Reintroduction of songbirds from captivity: the case of the Great-billed Seed-finch (Sporophila maximiliani) in Brazil

Machado, Ricardo B.; Silveira, Luís Fábio; Silva, Maria Izabel Soares Gomes da; Ubaid, Flávio Kulaif; Medolago, Cesar A. B.; Francisco, Mercival R.; Dianese, J. C.

doi:10.1007/s10531-019-01830-8

Cited by 9 publications

(10 citation statements)

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“…However, a lack of basic biological knowledge prevents proper evaluation of the degree of threat for most Cerrado species. About 40-55% of the Cerrado has already been converted to croplands, pastures, and planted forests (Machado et al 2004;Mantovani and Pereira 1998;Sano et al 2010). Nevertheless, conversion of the Cerrado into Brazil's largest farm has received much less attention than deforestation of Amazonian and Atlantic Forests (Marris 2005;Ratter et al 1997).…”

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confidence: 99%

“…Besides, climate models that incorporate changes in land use and degradation of Cerrado habitats indicate that significant changes may occur in water and carbon cycles, with profound impacts on regional climate and downstream ecosystem services dependent on water (Hoffmann 2002;Hoffmann and Jackson 2000). Therefore, many studies forecast daunting scenarios for the biome (Machado et al 2004;Rambaldi and Oliveira 2003;Santos and Câmara 2002;Strassburg et al 2017). As home to many endemic species and at the same time highly threatened by agricultural expansion, the Cerrado is regarded as a global biodiversity hotspot (Mittermeier et al 2000;Myers 2003;Myers et al 2000).…”

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Biodiversity and conservation of the Cerrado: recent advances and old challenges

2020

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Background Covering about 2 Mio. km 2 by the arrival of the first European settlers, the Cerrado savannas are second in extent only to Amazonian forests amongst the South American biomes (Diniz et al. 2010; Eiten 1972; Oliveira and Marquis 2002). The Cerrado sits strategically at the centre of the continent, connecting two open vegetation biomes-the Chaco to the southwest and the Caatinga to the northeast-thus forming a diagonal corridor of dry habitats in South America, and simultaneously establishing a biogeographical barrier between two forest biomes-Amazonia to the northwest and the Atlantic Forest to the southeast (Schmidt and Inger 1951; Vanzolini 1963; Werneck 2011). Moreover, it also occurs as isolated patches within other biomes, presumably relicts of a more extensive past distribution (

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Biodiversity and conservation of the Cerrado: recent advances and old challenges

2020

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“…In small populations or breeding programs where a small number of individuals are used to produce the next generation, genetic variation is mainly lost because of sampling or genetic drift. The loss of genetic diversity in captive and endangered populations should be viewed with concern as it may limit the success of reintroduction projects such as that proposed for Great-billed Seed-Finches by [ 7 ]. The goal of many reintroduction programs is to provide sufficient genetic diversity to allow the population to cope with natural selection.…”

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confidence: 99%

“…Probably due to the small number of free individuals, records of trafficking of Great-billed Seed-finches today have been relatively rare [ 3 – 6 ]. In contrast, there are over 180,000 Great-billed Seed-finches legally raised in captivity in Brazil [ 4 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, until today, almost nothing is known about the population structure and genetic diversity of Great-billed Seed-finches captives. Knowledge and monitoring of parameters related to inbreeding, structure, and genetic diversity of the population is important for the conservation of captive Great-billed Seed-finches and the viability of reintroduction projects such as that proposed by [ 7 ].…”

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Quantitative genetic analyses provide parameters for selection and conservation of captive Great-billed Seed-finches (Sporophila maximiliani)

Júnior¹

2020

PLoS ONE

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The Great-billed Seed-finch ( Sporophila maximiliani ) is an endangered South American bird that has suffered from trafficking and the destruction of its natural habitat. In contrast, there are over 180,000 Great-billed Seed-finches legally raised in captivity in Brazil. The interest as a pet for Great-billed Seed-finches is due to their exceptional ability to sing. In the present research, the unknown genetic structure of the Great-billed Seed-finch captive population was investigated by quantitative analysis of 6,226 pedigree records. Additionally, 7,671 phenotypic records were available to estimate genetic parameters such as heritability and evolvability of a song-related trait of these birds for competitions. The captive Great-billed Seed-Finch population faces many of the problems commonly encountered in domestic animal populations such as a high level of inbreeding (average of 8.26%, 70.47% of birds were inbred), pedigree bottlenecks, unbalanced contribution of breeding animals and structuring (equivalent number of subpopulations of 2.91). Despite this, most genetic diversity remains preserved within aviaries. The high generation interval (5.74 years) found for this population should help to prevent a rapid increase in inbreeding and genetic drift. These results should serve as strong motivation and support for urgent actions to manage the genetic diversity of captive Great-billed Seed-Finches. From the viewpoint of genetic improvement for singing time in tournaments (STT), this trait presents sufficient variability to allow response to artificial selection given the heritability of 18.7% and evolvability of 2,447%. In contrast, inbreeding and high generation interval appear to be the most considerable barriers that may limit the genetic gain for STT. Widespread adoption of techniques such as optimal genetic contribution selection and implementation of routine genetic diversity monitoring via pedigree analysis and molecular tools can be crucial both in terms of breeding and conservation of genetic diversity of captive Great-billed Seed-Finches.

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New set of microsatellite markers for the Great-billed Seed-finch (Sporophila maximiliani – Passeriformes: Thraupidae): tools for inspection and conservation

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Reintroduction of songbirds from captivity: the case of the Great-billed Seed-finch (Sporophila maximiliani) in Brazil

Cited by 9 publications

References 47 publications

Biodiversity and conservation of the Cerrado: recent advances and old challenges

Biodiversity and conservation of the Cerrado: recent advances and old challenges

Quantitative genetic analyses provide parameters for selection and conservation of captive Great-billed Seed-finches (Sporophila maximiliani)

New set of microsatellite markers for the Great-billed Seed-finch (Sporophila maximiliani – Passeriformes: Thraupidae): tools for inspection and conservation

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