scholarly journals Constitutive heterochromatin heteromorphism in the Neotropical armored catfish Hypostomus regani (Ihering, 1905) (Loricariidae, Hypostominae) from the Paraguay River basin (Mato Grosso do Sul, Brazil)

2019 ◽  
Vol 13 (1) ◽  
pp. 27-39 ◽  
Author(s):  
Greicy Ellen de Brito Ferreira ◽  
Ligia Magrinelli Barbosa ◽  
Ana Camila Prizon-Nakajima ◽  
Suzana de Paiva ◽  
Margarida Maria de Rossi Vieira ◽  
...  
Keyword(s):  
River Basin ◽  
Constitutive Heterochromatin ◽  
5S Rdna ◽  
Pericentromeric Region ◽  
The Novel ◽  
Chromosome Microdissection ◽  
Dapi Staining ◽  
Mato Grosso ◽  
Paraguay River ◽  
Mato Grosso Do Sul

A cytogenetic analysis based on the integration of a number of different chromosomal methodologies, including chromosome microdissection was carried out to characterize the chromosomally polymorphic Hypostomusregani population from the Paraguay River basin, state of Mato Grosso do Sul in Brazil. All specimens had 2n=72 (FN=116) but two distinct karyotype formulas: karyomorph A (12m+14sm+18s+28a) and karyomorph B (13m+14sm+17st+28a). Karyomorph A and B differed only for pair 19 that consisted of two subtelocentrics in karyomorph A and a large metacentric and a subtelocentric in karyomorph B. This heteromorphism was due to extensive heterochromatinization of the short arm of the large metacentric, as highlighted by C-banding. The microdissection of the large metacentric of pair 19 allowed the production of a probe, named HrV (Hypostomusregani Variant), that hybridized to the whole p arm of the large metacentric and the pericentromeric region of the short arm of its (subtelocentric) homologue (karyomorph B) and of both homologs of pair 19 in karyomorph A. Additional cytogenetic techniques (FISH with 18S and 5S rDNA probes, CMA3 and DAPI staining) allowed a finer distinction of the two karyomorphs. These results reinforced the hypothesis that the novel large metacentric of H.regani (karyomorph B) was the result of the amplification of heterochromatin segments, which contributed to karyotypic diversification in this species.

scholarly journals Subterranean biodiversity in the Serra da Bodoquena karst area, Paraguay river basin, Mato Grosso do Sul, Southwestern Brazil

2014 ◽  
Vol 14 (3) ◽  
Author(s):  
Lívia Medeiros Cordeiro ◽  
Rodrigo Borghezan ◽  
Eleonora Trajano
Keyword(s):  
River Basin ◽  
Sustainable Use ◽  
Karst Area ◽  
Karst Aquifers ◽  
Effective Protection ◽  
Mato Grosso ◽  
Base Level ◽  
Paraguay River ◽  
Mato Grosso Do Sul ◽  
Subterranean Species

We present herein a synthesis of faunistic data from caves in the Serra da Bodoquena karst area, middle Paraguay River basin, Mato Grosso do Sul State. Those include phreatic, submerged and dry caves. Emphasis is given to troglobites (exclusively subterranean species), potentially threatened due to their morphological, physiological and behavioral specializations, associated to generally small distributions. The Bodoquena karst area distinguishes as a spot of high diversity of troglobites, such as trichomycterid and heptapterid catfishes, aquatic planarians and gastropods, arachnids (Eusarcus opilionids, ctenid spiders), Polydesmida diplopods, several collembolans, some insects, and Peracarida crustaceans, which include interesting phylogenetic relicts as spelaeogriphaceans. Four geographic compartments corresponding to microbasins, seemingly with biogeographic importance for the subterranean fauna, are recognized. Phreatobic troglobites (Trichomycterus catfishes, aquatic peracarids, planarians) distribute widely across these compartments and some well beyond (the spelaeogriphacean Potiicoara brasiliensis reaches Mato Grosso state), while those living in base-level streams (Rhamdia and Ancistrus catfishes) and the terrestrial ones, that live in the vadose (aerated zone) are generally restricted to one compartment. Many subterranean ecosystems in Mato Grosso do Sul are endangered by several threats described here and urgent actions for effective protection are required to guarantee a sustainable use of the land and the karst aquifers.

scholarly journals Ancistrus cuiabae Knaack, 1999 (Siluriformes: Loricariidae: Ancistrinae): first record for the Southern Pantanal

Check List ◽  
2014 ◽  
Vol 10 (2) ◽  
pp. 380
Author(s):  
Francisco Severo-Neto ◽  
Priscilla Soares Dos Santos ◽  
Eurico A. Sczeny-Moraes ◽  
Fernando Paiva
Keyword(s):  
River Basin ◽  
First Record ◽  
The State ◽  
Mato Grosso ◽  
Paraguay River ◽  
Mato Grosso Do Sul

