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Frequency of leucism in a colony of Anoura geoffroyi (Chiroptera: Phyllostomidae) roosting in a ferruginous cave in Brazil Biota Neotropica
Reis,Aline da Silva; Zampaulo,Robson de Almeida; Talamoni,Sônia Aparecida.
Abstract: We provide the first report of the frequency of leucism for a species of Neotropical bat. Leucism is an anomaly of the skin pigmentation of an animal that manifests itself as the total or partial loss of the natural color of the species, and can affect part of or the entire body. During a study involving capture and marking individuals of a population of A. geoffroyi residing in a cave in the Brazilian state of Minas Gerais, seven individuals with some degree of depigmentation were recorded out of 616 individuals marked, for a frequency of 1.1%. Since leucism is due to recessive gene expression, these findings may indicate that the population is isolated and possesses a high level of endogamy. Factors that may be responsible for this condition in...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Glossophaginae; Hypopigmentation; Bats; Iron Quadrangle.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000300502
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Host preference of the hemiparasite Struthanthus flexicaulis (Loranthaceae) in ironstone outcrop plant communities, southeast Brazil Acta Botanica
Mourão,Fabiana Alves; Pinheiro,Rafael Barros Pereira; Jacobi,Claudia Maria; Figueira,José Eugênio Côrtes.
Struthanthus flexicaulis is a hemiparasite abundant in ironstone outcrops in southeast Brazil. We evaluated its host preference among species of the plant community, taking into account the abundance and foliage cover of the hosts. The importance of each species in the community and the mortality caused by the parasite were assessed based on a quantitative survey in 10 strips measuring 1m x 50m. The 10,290 individuals belonged to 42 species. Only 15 had a relative abundance in the plant community greater than 1%, of which 12 showed vestiges of parasitism. More than 80% of deaths in the community were associated with parasitism. Non-infected individuals had significantly less mortality rates (7%) than those infected (83%) (²= 1102.4, df = 1, p < 0.001)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canga; Iron Quadrangle; Ironstone outcrop; Plant-plant interaction; Parasitism.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000100041
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Reference Values of Soil Quality for the Rio Doce Basin Rev. Bras. Ciênc. Solo
Guevara,Yang Zumbo Coronel; Souza,José João Lelis Leal de; Veloso,Gustavo Vieira; Veloso,Renato Welmer; Rocha,Pablo Azevedo; Abrahão,Walter Antônio Pereira; Fernandes Filho,Elpídio Inácio.
ABSTRACT: The great geological and soil variation in the state of Minas Gerais, Brazil, indicates the need for regional studies to understand the geochemical background of soils. The Rio Doce Basin became a priority area for geochemical background determination after the rupture of the tailings dam of Fundão in 2015. In this context, the objectives of this study were to propose Reference Values of Soil Quality in the Rio Doce Basin, to define variables that can predict metal(loid) concentrations in the soil, and to examine the correlation between metal(loid) concentrations determined by X-ray fluorescence and by the traditional method. One hundred and seven samples were collected from minimally disturbed areas, representing the main soils and source...
Tipo: Info:eu-repo/semantics/article Palavras-chave: RDC; Iron Quadrangle; Heavy metals; Soil quality reference values; Mariana.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100515
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