Occurrence of the alien invasive loach Misgurnus anguillicaudatus in the Iguaçu River basin in southern Brazil: a note of concern

2012 ◽  
Vol 29 (1) ◽  
pp. 257-259 ◽  
Author(s):  
V. Abilhoa ◽  
H. Bornatowski ◽  
J. R. S. Vitule
Keyword(s):  
River Basin ◽  
Misgurnus Anguillicaudatus ◽  
Southern Brazil ◽  
Iguaçu River

A new species of Aegla Leach, 1820 (Crustacea, Anomura) from the Iguaçu River basin, Brazil

Zootaxa ◽  
2018 ◽  
Vol 4527 (3) ◽  
pp. 335 ◽  
Author(s):  
FERNANDA POLLI PÁEZ ◽  
INGRID COSTA MARÇAL ◽  
LENICE SOUZA-SHIBATTA ◽  
RAFAEL AUGUSTO GREGATI ◽  
SILVIA HELENA SOFIA ◽  
...  
Keyword(s):  
New Species ◽  
River Basin ◽  
Morphological Characteristics ◽  
Molecular Data ◽  
Southern Brazil ◽  
Mitochondrial Coi ◽  
Interspecific Distance ◽  
Morphological And Molecular Data ◽  
A New Species ◽  
Iguaçu River

A new species of aeglid crab, Aegla okora n. sp., is described. This species was found in the Iguaçu River basin in Paraná state, southern Brazil. Aegla okora n. sp. was discriminated based on morphological and molecular data (mitochondrial COI). Morphologically, the new species differs from congeners of the same river basin by the presence of a trapezoidal areola and the ventromesial border of the ischium having three tubercles, besides other exclusive additional morphological characteristics. Molecular results demonstrated that there is no overlap between the intraspecific distances of Aegla okora n. sp. and the interspecific distance of other species of Aegla added to the analysis, confirming the separation of species and increasing the known diversity of the Iguaçu River basin. 

scholarly journals Cytogenetic description of Ancistrus abilhoai (Siluriformes: Loricariidae) from Iguaçu River basin, southern Brazil

2015 ◽  
Vol 14 (2) ◽  
pp. 4051-4057 ◽  
Author(s):  
M.O. Ribeiro ◽  
R.B. Noleto ◽  
C.A. Lorscheider ◽  
F.E. Porto ◽  
A.C. Prizon ◽  
...  
Keyword(s):  
River Basin ◽  
Southern Brazil ◽  
Iguaçu River

Monitoring the Genotoxic and Cytotoxic Potential and the Presence of Pesticides and Hydrocarbons in Water of the Sinos River Basin, Southern Brazil

2017 ◽  
Vol 72 (3) ◽  
pp. 321-334 ◽  
Author(s):  
Eloisa Bianchi ◽  
Gustavo Lessing ◽  
Karisa Roxo Brina ◽  
Larissa Angeli ◽  
Natália Bordin Andriguetti ◽  
...  
Keyword(s):  
River Basin ◽  
Southern Brazil ◽  
Cytotoxic Potential

scholarly journals Limnological study of Piraquara river (Upper Iguaçu basin): spatiotemporal variation of physical and chemical variables and watershed zoning

2003 ◽  
Vol 46 (3) ◽  
pp. 383-394 ◽  
Author(s):  
Paulo Henrique C. Marques ◽  
Haydée Torres de Oliveira ◽  
Eunice da Costa Machado
Keyword(s):  
River Basin ◽  
Oxygen Demand ◽  
Principal Component ◽  
Serra Do Mar ◽  
Spatial Gradients ◽  
Water Composition ◽  
Physical And Chemical Variables ◽  
Nitrite Nitrate ◽  
Physical And Chemical ◽  
Iguaçu River