Ancistrus cuiabae, an easily identified species of armored catfish from the Upper Paraguay River basin has recently been described from the Cuiabá River basin. Its distribution was previously restricted to the state of Mato Grosso. However, here we report the southernmost record of this species, the first within the Mato Grosso do Sul State.

scholarly journals Anurans of a threatened savanna area in western Brazil

2014 ◽  
Vol 14 (1) ◽  
Author(s):  
José Luiz Massao Moreira Sugai ◽  
Juliana de Souza Terra ◽  
Vanda Lúcia Ferreira
Keyword(s):  
South America ◽  
River Basin ◽  
Rainy Season ◽  
Conservation Priorities ◽  
Sampling Effort ◽  
Aquatic Habitats ◽  
Mato Grosso ◽  
Paraguay River ◽  
The World ◽  
Mato Grosso Do Sul

The Upper Paraguay River Basin is located in the center of South America and harbors one of the largest wetland in the world, known as Pantanal. This floodplain is surrounded by uplands, which presently have most of their area converted into pastures or monocultures, besides being poorly known scientifically. Also, most of these upland areas are considered conservation priorities. Here we present a list of anuran species from a savanna-like area (municipality of Camapuã, state of Mato Grosso do Sul, Brazil) inserted in the uplands surrounding the Pantanal floodplain, in the Upper Taquari River sub-basin, and evaluate the effectiveness of the sampling effort. Data were obtained through active searches in 22 plots in aquatic habitats, during the rainy season (from December 2009 to April 2010). We found 26 species, in four families. Although sampling effort was found to sufficiently represent the local anuran assemblage, future inventories in this region should ideally include samplings during the dry and early rainy seasons, and include both active and passive capturing methods.

scholarly journals Juveniles of the piscivorous dourado Salminus brasiliensis mimic the piraputanga Brycon hilarii as an alternative predation tactic

2011 ◽  
Vol 9 (2) ◽  
pp. 351-354 ◽  
Author(s):  
Eduardo Bessa ◽  
Lucélia Nobre Carvalho ◽  
José Sabino ◽  
Paola Tomazzelli
Keyword(s):  
River Basin ◽  
Headwater Streams ◽  
Observation Time ◽  
Body Colour ◽  
Clear Water ◽  
Mato Grosso ◽  
Total Length ◽  
Paraguay River ◽  
Mato Grosso Do Sul ◽  
Salminus Brasiliensis

In the district of Bom Jardim, in Nobres, Mato Grosso State, Brazil, there are clear water streams originating on karstic terrain. The dourado, Salminus brasiliensis, is an apex stalking predator in these streams. In clear waters, where visually oriented prey may perceive predator in advance, surprise is needed for successful attacks. These streams are cohabited by other Characiformes, like the frugivorous piraputanga Brycon hilarii, which lives in schools and exhibits body colour and shape similar to the dourados. Here we describe an alternative predatory tactic for juvenile dourado occurring in headwater streams of the Paraguay River basin, in which they act as an aggressive mimic of the piraputanga. Based on 43 h of observations in Bom Jardim, and on additional 11 h in the Bodoquena Plateau Rivers of Mato Grosso do Sul State, we quantified the number of rushes by dourados when they were among piraputangas or foraging alone, and observed the proportion of piraputangas per dourado in multispecific schools. Dourados of up to 30 cm total length (TL) stayed among the piraputangas of similar size hiding within the school and going to the periphery of the school before rushing against prey. The dourados exhibited colours similar to the piraputangas. They not only stayed longer among piraputangas (78% of the observation time), but also rushed against prey more often than when foraging alone (53 rushes/h against 14 rushes/h, respectively).

scholarly journals Pisces, Aquidauana and Miranda drainages, upper Paraguay River basin, Mato Grosso do Sul, Brazil

Check List ◽  
2010 ◽  
Vol 6 (4) ◽  
pp. 596 ◽  
Author(s):  
Fabrício Barreto Teresa ◽  
Renato De Mei Romero ◽  
Francisco Langeani
Keyword(s):  
River Basin ◽  
Structural Heterogeneity ◽  
The Other ◽  
Mato Grosso ◽  
Streams And Rivers ◽  
Paraguay River ◽  
Factors Influencing ◽  
Main Factors ◽  
Lotic Environments ◽  
Mato Grosso Do Sul

An inventory of the ichthyofauna of the Aquidauana and Miranda basins is presented. A total of 9,559 individuals of six orders, 21 families and 68 species were sampled in streams (n = 6), rivers (n = 2), and reservoirs (n = 5) during the dry and wet seasons. Streams and rivers were the sites with higher richness, with 97% of the total richness. On the other hand, the highest abundance was recorded for reservoirs, with homogeneous assemblages dominated by nektonic species. Structural heterogeneity and proximity to the mainstem seem to be the main factors influencing fish richness in streams. This study reports a high regional richness and reinforces the necessity for the preservation of the lotic environments of the Cerrado.

