Characidium xavante was described from two tributaries of the Culuene River drainage, in the upper Xingu River basin. New samplings recorded the species for streams from the Kaaiapó River drainage (Teles Pires River drainage, upper Tapajós River basin) with additional specimens also recorded in the Xingu River basin, Paranatinga municipality, Mato Grosso State, Brazil. The new records represent an extension of the geographical distribution of the species, that from now on fits in a pattern of distribution known to be shared with other ca. 20 species of fishes. We suggest that Characidium xavante could be classified as Least Concern (LC), according to the International Union for Conservation of Nature Standards and Petitions Committee (IUCN).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1590/0001-3765202120210281 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
ACCUMULATION OF TRACE ELEMENTS IN SOIL AND FAUNA WITHIN A SITE HISTORICALLY CONTAMINATED WITH COAL COMBUSTION RESIDUES.
Environ Toxicol Chem
January 2025
Savannah River Ecology Lab, University of Georgia, Aiken, SC, USA.
Legacy contaminants tied to energy production are a worldwide concern. Coal combustion residues (CCRs) contain high concentrations of potentially toxic trace elements such as arsenic (As), mercury (Hg), and selenium (Se), which can persist for decades after initial contamination. CCR disposal methods, including aquatic settling basins and landfills, can facilitate environmental exposure through intentional and accidental releases.
View Article and Find Full Text PDFSynchronicity Between the Rates of Reaeration and Pollutants Degradation During Self-Purification in a Large River.
Bull Environ Contam Toxicol
January 2025
College of Environment and Ecology, Chongqing University, Chongqing, 400045, China.
The pollutants after were discharged into the water can gradually degrade through the self-purification. The oxygen consumption and pollutant degradation rates characterize the self-purification of small and medium-sized streams, while the dynamics of the two characteristics for large rivers has not been reported yet. The in-situ investigation for 297 sites in the 1700 km stream of the Yangtze River was conducted.
View Article and Find Full Text PDFSystematic Review and Spatiotemporal Assessment of Mercury Concentration in Fish from the Tapajós River Basin: Implications for Environmental and Human Health.
ACS Environ Au
January 2025
Programa de Pós-Graduação em Biodiversidade e Biotecnologia (REDE BIONORTE), Instituto de Saúde Coletiva (ISCO), Universidade Federal do Oeste do Pará (UFOPA), Rua Vera Paz, s/no, Salé, CEP, 68040-255 Santarém, Pará, Brazil.
This study reviews the literature on mercury (Hg) pollution in the Tapajós River basin from 1992 to 2022, focusing on the bioaccumulation in fish and the associated health risks to humans via ingesting contaminated species. Variability in Hg bioaccumulation was analyzed from both spatial (sub-basins) and ecological (trophic levels) perspectives. Mercury concentrations in fish muscle tissue and spatial differences in Hg levels were analyzed using nonparametric Kruskal-Wallis ANOVA and mapped with Inverse Distance Weighting.
View Article and Find Full Text PDFSpatio-Temporal Changes in Effective Population Size in an Expanding Metapopulation of Eurasian Otters.
Evol Appl
January 2025
Organisms and Environment, School of Biosciences and Water Research Institute Cardiff University Wales UK.
Conservation efforts are leading to demographic growth and spatial expansion of some previously endangered species. However, past population bottlenecks or population size fluctuations can have lasting effects on effective population size ( ), even when census size ( ) appears large or recovered. The UK metapopulation of Eurasian otters () has a well-documented history of population recovery over recent decades, with indicators of presence (faeces and footprints) increasing in distribution and number over successive national surveys.
View Article and Find Full Text PDFPersistence and connectivity of in-channel waterholes in the Darling (Baaka) River - An analysis using satellite imagery and graph theory.
J Environ Manage
January 2025
Australian Rivers Institute, Griffith University, Nathan, Queensland, Australia.
In-channel persistent surface water provides critical refuge habitat for aquatic organisms in intermittently flowing rivers. Quantifying the flows that maintain connectivity among persistent waterholes is important for managing river flows to maintain refuges, improve their quality and facilitate connectivity and nutrient and energy transport. This study aimed to quantify spatial and temporal waterhole persistence and connectivity in a 664 km reach of the Darling River in Australia's Murray-Darling Basin.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!