Sporophila caerulescens, S. hypoxantha, S. melanogaster, and Cyanoloxia glaucocaerulea (Rovedder and Fontana 2012, Franz and Fontana 2013, Chiarani and Fontana 2015MR personal observation). This finding further highlights the strong influence of the local climate combined with the availability of seeds on the reproduction of granivorous birds in Southern South America.…”

Section: Discussionsupporting

confidence: 83%

“…The male participates increasingly in the care of the nestlings as they grow, similar to the pattern described for 4 other species of Sporophila (Facchinetti et al 2008, Franz and Fontana 2013, Fontana and Repenning 2014. In S. beltoni, unlike other species of Sporophila studied, males may feed the newly hatched nestlings, although the behavior of individual males varied.…”

Section: Parental Caresupporting

confidence: 70%

“…The survival probability of S. beltoni nests did not change during the nest cycle, an opposite pattern to those usually found for altricial open-nest-building species from different taxonomic groups, habitats, and regions, including Africa (Muchai and Plessis 2005), North America Martin 2005, Kerns et al 2010), and the Neotropics (Mermoz and Reboreda 1998, Gressler 2008, Santos 2008, França and Marini 2009, Di Giacomo et al 2011, Rovedder 2011, Franz and Fontana 2013. These studies found a higher probability of survival of nests during the incubation than during the nestling phase.…”

Section: Breeding Success and Nest Survivalmentioning

confidence: 81%

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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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Section: Discussionsupporting

confidence: 83%

Section: Parental Caresupporting

confidence: 70%

Section: Breeding Success and Nest Survivalmentioning

confidence: 81%

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Breeding biology of the Tropeiro Seedeater (Sporophila beltoni)

and¹,

Fontana

2016

The Auk

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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: 98%

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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“…Several techniques have been developed and successfully used to mark individuals or groups of individuals for later identification (Silvy et al, 2012). Such markings have been used for example to estimate population size (Haines & Modde, 1996;Moore et al, 2010), growth (Linnane et al, 2012), survival (Monk et al, 2011) and recruitment rates (Pearson & Munro, 1991), to monitor populations for conservation management (Dutton et al, 2005;Biggins et al, 2006) and to identify individuals for natural history studies (Franz & Fontana, 2013). However, using artificial marks has limitations that may affect the results or even preclude studies on some species.…”

Section: Introductionmentioning

confidence: 99%

Photo-identification as a technique for recognition of individual fish: a test with the freshwater armored catfish Rineloricaria aequalicuspis Reis & Cardoso, 2001 (Siluriformes: Loricariidae)

2016

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Photo-identification allows individual recognition of animal species based on natural marks, being an alternative to other more stressful artificial tagging/marking techniques. An increasing number of studies with different animal groups has shown that photo-identification can successfully be used in several situations, but its feasibility to study freshwater fishes is yet to be explored. We demonstrate the potential use of photo-identification for intraspecific recognition of individuals in the streamdwelling loricariid Rineloricaria aequalicuspis. We tested photo-identification in laboratory and field conditions based on the interindividual variability in abdominal bony plates. Our test yielded high correct matches in both laboratory (100%) and field conditions (> 97%), comparable to other reliable techniques and to studies that successfully used photo-identification in other animals. In field conditions, the number of correct matches did not differ statistically between computer-assisted and nakedeye identification. However, the average time expended to conclude computer-assisted photo evaluations was about half of the time expended to conclude naked-eye evaluations. This result may be exacerbated when using database with large number of images. Our results indicate that photo-identification can be a feasible alternative technique to study freshwater fish species, allowing for a wider use of mark-recapture in ecological and behavioral studies.A foto-identificação permite o reconhecimento individual de espécies de animais baseando-se em marcas naturais, sendo uma alternativa a outras técnicas de marcação artificial mais estressantes comumente usadas. O número crescente de estudos que usam foto-identificação em diferentes grupos animais mostra que esta técnica pode ser utilizada com sucesso, mas a viabilidade em estudos com peixes de água doce ainda não foi avaliada. Nós demonstramos o uso potencial da foto-identificação para o reconhecimento individual de peixes com indivíduos do loricarídeo Rineloricaria aequalicuspis. Nós testamos fotoidentificação em condições de laboratório e de campo com base na variabilidade inter-individual das placas ósseas abdominais. O teste resultou em elevada porcentagem de acerto nas comparações, tanto para a condição de laboratório (100%) quanto para a de campo (> 97%), o que é comparável com outras técnicas confiáveis e com outros estudos que empregaram fotoidentificação com sucesso. No teste de campo, o número de acertos não diferiu estatisticamente entre auxílio de computador e olho nu. Entretanto, o tempo médio despendido para concluir as avaliações com o auxílio de computador foi cerca da metade do tempo despendido para as avaliações a olho nu. Esse resultado pode ser exacerbado em avaliações com um grande número de imagens. Nossos resultados indicam que a foto-identificação pode ser uma técnica alternativa viável para estudar peixes de água doce e possibilita um uso mais amplo da marcação e recaptura para estudos ecológicos e comportamentais.

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Breeding Biology of the Tawny-Bellied Seedeater (Sporophila hypoxantha) In Southern Brazilian Upland Grasslands

Cited by 25 publications

References 31 publications

Breeding biology of the Tropeiro Seedeater (Sporophila beltoni)

Breeding biology of the Tropeiro Seedeater (Sporophila beltoni)

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

Photo-identification as a technique for recognition of individual fish: a test with the freshwater armored catfish Rineloricaria aequalicuspis Reis & Cardoso, 2001 (Siluriformes: Loricariidae)

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