Publications by authors named "Jose E Santos Junior"

Article Synopsis
  • The Brazilian merganser is a critically endangered bird species with fewer than 250 mature individuals left in the wild, primarily located in pristine freshwater habitats in Brazil.
  • Extensive genetic research shows low genetic diversity and high inbreeding due to recent population declines linked to habitat loss.
  • Urgent conservation efforts are needed, including careful genetic monitoring, to enhance management strategies and ensure the long-term survival of the species in its natural environment.
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In the current study, two euglossine species, Exaerete smaragdina and Eulaema nigrita, a cleptoparasite bee and its host, respectively, were used as models to: (i) access the genetic diversity and population structure of both species, sampled along a wide latitudinal range of Atlantic Forest, where the distribution of El. nigrita and Ex. smaragdina co-occurs; (ii) investigate the evolutionary history of these species through the Atlantic Forest, and in a wider scenario, to examine the evolutionary history of these species across others forest domains.

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Article Synopsis
  • Most studies focus on habitat fragmentation due to human activities, but this research investigates species responses in naturally fragmented areas of the Eastern Amazon.
  • The study collected data on bee diversity and composition from six isolated outcrops in protected areas, examining how isolation and size of the outcrops affect these factors.
  • Results indicated that bee movement isn't hindered by forest barriers, with a total of 118 species found, and suggested that outcrops serve as important supplementary food sources for bees.
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Scaura Schwarz is a small, widely distributed Neotropical genus of stingless bees whose workers and males have the metabasitarsus as broad as or wider than the metatibia. The genus currently includes four valid species. A species complex composed of three additional species are described here as new (S.

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Many single-nucleotide polymorphisms (SNPs) in the non-recombining region of the human Y chromosome have been described in the last decade. High-coverage sequencing has helped to characterize new SNPs, which has in turn increased the level of detail in paternal phylogenies. However, these paternal lineages still provide insufficient information on population history and demography, especially for Native Americans.

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This work tested whether or not populations of Bombus brasiliensis isolated on mountain tops of southeastern Brazil belonged to the same species as populations widespread in lowland areas in the Atlantic coast and westward along the Paraná-river valley. Phylogeographic and population genetic analyses showed that those populations were all conspecific. However, they revealed a previously unrecognized, apparently rare, and potentially endangered species in one of the most threatened biodiversity hotspots of the World, the Brazilian Atlantic Forest.

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Recognising the importance of Chagas disease in Brazil, Bambuí set up epidemiological surveillance for Chagas disease in 1974 and was the first municipality to do so. To ascertain the current epidemiology of Chagas disease in this municipality, 1.782 blood samples from the general population were analysed; 7.

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Eufriesea zhangi Nemésio & Santos Júnior sp. n. is described from the 'Parque Nacional de Ubajara', state of Ceará, northeastern Brazil.

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In 1943, the Center for the Study and Prophylaxis of Chagas Disease, Oswaldo Cruz Foundation, state of Minas Gerais (MG), was created in the municipality of Bambuí to carry out studies related to Chagas disease in the mid-western region of MG. Since that time, several investigations have been conducted to determine the natural habitat of triatomines, but Panstrongylus megistus colonies have never been found in this region. This paper records the first finding of a P.

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