Comportamento reprodutivo de Sporophila lineola (Linnaeus) (Passeriformes, Emberizidae)

Marcondes-Machado, Luíz Octávio

doi:10.1590/s0101-81751997000300001

Cited by 8 publications

(2 citation statements)

References 3 publications

(3 reference statements)

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“…The increased participation of the male in caring for the nestlings may be a strategy to increase the recruitment of young by minimizing competition among nestlings for food and could also help reduce the physiological stress on the female (Ricklefs 2002). Almost all authors who investigated the reproductive biology of Sporophila mentioned some participation of males in service to nestlings or young (Skutch 1954, Gross 1952, Alderton 1961, Marcondes-Machado 1997, Francisco 2006, Oliveira et al 2010.…”

Section: Parental Carementioning

confidence: 99%

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: Parental Carementioning

confidence: 99%

Breeding biology of the Tropeiro Seedeater (Sporophila beltoni)

and¹,

Fontana

2016

The Auk

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“…Only the females build the nests and incubate the eggs, while both sexes feed the nestlings. 19,21,22 The typical clutch size is two or three eggs and individuals can make up to six attempts per season ( unpublished data ). The mean incubation period is of 12.7 days and average nestling period is of 11.2 days.…”

Section: Methodsmentioning

confidence: 99%

Male plumage colouration predicts female reproductive investment and nestling survival in a colour dimorphic tropical songbird

Ferreira

Cunha

Lopes

2023

Avian Biology Research

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In sexually colour dimorphic bird species, males can exhibit phenotypic variation, with males breeding in either dull female-like plumage or brightly coloured plumage. Two contradictory hypotheses predict that the male phenotype variation can influence the female investment in a given breeding attempt. Whereas females usually prefer males in bright coloured plumage, the “differential allocation hypothesis” predicts that females should invest more in their reproductive output when mating with them; while the “compensatory investment hypothesis” predicts that females should invest more when mating with non-preferred males. To test those predictions, we analysed reproductive data for two consecutive breeding seasons (2018–2019 and 2019–2020) of Lined Seedeaters Sporophila lineola. S. lineola is a socially monogamous songbird species in which males exhibit two breeding phenotypes, a black-and-white plumage being the most common, and a less common female-like brownish plumage. Our findings show that females mated with brownish males have a higher reproductive investment (i.e., egg volume) than those mated with black-and-white males. Despite the lower investment of females in egg volume, our results showed that black-and-white males have a higher nestling survival, producing more hatchings and fledglings per season than brownish males, which could suggest a higher fitness. Our findings indicate that investment allocation on the eggs and offspring survival rates can be attributed to the plumage colour of males.

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Natural history of the Lined SeedeaterSporophila lineola(Aves: Thraupidae) in southeastern Brazil

Ferreira

Lopes

2017

Journal of Natural History

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Comportamento reprodutivo de Sporophila lineola (Linnaeus) (Passeriformes, Emberizidae)

Cited by 8 publications

References 3 publications

Breeding biology of the Tropeiro Seedeater (Sporophila beltoni)

Breeding biology of the Tropeiro Seedeater (Sporophila beltoni)

Male plumage colouration predicts female reproductive investment and nestling survival in a colour dimorphic tropical songbird

Natural history of the Lined SeedeaterSporophila lineola(Aves: Thraupidae) in southeastern Brazil

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