scholarly journals Cryptic species of the genus Pimelodella (Siluriformes: Heptapteridae) from the Miranda River, Paraguay River basin, Pantanal of Mato Grosso do Sul, Central Brazil

2013 ◽  
Vol 11 (1) ◽  
pp. 101-109 ◽  
Author(s):  
Lenice Souza-Shibatta ◽  
Larissa Forim Pezenti ◽  
Dhiego Gomes Ferreira ◽  
Fernanda Simões de Almeida ◽  
Silvia Helena Sofia ◽  
...  
Keyword(s):  
Cryptic Species ◽  
Fish Diversity ◽  
Morphometric Characters ◽  
Mato Grosso ◽  
Central Brazil ◽  
Paraguay River ◽  
State Present ◽  
Adipose Fin ◽  
The One ◽  
Mato Grosso Do Sul

Specimens of Pimelodellacaptured in the Miranda River, Pantanal of Mato Grosso do Sul State, present morphological features that could indicate at least four species. Therefore, karyotype analysis and molecular biology provided evidence that they were only two species, one showing 2n = 46, and the other, 2n = 52 chromosomes, with only 18% genetic similarity. The morphological analysis evidenced that the dorsal filament is a male characteristic and that the upper lobe of the caudal fin was variable and might or might not be elongated in both species. With respect to morphometric characters, the formation of two groups was evident, but with a small overlap of specimens between them. Among the species with filaments on the dorsal fin observed in the Pantanal, the one with the lesser length of adipose fin base is P. griffini, which corresponds to that with 2n = 46 chromosomes, whereas the species P. taenioptera has 2n = 52 chromosomes. Thus, the accurate detection of these cryptic taxonomic units was only possible with the use of various analysis techniques. Furthermore, it is worth noting that the identification of cryptic species is important for obtaining correct estimates of fish diversity in the Pantanal

scholarly journals Parasitological assessment in the hybrid surubim (Pseudoplatystoma reticulatum x P. corruscans), with uncommon occurrence of Monogenea parasites

2016 ◽  
Vol 25 (2) ◽  
pp. 179-186 ◽  
Author(s):  
Gabriela Tomas Jerônimo ◽  
Santiago Benites de Pádua ◽  
Arlene Sobrinho Ventura ◽  
Eduardo Luis Tavares Gonçalves ◽  
Márcia Mayumi Ishikawa ◽  
...  
Keyword(s):  
Management Practices ◽  
Cold Season ◽  
Parasite Fauna ◽  
Ichthyophthirius Multifiliis ◽  
Fish Farms ◽  
Mato Grosso ◽  
Central Brazil ◽  
Ecological Concern ◽  
Host Parasite ◽  
Mato Grosso Do Sul

Abstract This study evaluated the parasite fauna of farmed hybrid surubim (Pseudoplatystoma reticulatum x P. corruscans) and the host-parasite-environment relationship in two fish farms located in Mato Grosso do Sul, Central Brazil, South America. A total of 120 hybrids from two different farms, 60 in each season (30 in the hot and 30 in cold season) were examined during a year. Water quality was weekly measured to evaluate the interaction among environmental conditions and parasitism. Histopathology was used to observe the effects of the parasites and environment on the fish gills. The ciliate protozoan Ichthyophthirius multifiliis and the monogeneans (Ameloblastella sp., Amphocleithrium paraguayensis, Vancleaveus ciccinus, V. fungulus and V. janacauensis) were the most prevalent parasites detected in both seasons in both farms, with prevalence above 80%. It was stated that parasites did not cause important damage in the health status of the hybrid surubim. These results might be related to general good management practices and environmental quality implemented by the fish farmers. The presence of uncommon monogenean parasites to this hybrid compared to their parents causing an environmental and ecological concern is here discussed.

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 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.

scholarly journals Insecta, Hemiptera, Cicadidae, Quesada gigas (Olivier, 1790), Fidicina mannifera (Fabricius, 1803), Dorisiana viridis (Olivier, 1790) and Dorisiana drewseni (Stål, 1854): first records for the state of Mato Grosso do Sul, Brazil

Check List ◽  
2010 ◽  
Vol 6 (1) ◽  
pp. 192 ◽  
Author(s):  
Camila Aoki ◽  
Frederico Santos Lopes ◽  
Franco Leandro de Souza
Keyword(s):  
Present Note ◽  
The State ◽  
Mato Grosso ◽  
Central Brazil ◽  
First Time ◽  
Mato Grosso Do Sul

No information is given for the distribution of Cicadidae in the state of Mato Grosso do Sul, central Brazil. Thus, the present note reports the species Quesada gigas, Fidicina mannifera, Dorisiana viridis and D. drewseni for the first time in this state.

scholarly journals Corumbataia britskii (Siluriformes: Loricariidae: Hypoptopomatinae) a new species from the upper Rio Paraná basin, Mato Grosso do Sul, Central Brazil

Zootaxa ◽  
2007 ◽  
Vol 1386 (1) ◽  
pp. 59-68 ◽  
Author(s):  
KATIANE M. FERREIRA ◽  
ALEXANDRE C. RIBEIRO
Keyword(s):  
New Species ◽  
Mato Grosso ◽  
Central Brazil ◽  
Paraná Basin ◽  
Parana Basin ◽  
Mato Grosso Do Sul ◽  
A New Species

