CEMAVE
URI permanente desta comunidadehttps://bdc.icmbio.gov.br/handle/cecav/1399
Centro Nacional de Pesquisa e Conservação de Aves Silvestres
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3 resultados
Resultados da Pesquisa
Item Spix’s Macaw Cyanopsitta spixii (Wagler, 1832) population viability analysis(Bird Conservation International, 2023) Vercillo, Ugo; Oliveira-Santos, Luiz Gustavo; Novaes, Marisa; Purchase, Cromwell; Purchase, Candice; Lugarini, Camile; Ferreira, Ariane; De Marco, Paulo; Marcuk, Vladislav; Franco, José LuisSpix’s Macaw Cyanopsitta spixii is one of the most endangered Neotropical Psittacidae species. Extinct in the wild in the year 2000, in June 2022 the first cohort of C. spixii was reintroduced to its original habitat. For a successful reintroduction of the species, it is necessary to examine the viability of the population against natural and external threats and the environmental requirements for success. Thus, this paper presents a “Population Viability Analysis” (PVA) for Spix’s Macaw. It used the Vortex and RangeShiftR software, biological and environmental data from a bibliographic survey, and information provided by the field team responsible for the reintroduction of the species, and who work directly with the species in captivity. We found that the minimum viable population (MVP) for reintro duction of the species is 20 individuals. However, considering the impact of disease, drought, hunting, and illegal trafficking, this population can only persist if the release of individuals from captivity occurs annually over the next 20 years combined with the reforestation of natural habitat to support population growth.Item Similar regional‑scale survival of tropical and southern temperate birds from the New World(Oecologia, 2023) França, Leonardo Fernandes; Silva, Clarisse Caroline de Oliveira e; Pinho, João Batista de; Prestes, Nêmora Pauletti; Cueto, Victor R.; Alves, Maria Alice S.; Schunck, Fabio; Fontana, Carla Suertegaray; Lugarini, Camile; Martinez, Jaime; Sagario, M. Cecilia; Casenave, Javier Lopez de; Vecchi, Maurício B.; Repenning, Márcio; Ferreira, Ariane; Dias, Raphael Igor; Passos, Daniel CunhaThe general assumption that the survival patterns of tropical and southern temperate birds are similar lacks empirical data from higher latitudes. Regional comparisons of New World species are rare, and this assumption has been based on data from African studies. Here, we estimate the survival rates of 88 tropical and southern temperate bird populations (69 spe cies) from eight localities in South America to evaluate the hypothesis that the survival of these populations is homogeneous at the regional scale. We estimated survival based on the Cormack-Jolly-Seber model and compared values from diferent environments. The survival estimates ranged from 0.30 to 0.80 (0.56±0.12). Apparent survival did not difer signifcantly between low-latitude tropical environments (03°S) and the other sites from high-latitudes (between 22° and 34°S). Despite a predicted positive trend, body size was not signifcantly related to survival among passerines. On the other hand, phyloge netic relationships explained more than a third of the variation in bird survival. Based on the largest available database on South American bird species, our fndings support the hypothesis that bird survival is homogeneous, at the regional scale, along the southern hemisphere. In particular, we reinforce the hypothesis that climatic variation has a limited infuence on bird survival in the southern hemisphere.Item Free-living birds from Caatinga and Atlantic Forest of northeast Brazil as hosts of Enterobacterales, Mycoplasma spp., and Chlamydia psittaci(Ornithology Research, 2021) Lugarini, Camile; Silva, Luana T. R.; Amorim, Marcus M. R. de; Lima, Débora C. V. de; Santos, Sandra B.; Saidenberg, André B.Apparently healthy birds in protected areas in northeastern Brazil were investigated, whether shedding bacterial pathogens to the environment. We determined whether pathogens varied according to the level of the shared habitat human of each protected area, the type of vegetation, hosts’ group and different history traits as migration and foraging behavior, body mass, and sensitivity to human impacts. In addition, we also investigated whether the protected areas were preserving the wildlife from antibiotic-resistant bacteria. For that, oropharyngeal and cloacal swabs were collected from 507 individuals of 91 species. In the culture-dependent method, most of the bacterial isolates belonged to Enterobacterales, with the highest frequency of Klebsiella aerogenes (20.5%) and Escherichia coli (19.3%). There was no relationship between Enterobacterales occurrence according to the type of vegetation, hosts’ group and history traits as foraging behavior (foraging stratum and main trophic category), and body mass, and there was a low association between the protected area and Enterobacterales (φ = 0.17). For Mycoplasma, 10.8% of PCR-tested individuals were positive, with high variation among sampled families, but none of them was positive for M. gallisepticum and M. synoviae. The protected area closer to human settlements presented more resistant isolates to broad-spectrum antibiotics gentamicin (φ = 0.45) and tetracycline (φ = 0.37) and also presented the two positive samples to primary pathogenic Chlamydia psittaci. The birds in the sampled protected areas may host and spread potentially pathogenic microorganisms as C. psittaci and Citrobacter freundii in low frequency in balanced co-existence of host/parasite. However, antibiotic-resistant Enterobacterales in protected areas might represent an impact on its bird populations and on the conservation of the environment.