Metal and metalloid distribution in different environmental compartments of the middle Xingu River in the Amazon, Brazil

2017 ◽  
Vol 605-606 ◽  
pp. 66-74 ◽  
Author(s):  
Danielle Regina Gomes Ribeiro ◽  
Henrique Faccin ◽  
Thaís Ramos Dal Molin ◽  
Leandro Machado de Carvalho ◽  
Lílian Lund Amado
2000 ◽  
Vol 41 (2) ◽  
pp. 55-59 ◽  
Author(s):  
J. Fettig ◽  
M. Miethe ◽  
K. Rathke

For ten years, the Division of Applied Science, University of Paderborn, has gained experience with a four-year undergraduate environmental engineering programme. Up to now, more than 400 graduates have successfully entered a professional career, proving that the educational concept is accepted by the employment sector, e.g. consultants, industry and authorities. Important aspects of this concept are the combination of civil engineering - as a core engineering field - with natural environmental sciences in the basic studies, the coverage of all environmental compartments in the main studies before specialisation in one area, and a strong practical component of the curriculum both inside and outside the university.


2021 ◽  
Vol 756 ◽  
pp. 144086
Author(s):  
Sarah Montesdeoca-Esponda ◽  
María Esther Torres-Padrón ◽  
Zoraida Sosa-Ferrera ◽  
José Juan Santana-Rodríguez

2021 ◽  
Vol 31 ◽  
pp. 100306
Author(s):  
Edmundo Wallace Monteiro Lucas ◽  
Francisco de Assis Salviano de Sousa ◽  
Fabrício Daniel dos Santos Silva ◽  
Rodrigo Lins da Rocha Júnior ◽  
David Duarte Cavalcante Pinto ◽  
...  

2021 ◽  
pp. 111373
Author(s):  
Bashir Adelodun ◽  
Fidelis Odedishemi Ajibade ◽  
AbdulGafar Olatunji Tiamiyu ◽  
Nathaniel Azubuike Nwogwu ◽  
Rahmat Gbemisola Ibrahim ◽  
...  

2021 ◽  
pp. 1-8
Author(s):  
Zilca Campos ◽  
Fábio Muniz ◽  
William E. Magnusson ◽  
Guilherme Mourão

Abstract The Belo Monte hydroelectric dam on the Xingu River has the third largest generating capacity of any hydroelectric dam in the world. We conducted surveys of crocodilians (Caiman crocodilus, Paleosuchus trigonatus) by boat in the Xingu River at the site of the dam prior to (2013-2015), and after filling (2016-2017). While the number of C. crocodilus sighted decreased with increasing water level, there was no difference in numbers prior to, and after reservoir filling. The number of P. trigonatus was unaffected by both water level prior to and after reservoir filling. Reservoir filling had little effect on the number of crocodilians using the forest around the Xingu River reservoir. Most crocodilians seen in forest surveys were P. trigonatus, both before and after reservoir filling, but C. crocodilus was recorded occasionally in the forest. It seems that most Amazonian crocodilians are sufficiently generalist to adapt to the new conditions created by the construction of dams, at least in the short-term. However, there may be long-term collateral effects on crocodilian populations from dams, due to as deforestation and improved access for hunters.


2015 ◽  
Vol 8 (2) ◽  
pp. 33-45 ◽  
Author(s):  
K.M. Kasiotis ◽  
K. Machera

Summary Neonicotinoids (NNDs) constitute a major class of insecticides with a broad and versatile spectrum of applications in agriculture. Hence, their residues are found in several environmental compartments and can be transferred via several pathways to numerous organisms. Despite their profound impact on honeybees and wild bees (impairment of memory, impact on immune system), their presence in humans is far less reported, possibly due to the low to moderate toxicological effects that they elicit. The aim of the present review is to emphasize on developments in the biomonitoring of NNDs. It focuses mainly on chromatographic analysis of NNDs and their metabolites in human biological fluids, discussing key features, such as sample preparation and analytical method validation. Nonetheless, case reports regarding intoxication incidents are presented, highlighting the significance of such cases especially in the developing world.


2015 ◽  
Vol 75 (3 suppl 1) ◽  
pp. 112-124 ◽  
Author(s):  
M. Camargo ◽  
T. Giarrizzo ◽  
VJ. Isaac

Abstract This study estimates the main biological parameters, including growth rates, asymptotic length, mortality, consumption by biomass, biological yield, and biomass, for the most abundant fish species found on the middle Xingu River, prior to the construction of the Belo Monte Dam. The specimens collected in experimental catches were analysed with empirical equations and length-based FISAT methods. For the 63 fish species studied, high growth rates (K) and high natural mortality (M) were related to early sexual maturation and low longevity. The predominance of species with short life cycles and a reduced number of age classes, determines high rates of stock turnover, which indicates high productivity for fisheries, and a low risk of overfishing.


Check List ◽  
2012 ◽  
Vol 8 (3) ◽  
pp. 592 ◽  
Author(s):  
Fernando C. P. Dagosta ◽  
Murilo N. L. Pastana ◽  
André L. H. Esguícero

The first report of Sartor (Anostomidae) and Tatia intermedia (Auchenipteridae) for the Upper Tapajós River Basin are presented here. Sartor is very rare on collections, and is reported only from the Trombetas, Tocantins and Upper Xingu river basins. Tatia intermedia is registered in the upper reaches of the Araguaia, Tocantins, Xingu, and Capim rivers, tributaries of the lower Amazon River in Brazil, northwards to the Suriname coastal rivers and the Essequibo River in Guyana.


Author(s):  
Md. Isreq Hossen Real ◽  
Asef Redwan ◽  
Md. Mosheur Rahman Shourov ◽  
Hossain Azam ◽  
Nehreen Majed

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