scholarly journals Astyanax lineatus (Perugia, 1891) (Characiformes: Characidae): first record in the upper Paraná river basin, Mato Grosso do Sul, Brazil

Check List ◽  
2017 ◽  
Vol 13 (2) ◽  
pp. 2094
Author(s):  
Fabiane Silva Ferreira ◽  
Wagner Vicentin ◽  
Yzel Rondon Súarez
Keyword(s):  
River Basin ◽  
First Record ◽  
Paraná River ◽  
Mato Grosso ◽  
Parana River ◽  
Paraguay River ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Mato Grosso Do Sul ◽  
Paraná River Basin

Astyanax lineatus was previously known only from the Paraguay river basin and we report the first record from the Paraná river basin near the municipality of Sidrolândia, Mato Grosso do Sul state, Brazil. The species was found in Lajeado Stream, a tributary of the Anhanduí River, which belongs to the Pardo River sub-basin of the Paraná river basin.

scholarly journals Assemblage of fish species associated with aquatic macrophytes in Porto Murtinho Pantanal, Mato Grosso do Sul, Brazil

2013 ◽  
Vol 13 (2) ◽  
pp. 182-189 ◽  
Author(s):  
Yzel Rondon Súarez ◽  
Fabiane Silva Ferreira ◽  
Karina Keyla Tondato
Keyword(s):  
River Basin ◽  
Range Expansion ◽  
Fish Assemblage ◽  
Aquatic Macrophytes ◽  
Abundant Species ◽  
Distribution Area ◽  
Mato Grosso ◽  
Paraguay River ◽  
First Time ◽  
Mato Grosso Do Sul

The Porto Murtinho Pantanal lies at the limit of the Upper Paraguay River basin, and despite its biogeographical importance, several aspects of the ecology of the fish assemblage are not known. Monthly samples of fish associated with aquatic macrophytes were taken from February 2009 through January 2011. A total of 46,327 individuals were collected, belonging to 144 species. Characiformes and Siluriformes were the predominant orders, and Odontostilbe pequira, O. paraguayensis and Bryconamericus exodon were the most abundant species. Two species, Cynopotamus sp. and Pimelodus mysteriosus, were recorded for the first time in the Pantanal, and a new occurrence record of Cichla piquiti was observed, representing an approximately 400 km range expansion in your distribution area in the Pantanal.

scholarly journals Kinosternon scorpioides scorpioides Linnaeus, 1766: range extension and first records in the upper Paraguay River basin and Mato Grosso do Sul, Brazil

Check List ◽  
2015 ◽  
Vol 11 (3) ◽  
pp. 1631
Author(s):  
Walfrido Moraes Tomas ◽  
Rafael Morais Chiaravalotti ◽  
André Restel Camilo ◽  
Gabriel Oliveira de Freitas
Keyword(s):  
South America ◽  
River Basin ◽  
Species Distribution ◽  
New Records ◽  
Range Extension ◽  
Mato Grosso ◽  
Paraguay River ◽  
Disjunct Populations ◽  
Mud Turtle ◽  
Mato Grosso Do Sul

The Scorpion mud turtle (Kinosternon scorpioides) is the chelonian species with the largest distribution range in the Neotropics. The species is reportedly distributed as two disjunct populations in South America: the Amazonian and the Chacoan populations. We present new records of K. s. scorpioides which represent an expansion of the species distribution, with the first records for the Upper Paraguay River basin, the first records for the Mato Grosso do Sul state, Brazil, as well as an evidence that the two previously documented populations area not disjunct.

scholarly journals First record of Trypanosoma sp. (Protozoa: Kinetoplastida) in tuvira (Gymnotus aff. inaequilabiatus) in the Pantanal wetland, Mato Grosso do Sul State, Brazil

2011 ◽  
Vol 20 (1) ◽  
pp. 85-87 ◽  
Author(s):  
Santiago Benites de Pádua ◽  
Márcia Mayumi Ishikawa ◽  
Fabiana Satake ◽  
Gabriela Tomas Jerônimo ◽  
Fabiana Pilarski
Keyword(s):  
Prevalence Rate ◽  
First Record ◽  
Diagnostic Methods ◽  
Mato Grosso ◽  
First Report ◽  
Paraguay River ◽  
Blood Smears ◽  
Mato Grosso Do Sul ◽  
Pantanal Wetland ◽  
Blood Centrifugation

The blood infection by Trypanosoma sp. in tuvira (Gymnotus aff. inaequilabiatus) from the Pantanal wetland was reported in this study. Ten fish from the Paraguay River in the Pantanal were evaluated for the presence of hemoflagellates. Trypomastigotes of Trypanosoma sp. were observed in blood smears from three fish (30% prevalence) and some forms were seen to be undergoing division. Using the diagnostic methods of fresh examination and blood centrifugation in hematocrit capillary tubes, the prevalence rate was 80%. This is the first report of Trypanosoma sp. in tuvira in Brazil.

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