scholarly journals Genetic Diversity and Potential Paths of Transmission of Mycobacterium bovis in the Amazon: The Discovery of M. bovis Lineage Lb1 Circulating in South America

2021 ◽  
Vol 8 ◽  
Author(s):  
Paulo Alex Carneiro ◽  
Cristina Kraemer Zimpel ◽  
Taynara Nunes Pasquatti ◽  
Taiana T. Silva-Pereira ◽  
Haruo Takatani ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
South America ◽  
River Basin ◽  
Mycobacterium Bovis ◽  
Genomic Diversity ◽  
Amazon River ◽  
Amazon River Basin ◽  
River Region ◽  
Significant Difference ◽  
Marajó Island

Bovine tuberculosis (bTB) has yet to be eradicated in Brazil. Herds of cattle and buffalo are important sources of revenue to people living in the banks of the Amazon River basin. A better understanding of Mycobacterium bovis (M. bovis) populational structure and transmission dynamics affecting these animals can significantly contribute in efforts to improve their sanitary status. Herein, we sequenced the whole genome of 22 M. bovis isolates (15 from buffalo and 7 from cattle) from 10 municipalities in the region of the Lower Amazon River Basin in Brazil and performed phylogenomic analysis and Single Nucleotide Polymorphism (SNP)-based transmission inference to evaluate population structure and transmission networks. Additionally, we compared these genomes to others obtained in unrelated studies in the Marajó Island (n = 15) and worldwide (n = 128) to understand strain diversity in the Amazon and to infer M. bovis lineages. Our results show a higher genomic diversity of M. bovis genomes obtained in the Lower Amazon River region when compared to the Marajó Island, while no significant difference was observed between M. bovis genomes obtained from cattle and buffalo (p ≥ 0.05). This high genetic diversity is reflected by the weak phylogenetic clustering of M. bovis from the Lower Amazon River region based on geographic proximity and in the detection of only two putative transmission clusters in the region. One of these clusters is the first description of inter-species transmission between cattle and buffalo in the Amazon, bringing implications to the bTB control program. Surprisingly, two M. bovis lineages were detected in our dataset, namely Lb1 and Lb3, constituting the first description of Lb1 in South America. Most of the strains of this study (13/22) and all 15 strains of the Marajó Island carried no clonal complex marker, suggesting that the recent lineage classification better describe the diversity of M. bovis in the Amazon.

Magosternarchus, a New Genus with Two New Species of Electric Fishes (Gymnotiformes: Apteronotidae) from the Amazon River Basin, South America

Copeia ◽  
1996 ◽  
Vol 1996 (3) ◽  
pp. 657 ◽  
Author(s):  
John G. Lundberg ◽  
Cristina Cox Fernandes ◽  
James Spurling Albert ◽  
Marcelo Garcia
Keyword(s):  
New Species ◽  
South America ◽  
River Basin ◽  
New Genus ◽  
Amazon River ◽  
Amazon River Basin ◽  
Two New Species ◽  
Electric Fishes

Neotropical Turtle Blood Flukes: Two New Genera and Species from the Amazon River Basin with a Key to Genera and Comments on a Marine-Derived Parasite Lineage in South America

10.1645/19-27 ◽  
2019 ◽  
Vol 105 (4) ◽  
pp. 497 ◽  
Author(s):  
Stephen A. Bullard ◽  
Jackson R. Roberts ◽  
Micah B. Warren ◽  
Haley R. Dutton ◽  
Nathan V. Whelan ◽  
...  
Keyword(s):  
South America ◽  
River Basin ◽  
Amazon River ◽  
New Genera ◽  
Amazon River Basin ◽  
Parasite Lineage ◽  
Blood Flukes

scholarly journals Neotropical Monogenoidea. 3. Five new species from South America with the proposal of Tereancistrum gen. n. and Trinibaculum gen. n. (Dactylogyridae: Ancyrocephalinae)

1980 ◽  
Vol 10 (2) ◽  
pp. 411-417 ◽  
Author(s):  
Delane C. Kritsky ◽  
Vernon E. Thatcher ◽  
Robert J. Kayton
Keyword(s):  
New Species ◽  
South America ◽  
River Basin ◽  
Freshwater Fishes ◽  
Amazon River ◽  
New Genera ◽  
Amazon River Basin

Abstract Five new species of Monogenoidea (Dactylogyridae: Ancyrocephalinae) are described from the gills of freshwater fishes of South America: Jainus amazonensis sp. n., Tereancistrum kerri gen. et sp. n., and Trlnibaculum braziliensis gen. et sp. n. (all) from Brycon melanopterus (Cope), Januacá Lake near Manaus, Amazonas, Brasil; Tereancistrum ornatus sp. n. from Prochilodus reticulatus Steindachner, Rio Cauca, Juanchito, Cali, Valle, Colombia; and T. parvus sp. n. from Leporinus fasciatus (Bloch), Amazon River Basin. Two new genera are proposed. Tereancistrum gen. n. is characterized by having spathulate acessory anchor sclerites associated with the ventral anchors. Trinibaculum gen. n. is proposed for species with a single ventral bar, two widely separated dorsal bars, a dextroventral vagina, confluent intestinal crura, and intercecal gonads.

