Basic cytogenetics and physical mapping of 5S and 18S ribosomal genes in Hoplias malabaricus (Osteichthyes, Characiformes, Erythrinidae) from isolated natural lagoons: a conserved karyomorph along the Iguaçu river basin

Hoplias malabaricus (trahyra) is a widespread fish species over the Neotropical region with diversified inter-populational karyotypes (cytotypes), which may correspond to a species complex. Despite the wide distribution in the South American basins, some authors have questioned its natural origin in the Iguaçu river, an important Brazilian river basin which is characterized by several endemic fish species. We have analyzed the karyotype of H. malabaricus from different collection sites of this river, by conventional and banding methods. Our results, in addition to our previous data concerning geographic distribution of the cytotypes, contribute to better understand the origin of H. malabaricus on the Iguaçu river, reinforcing the proposition that it is a natural fish species in this river basin.

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Comparative study on the physical mapping of ribosomal genes and repetitive sequences in Friesella schrottkyi (Friese, 1900) (Hymenoptera: Apidae, Meliponini)

Zoologischer Anzeiger ◽

10.1016/j.jcz.2021.04.006 ◽

2021 ◽

Author(s):

Arthur Mayrink Elizeu ◽

Natalia Martins Travenzoli ◽

Riudo de Paiva Ferreira ◽

Denilce Meneses Lopes ◽

Mara Garcia Tavares

Keyword(s):

Comparative Study ◽

Physical Mapping ◽

Repetitive Sequences ◽

Ribosomal Genes ◽

Friesella Schrottkyi

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

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132003000300010 ◽

2003 ◽

Vol 46 (3) ◽

pp. 383-394 ◽

Cited By ~ 10

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.

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Digenea of Hoplias intermedius and Hoplias malabaricus (Actinopterygii, Erythrinidae) from upper São Francisco River, Brazil

Revista Brasileira de Parasitologia Veterinária ◽

10.1590/s1984-29612015038 ◽

2015 ◽

Vol 24 (2) ◽

pp. 129-135 ◽

Cited By ~ 7

Author(s):

Danielle Priscilla Correia Costa ◽

Cassandra Moraes Monteiro ◽

Marilia Carvalho Brasil-Sato

Keyword(s):

River Basin ◽

Feeding Habits ◽

Minas Gerais ◽

New Host ◽

Hoplias Malabaricus ◽

Parasitic Fauna ◽

Sao Francisco River ◽

São Francisco River ◽

New Location

A total of 103 specimens of Hoplias intermedius (Günther, 1864) and 86 specimens of H. malabaricus (Bloch, 1794) from the upper São Francisco River, State of Minas Gerais were collected between April 2011 and August 2013, and their parasitic fauna were investigated. Four species of Digenea were found: metacercariae of Austrodiplostomum sp., and Ithyoclinostomum sp.; and adult specimens of Phyllodistomum spatula Odhner, 1902, and Pseudosellacotyla lutzi (Freitas, 1941) Yamaguti, 1954. The prevalence of the metacercariae was higher than that of the adult digeneans of erythrinids from the upper São Francisco River as a result of piscivorous feeding habits of these adult erythrinids. The presence of metacercariae and adult digeneans indicate that they act as intermediate and definitive hosts, respectively, in their biological cycles. Hoplias intermedius is a new host for the four species of Digenea, and the São Francisco River basin is a new location for the known geographical distributions of P. spatula and P. lutzi.

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

Biota Neotropica ◽

10.1590/1676-0611-bn-2015-0117 ◽

2016 ◽

Vol 16 (3) ◽

Cited By ~ 6

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.

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

RBRH ◽

10.1590/2318-0331.011616029 ◽

2016 ◽

Vol 21 (4) ◽

pp. 728-741 ◽

Cited By ~ 2

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.

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Nucleotide variation and physical mapping of ribosomal genes using FISH in genus Tor (Pisces, Cyprinidae)

Molecular Biology Reports ◽

10.1007/s11033-010-0405-7 ◽

2010 ◽

Vol 38 (4) ◽

pp. 2637-2647 ◽

Cited By ~ 7

Author(s):

Indra Mani ◽

Ravindra Kumar ◽

Mamta Singh ◽

N. S. Nagpure ◽

B. Kushwaha ◽

...

Keyword(s):

Physical Mapping ◽

Ribosomal Genes ◽

Nucleotide Variation

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Karyotype Analysis and Mapping of the 18S and 5S Ribosomal Genes in Astyanax fasciatus (Teleostei, Characiformes) from Paranapanema River Basin

CYTOLOGIA ◽

10.1508/cytologia.74.295 ◽

2009 ◽

Vol 74 (3) ◽

pp. 295-300 ◽

Cited By ~ 4

Author(s):

Carlos Alexandre Fernandes ◽

Isabel Cristina Martins-Santos ◽

Dayani Bailly

Keyword(s):

River Basin ◽

Karyotype Analysis ◽

Ribosomal Genes ◽

Astyanax Fasciatus

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

Acta Scientiarum Biological Sciences ◽

10.4025/actascibiolsci.v41i1.47720 ◽

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.

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