Amazonia forest plays a major role in providing ecosystem services for human and sanctuaries for wildlife. However, ongoing deforestation and habitat fragmentation in the Brazilian Amazon has threatened both. The ocelot is an ecologically important mesopredator and a potential conservation ambassador species, yet there are no previous studies on its habitat preference and spatial patterns in this biome. From 2010 to 2017, twelve sites were surveyed, totaling 899 camera trap stations, the largest known dataset for this species. Using occupancy modeling incorporating spatial autocorrelation, we assessed habitat use for ocelot populations across the Brazilian Amazon. Our results revealed a positive sigmoidal correlation between remote-sensing derived metrics of forest cover, disjunct core area density, elevation, distance to roads, distance to settlements and habitat use, and that habitat use by ocelots was negatively associated with slope and distance to river/lake. These findings shed light on the regional scale habitat use of ocelots and indicate important species-habitat relationships, thus providing valuable information for conservation management and land-use planning.
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http://dx.doi.org/10.1002/ece3.5005 | DOI Listing |
Clin Infect Dis
January 2025
Fundação de Medicina Tropical Dr Heitor Vieira Dourado, Manaus, Brazil.
Background: Daily primaquine-induced hemolysis is a common cause of complications during Plasmodium vivax malaria treatment in individuals with glucose 6-phosphate dehydrogenase deficiency (G6PDd). Alternative regimens balancing safety and efficacy are needed.
Methods: G6PDd participants with P.
J Fish Biol
January 2025
Laboratory of Ecophysiology and Molecular Evolution, Brazilian National Institute for Research of the Amazon (INPA), Manaus, Brazil.
The tambaqui (Colossoma macropomum, G. Cuvier 1818) thrives both in the ion-poor waters of the Amazon and in commercial aquaculture. In both, environmental conditions can be harsh due to low ion levels, occasional high salt challenges (in aquaculture), low pH, extreme PO levels (hypoxia and hyperoxia), high PCO levels (hypercapnia), high ammonia levels (in aquaculture), and high and low temperatures.
View Article and Find Full Text PDFEcotoxicology
January 2025
Programa de Pós‑Graduação em Ciências Ambientais, Centro de Pesquisa em Limnologia, Biodiversidade e Etnobiologia do Pantanal, Universidade do Estado de Mato Grosso, Cáceres, Mato Grosso, Brasil.
Hydroelectric reservoirs favor mercury contamination in biota, but the contamination in cascade reservoirs is not yet clear. We investigated total mercury (THg) contamination in fish in four cascade reservoirs in the Brazilian Amazon between August 2022 and April 2023. Overall, downstream predatory fish showed higher mercury concentrations than those upstream.
View Article and Find Full Text PDFCien Saude Colet
December 2024
Núcleo de Estudos da Diferença e das Desigualdades na Saúde Coletiva (NUEDI), Departamento de Saúde e Sociedade, Universidade de São Paulo. Av. Dr. Arnaldo 715, Pacaembu. 01246-904 São Paulo SP Brasil.
Primarily since the early 2000s, Indigenous peoples in Brazil have become beneficiaries of social security and income transfer policies, such as the program known as Bolsa Família (Family Allowance). Few field studies have evaluated the magnitude and significance of monetarization in Indigenous social lives and economies. To this end, between 2019 and 2020, the present work conducted an ethnographic study and survey in two villages of the Rikbaktsa people in the Brazilian Amazon.
View Article and Find Full Text PDFViruses
November 2024
Centre for Biological and Health Sciences, Pará State University, Belém 66087-662, PA, Brazil.
The biting midges Latreille, 1809 (Diptera: Ceratopogonidae) is highly relevant to epidemiology and public health, as it includes species that are potential vectors of human and animal arboviruses. The aim of this study was to investigate the presence of RNA viruses in species of the genus collected in the Carajás mining complex in the state of Pará. The biting midges were collected in the municipalities of Canaã dos Carajás, Curionópolis and Marabá and morphologically identified.
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