A new Hypoptopomatinae, Corumbataia britskii, is described based on specimens recently collected in a tributary of the upper Rio Paraná basin, Mato Grosso do Sul State, Brazil. Corumbataia britskii differs from its congeners by having a more depressed head profile (vs. a more rounded head profile in C. cuestae and C. tocantinensis), by having a more developed and conspicuous tuft of enlarged odontodes on the tip of the supraoccipital (vs. its reduced condition found in C. cuestae and C. tocantinensis), and by heaving a partially enclosed arrector fossae (vs. an almost completely enclosed arrector fossae in C. cuestae and C. tocantinensis).

scholarly journals Mollusca, Gastropoda, Succineidae, Omalonyx unguis (d’Orbigny, 1835): distribution extension and new records for Brazil

Check List ◽  
2011 ◽  
Vol 7 (4) ◽  
pp. 400 ◽  
Author(s):  
Daniel Coscarelli ◽  
Teofânia H. D. A. Vidigal
Keyword(s):  
Reproductive System ◽  
New Records ◽  
Comparative Morphology ◽  
Paraná River ◽  
Mato Grosso ◽  
Parana River ◽  
Paraguay River ◽  
Mato Grosso Do Sul

Omalonyx unguis was previously known to occur in Argentina, Paraguay and Uruguay. We report the first conclusive record of occurrence of this species in Brazil, based on specimens collected in three localities in the Paraguay River sub-basin (Mato Grosso do Sul state – Campo Grande and Miranda; Mato Grosso state – Poconé), and in the Brazilian margin of the Paraná River (Foz do Iguaçu, Paraná State). The species was identified by comparative morphology of the reproductive system, and a map that synthesizes the literature and reports new records is presented.

Exploration for natural enemies of the cassava mealybug, Phenacoccus manihoti (Homoptera: Pseudococcidae), in South America for the biological control of this introduced pest in Africa

1990 ◽  
Vol 80 (4) ◽  
pp. 417-425 ◽  
Author(s):  
B. Löhr ◽  
A.M. Varela ◽  
B. Santos
Keyword(s):  
Natural Enemies ◽  
Mass Rearing ◽  
Phenacoccus Manihoti ◽  
International Institute ◽  
Mato Grosso ◽  
Cassava Mealybug ◽  
Paraguay River ◽  
Introduced Pest ◽  
Mato Grosso Do Sul ◽  
Ibadan Nigeria

AbstractAreas in Argentina, Bolivia, Brazil and Paraguay were searched for the cassava mealybug, Phenacoccus manihoti Matile-Ferrero. The mealybug was located in the Paraguay River basin in the Santa Cruz de la Sierra area of eastern Bolivia, the Mato Grosso do Sul state in South-Western Brazil and in Paraguay east of the Paraguay River. Mealybug populations were extremely low in all areas but there was a period of increase from August to December. Eighteen species of natural enemies were found attacking P. manihoti: the most abundant and also most important were a solitary, internal parasitoid, Epidinocarsis lopezi (DeSantis) (Hymenoptera: Encyrtidae), Hyperaspis notata Mulsant and Diomus spp. (Coleoptera: Coccinellidae), and Ocyptamus spp. (Diptera: Syrphidae). Collections of a closely related mealybug, Phenacoccus herreni Cox & Williams yielded two additional encyrtid parasitoids, Epidinocarsis diversicornis (Howard) and Aenasius sp. nr vexans Kerrich, but they did not survive on P. manihoti. Four parasitoids (E. lopezi, E. diversicornis, Parapyrus manihoti Noyes and Allotropa sp.) and four predators (H. notata, Diomus sp., Sympherobius maculipennis Kimmins, and Exochomus sp.) were sent for quarantine. With the exception of Parapyrus manihoti, all mentioned natural enemy species were forwarded to the International Institute of Tropical Agriculture at Ibadan, Nigeria for mass rearing and subsequent release.

scholarly journals Injuries caused by the venomous catfish pintado and cachara (Pseudoplatystoma genus) in fishermen of the Pantanal region in Brazil

2016 ◽  
Vol 88 (3) ◽  
pp. 1531-1537 ◽  
Author(s):  
GIULIANO N.R. DE AQUINO ◽  
CELSO C. DE SOUZA ◽  
VIDAL HADDAD JUNIOR ◽  
JOSÉ SABINO
Keyword(s):  
First Aid ◽  
Fishing Activity ◽  
Mato Grosso ◽  
Level Of Education ◽  
Paraguay River ◽  
Secondary Infections ◽  
Striped Catfish ◽  
Local Necrosis ◽  
Mato Grosso Do Sul ◽  
Venomous Fish

ABSTRACT INTRODUCTION: the fishing activity throughout the Upper Paraguay River Basin has huge financial and biological importance. This retrospective study investigated the occurrence of injuries caused by fish of the Pseudoplatystoma genus (spotted catfish or pintado and striped catfish or cachara) in professional fishermen of the Pantanal of Mato Grosso do Sul State. METHODS: we collected information through a questionnaire, showing that fishing is carried out by workers with low level of education, mainly adults or seniors with low financial gains. RESULTS: in Miranda town, 126 of 315 fishermen were interviewed and 38 individuals reported injuries (30.16%). In Corumbá town, 355 of 627 fishermen were interviewed, and 111 (56,61%) reported injuries. The lacerated lesions were the most common, associate with edema, erythema, radiating pain to the root of the limb, paresthesias and local necrosis. More rarely, they reported the occurrence of fever, cardiac arrhythmias and cold sweating. These manifestations may be associated with late secondary infections or envenomations caused by the toxins in the stingers of the fish. Many questionable and inappropriate treatments are used, sometimes aggravating the injuries. CONCLUSIONS: the freshwater professional fishermen need guidance on first aid measures and prevention of accidents caused by these venomous fish.

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.

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