scholarly journals Genome assembly and annotation of the tambaqui (Colossoma macropomum): an emblematic fish of the Amazon River Basin

Gigabyte ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Alexandre Wagner Silva Hilsdorf ◽  
Marcela Uliano-Silva ◽  
Luiz Lehmann Coutinho ◽  
Horácio Montenegro ◽  
Vera Maria Fonseca Almeida-Val ◽  
...  
Keyword(s):  
River Basin ◽  
Genome Assembly ◽  
Amazon River ◽  
Amazon River Basin ◽  
Colossoma Macropomum

In-stream turbines for sustainable hydropower development in the Amazon river basin

2021 ◽  
Author(s):  
Suyog Chaudhari ◽  
Erik Brown ◽  
Raul Quispe-Abad ◽  
Emilio Moran ◽  
Norbert Mueller ◽  
...  
Keyword(s):  
River Basin ◽  
Large Scale ◽  
Ecological Impacts ◽  
Amazon River ◽  
River Ecology ◽  
Amazon River Basin ◽  
Hydropower Development ◽  
Continental Scale ◽  
Large Dams ◽  
Hydropower Potential

<p>Given the ongoing and planned hydropower development projects in the Amazon River basin, appalling losses in biodiversity, river ecology and river connectivity are inevitable. These hydropower projects are proposed to be built in exceptionally endemic sites, setting records in environmental losses by impeding fish movement, altering flood pulse, causing large-scale deforestation, and increasing greenhouse gas emissions. With the burgeoning energy demand combined with the aforementioned negative impacts of conventional hydropower technology, there is an imminent need to re-think the design of hydropower to avoid the potentially catastrophic consequences of large dams. It is certain that the Amazon will undergo some major hydrological changes in the near future because of the compounded effects of climate change and proposed dams, if built with the conventional hydropower technology. In this study, we present a transformative hydropower outlook that integrates low-head hydropower technology (e.g., in-stream turbines) and multiple environmental aspects, such as river ecology and protected areas. We employ a high resolution (~2km) continental scale hydrological model called LEAF-Hydro-Flood (LHF) to assess the in-stream hydropower potential in the Amazon River basin. We particularly focus on quantifying the potential and feasibility of employing instream turbines in the Amazon instead of building large dams. We show that a significant portion of the total energy planned to be generated from conventional hydropower in the Brazilian Amazon could be harnessed using in-stream turbines that utilize kinetic energy of water without requiring storage. Further, we also find that implementing in-stream turbines as an alternative to large storage-based dams could prove economically feasible, since most of the environmental and social costs associated with dams are eliminated. Our results open multiple pathways to achieve sustainable hydropower development in the Amazon to meet the ever-increasing energy demands while minimizing hydrological, social, and ecological impacts. It also provides important insight for sustainable hydropower development in other global regions. The results presented are based on a manuscript under revision for Nature Sustainability.</p>

scholarly journals The spatial variability of actual evapotranspiration across the Amazon River Basin based on remote sensing products validated with flux towers

2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Victor Hugo da Motta Paca ◽  
Gonzalo E. Espinoza-Dávalos ◽  
Tim M. Hessels ◽  
Daniel Medeiros Moreira ◽  
Georges F. Comair ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Spatial Variability ◽  
River Basin ◽  
Actual Evapotranspiration ◽  
Amazon River ◽  
Amazon River Basin

A new species of Mastiglanis Bockmann 1994 (Siluriformes: Heptapteridae) from the Amazon River basin, Peru

Zootaxa ◽  
2020 ◽  
Vol 4820 (2) ◽  
pp. 323-336
Author(s):  
DARIO R. FAUSTINO-FUSTER ◽  
HERNÁN ORTEGA
Keyword(s):  
New Species ◽  
River Basin ◽  
Morphological Analysis ◽  
Valid Species ◽  
Amazon River ◽  
Freshwater Species ◽  
X Rays ◽  
Amazon River Basin ◽  
A New Species ◽  
Pelvic Fin

Mastiglanis is a genus of heptapterid catfish represented by two valid species. These freshwater species are widely distributed along the Amazon, Orinoco, and Maroni River basins. However, a taxonomic review of specimens collected in the Putumayo and Nanay rivers, Amazon River basin in Peru revealed a new species of Mastiglanis. A morphological analysis was completed for morphometric (36 measurements) and meristic (20 counts) data. Osteological counts and descriptions were made from clear and stained specimens and x-rays images. The new species of Mastiglanis differs from M. asopos and M. durantoni by having a long pelvic fin, short snout, eight branched anal-fin rays, and a higher number of vertebrae and gill rakers. The distribution of the new species is restricted to the upper Amazon River basin.

Sign in / Sign up

Export Citation Format

Share Document