The Piraquara river basin (Upper Iguaçu River basin - Brazil) was studied as an ecological system throughout a complete seasonal cycle, comprising the rainy and dry season. Analyzes of 16 physical and chemical water variables (dissolved oxygen, biochemical oxygen demand, temperature, pH, conductivity, total nitrogen, total phosphorus, ortophosphates, nitrite, nitrate, ammonium, reagent silicate, total suspended solids, chlorophyll - a, flow velocity and depth) showed correlations between water composition and watershed physiographic features, and the Principal Component Analysis allowed to evidence spatial gradients and seasonal differences. The sampling points were clustered in patches with homogeneous behavior, according to ecologycal concepts: patch 1, with strong influence of Serra do Mar mountains; patch 2, medium course, under Piraquara Dam influence and patch 3, under wetlands influence. Two main factors of serial discontinuity were identified: the Piraquara dam effect and the influence of wetlands. The watershed zoning based on limnological characteristics seeks to subsidize research and biomonitoring for this public springs area.

scholarly journals Ichthyofauna of streams from the lower Iguaçu River basin, Paraná State, Brazil

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Crislei Larentis ◽  
Rosilene Luciana Delariva ◽  
Louise Cristina Gomes ◽  
Dirceu Baumgartner ◽  
Igor Paiva Ramos ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Fauna ◽  
Main Channel ◽  
Indicator Species Analysis ◽  
Irreversible Loss ◽  
Species Analysis ◽  
Geomorphological Processes ◽  
Nmds Analysis ◽  
Iguaçu River

Abstract The drainages of the Iguaçu River basin, as well as the main channel of the river, have peculiar characteristics resulting from geomorphological processes in this area, including the formation of the Iguaçu River Falls. This slope in the lower portion of the basin is a biogeographical barrier to many organisms. In this study was inventoried the fish fauna of streams of the lower Iguaçu River basin, evaluating possible differences in the species composition upstream and downstream of this biogeographical barrier. Sampling were conducted between 2004 and 2013, in five streams, three upstream and two downstream of the Iguaçu River Falls, using electrofishing. The nMDS analysis was run to investigate possible groupings of similar fauna between the streams sampled. The scores of this test were tested as to the significance of groupings with the Hotelling T2 test. The indicator value method (IndVal) was used to detect the distribution of species among the groups of the streams upstream and downstream of the Iguaçu River Falls. We collected 18,908 individuals of six orders, 11 families, and 40 species. Siluriformes and Characiformes had the highest species richness; Cyprinodontiformes presented the highest abundance. Considering the species recorded, 21 are considered natives to the Iguaçu River basin, including 15 endemic, wich were found only in streams upstream of the falls. Additional 18 species were verified only in the streams downstream of such barrier. Four species were common to both stretches. The axis 1 of the nMDS separated two groups: streams upstream (S1, S2 and S3) and streams downstream of the Iguaçu River Falls (S4 and S5). The indicator species analysis also indicated a distinction between the groups of streams, that were significantly different (Hotelling's T2 = 234.36, p ˂ 0.0001). The number of endemic species in the streams upstream of the Falls (15 spp.) evidences a significant effect of isolation promoted by the Iguaçu River Falls, and confirms the role of this barrier in the vicariant processes and endemism typical of this basin. These results emphasize the importance of conserving these ecosystems, once the extinction of species in this region means the irreversible loss of them.

scholarly journals Water erosion vulnerability and sediment delivery rate in upper Iguaçu river basin – Paraná

RBRH ◽  
2016 ◽  
Vol 21 (4) ◽  
pp. 728-741 ◽  
Author(s):  
Matheus Fonseca Durães ◽  
José Alexandre Pinto Coelho Filho ◽  
Vinícius Augusto de Oliveira
Keyword(s):  
Land Use ◽  
River Basin ◽  
Water Erosion ◽  
Sustainable Land Use ◽  
Delivery Rate ◽  
Sediment Delivery ◽  
Solid Discharge ◽  
Risk Areas ◽  
Gis Environment ◽  
Iguaçu River

ABSTRACT Soil erosion is one of the most striking environmental degradation processes, which its mapping and assessment is an important tool for management activities and natural resource management in river basins, allowing managers to implement policies and sustainable land use occupation. This work aimed to apply the Revised Universal Soil Loss Equation (RUSLE) in a GIS environment in the upper Iguaçu river basin, located at Paraná State, in order to assess the vulnerability to water erosion as well as the concentration of dissolved solids in suspension to estimate the solid discharge and sediment delivery rate, allowing the identification of more susceptible areas to water erosion. The results showed that over 23.52% of the upper Iguaçu river basin presented soil losses below 2.5 t ha–1 yr–1, meaning current low potential for erosion. Regarding the solid discharge, the basin has values ranging from low to very high, also leading to high values for sediment delivery rate. The identification of risk areas associated with accelerated erosion, carried out in this study provide important information for measures associated with the management, conservation and planning of land use in the basin, which is highly relevant for predicting development of various scenarios for the state Paraná for its hydroelectric potential.

scholarly journals Reproductive indicators of the endemic species Astyanax bifasciatus (Teleostei: Characidae) in a tributary of the Lower Iguaçu River Basin, Brazil

2019 ◽  
Vol 41 ◽  
pp. e47720
Author(s):  
Elton Celton de Oliveira ◽  
Alexandre Augusto Auache-Filho ◽  
Denis Damasio ◽  
Nédia de Castilhos Ghisi ◽  
Maria Antônia Michels-Souza
Keyword(s):  
River Basin ◽  
Fish Species ◽  
Sexual Maturity ◽  
Gonadosomatic Index ◽  
Reproductive Period ◽  
Maturity Stage ◽  
Reproductive Process ◽  
Maturation Stages ◽  
High Degree ◽  
Iguaçu River

The reproductive process promotes morphophysiological and behavioral changes in fish species throughout their life cycle. Its success is vital to define their resilience in the environment. This study aimed to evaluate the reproductive biology of the endemic fish species Astyanax bifasciatus in a tributary of the Lower Iguaçu River Basin, Paraná, Brazil. Fish were collected monthly at four sites along the Jirau Alto River in the city of Dois Vizinhos from October 2015 to September 2016. A standardized catch effort with gill nets and fish traps was used. In the laboratory, standard length and total weight were recorded. After anesthesia, the animals were sectioned to macroscopically determine the sex, sexual maturity stage, and presence of celomatic fat. The gonads and liver were removed to determine the gonadosomatic and hepatosomatic indexes, respectively. A total of 160 individuals (104 females and 56 males) were used. The gonadosomatic index, frequency of the gonadal maturation stages, and condition factor showed a long reproductive period with two investment cycles for both sex. Length at first sexual maturity was 4.57 cm for females and 3.56 cm for males. The reproductive data corroborate the generalist profile of the species and demonstrate a high degree of adaptive capacity, even in smaller tributaries.

Chemical composition of rainwater in the Sinos River Basin, Southern Brazil: a source apportionment study

2018 ◽  
Vol 25 (24) ◽  
pp. 24150-24161 ◽  
Author(s):  
Darlan Daniel Alves ◽  
Ezequiele Backes ◽  
Ledyane Rocha-Uriartt ◽  
Roberta Plangg Riegel ◽  
Daniela Müller de Quevedo ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Source Apportionment ◽  
River Basin ◽  
Southern Brazil

Bioavailability of pollutants sets risk of exposure to biota and human population in reservoirs from Iguaçu River (Southern Brazil)

2016 ◽  
Vol 23 (18) ◽  
pp. 18111-18128 ◽  
Author(s):  
F.Y. Yamamoto ◽  
M.V.M. Pereira ◽  
E. Lottermann ◽  
G.S. Santos ◽  
T.R.O. Stremel ◽  
...  
Keyword(s):  
Human Population ◽  
Southern Brazil ◽  
Risk Of Exposure ◽  
Iguaçu River
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