scholarly journals Histopatologia de fígado, rim e baço de piaractus mesopotamicus, prochilodus lineatus e pseudoplatystoma fasciatum parasitados por myxosporídios, capturados no Rio Aquidauana, Mato Grosso do Sul, Brasil

2008 ◽  
Vol 17 (4) ◽  
pp. 200-205 ◽  
Author(s):  
Cristiane M. de Campos ◽  
Julieta R. E. de Moraes ◽  
Flávio R. de Moraes
Keyword(s):  
Mato Grosso ◽  
Prochilodus Lineatus ◽  
Piaractus Mesopotamicus ◽  
Mato Grosso Do Sul

Este estudo descreveu a histopatologia de rim, baço e fígado de Piaractus mesopotamicus, Prochilodus lineatus e Pseudoplatystoma fasciatum, parasitados por mixosporídios, capturados no Rio Aquidauana, MS. Após necropsia, amostras do fígado, rim cefálico e baço foram colhidas, fixadas em formalina a 10 % tamponada e processadas de acordo com a rotina histológica. Os cortes foram feitos à espessura de 5 μm e corados com hematoxilina-eosina. Foram encontrados Myxobolus porofilus em P. lineatus, M. colossomatis em P. mesopotamicus e Myxobolus spp. nas três espécies de hospedeiros. Cistos de mixosporídios no exame histopatológico foram vistos no fígado e baço de P. mesopotamicus. Mais de 50% das amostras de fígado de P mesopotamicus e P lineatus apresentou hepatodistrofia difusa. Mais de 80 % das amostras de fígado de P. fasciatum apresentou formações hialinas concêntricas e esteatose em 50% das amostras. Em 95,23 % das amostras de rins de P. mesopotamicus, foram observadas alterações teciduais, e em mais de 60 % dos casos nefrodistrofia difusa moderada e congestão de sinusóides glomerulares. Alterações teciduais nas amostras de rins de P. lineatus foram observadas em menos de 20 % da amostra. No baço dos peixes ora examinados não foram encontradas lesões dignas de relato.

scholarly journals Histopathology of gills of Piaractus mesopotamicus (Holmberg, 1887) and Prochilodus lineatus (Valenciennes, 1836) infested by monogenean and myxosporea, caugth in Aquidauana River, State of Mato Grosso do Sul, Brazil

2011 ◽  
Vol 20 (1) ◽  
pp. 67-70 ◽  
Author(s):  
Cristiane Meldau de Campos ◽  
Julieta Rondini Engrácia de Moraes ◽  
Flávio Ruas de Moraes
Keyword(s):  
Histological Analysis ◽  
Developmental Stages ◽  
Inflammatory Cells ◽  
Focal Points ◽  
Mato Grosso ◽  
Prochilodus Lineatus ◽  
Piaractus Mesopotamicus ◽  
Secondary Lamellae ◽  
Routine Procedures ◽  
Mato Grosso Do Sul

A histological analysis was conducted on the gills of 15 Piaractus mesopotamicus and 19 Prochilodus lineatus specimens collected between April and November 2004 from the Aquidauana River, State of Mato Grosso do Sul, Central-West Brazil, to describe the anatomopathological characteristics of the gills of these freshwater fish. Gill samples were fixated in 10% buffered formalin and processed following histological routine procedures. The histological examination of the gills of P. mesopotamicus revealed intralamellar monogenean and mixosporean cysts of Henneguya piaractus at several developmental stages over the entire (basal, median and distal) lamella. Intraepithelial cysts caused lamella dilation and deformity of adjacent lamellae. In P. lineatus gills, monogenean cysts were detected. In both host species, hyperplasia of the gill epithelium and structural disorganization of secondary lamellae was seen diffusely in the gills, leading to fused lamellae in the gills. In few cases, there was found mononuclear inflammatory cells and hemorrhagic focal points distally in the lamellae.

scholarly journals Hook selectivity of the pacu Piaractus mesopotamicus (Holmberg, 1887) in the Pantanal, the state of Mato Grosso do Sul, Brazil

2007 ◽  
Vol 67 (2) ◽  
pp. 339-345 ◽  
Author(s):  
J. Peixer ◽  
M. Petrere Jr.
Keyword(s):  
Maximum Sustainable Yield ◽  
Recreational Fishing ◽  
Sustainable Yield ◽  
Mato Grosso ◽  
Piaractus Mesopotamicus ◽  
Total Length ◽  
Kolmogorov Smirnov ◽  
And Behavior ◽  
Mato Grosso Do Sul ◽  
Smirnov Test

The Pacu Piaractus mesopotamicus is the most captured fish species in the Pantanal, Mato Grosso do Sul State, and since 1994, its maximum sustainable yield had already been exceeded. Its capture is carried out only by hooks, as mesh gears are forbidden either for professional or for recreational fishing. The aim of this study was to determine selectivity for different hook sizes used in P. mesopotamicus fishing and to verify which sizes capture only adults. Data were collected in the rivers Miranda, Aquidauana, and Vermelho, in January, March, and April 2002. Six longlines with eight hook sizes were used and we adopted the hook opening as a measure related to selectivity. Different hooks captured individuals of the same length and their medians were similar, evidencing the great overlap among sizes. Regression results showed no significant relationship between ln[c2 (l)/c1 (l)] and total length of captured individuals. In addition, the Kolmogorov-Smirnov test also did not detect significant differences in the size of captured fish. Several hypotheses, such as the selectivity models, shape of selection curves, scarcity of large fishes, and behavior are used in order to explain the absence of hook selectivity for this species. Size of recruitment for this gear was 28 cm of total length, when individuals are still immature.

scholarly journals Ecology of the parasitic endohelminth community of Piaractus mesopotamicus (Holmberg, 1887) (Characiformes) from Aquidauana and Miranda Rivers, Pantanal, state of Mato Grosso do Sul, Brazil

2009 ◽  
Vol 69 (1) ◽  
pp. 87-91 ◽  
Author(s):  
CM. Campos ◽  
RM. Takemoto ◽  
VE. Fonseca ◽  
FR. Moraes
Keyword(s):  
Significant Positive Correlation ◽  
The State ◽  
Mato Grosso ◽  
Piaractus Mesopotamicus ◽  
Positive Correlation ◽  
Total Length ◽  
Mato Grosso Do Sul

In this study the structure and diversity of the endohelminth community, as well as its interactions with 73 specimens of Piaractus mesopotamicus are described. The fish were caught in Aquidauana and Miranda rivers, both located in the Pantantal region, in the state of Mato Grosso do Sul. A total of 608,788 specimens of helminthes were found, representing five species: Dadaytrema oxycephala, Chabaudinema americanum, Spectatus spectatus, Rondonia rondoni and Echinorhynchus jucundum. D. oxycephala was more prevalent (91.78%) followed by R. rondoni (73.97%). Simpson's index indicated dominance in the endohelminth infracommunities (C = 0.396) and D. oxycephala was considered central species. A total of 54 hosts had between 2 and 3 species of helminthes. The pairs of the species R. rondoni/D. oxycephala and S. spectatus/D. oxycephala showed significant positive correlation between abundances. There was a significant positive correlation between total length and abundance of S. spectatus (rs = -0.2467 and p = 0.0353). Abundance of R. rondoni between the periods of 1/2003 and 2/2003 (p = 0.0356) and 1/2003 and 4/2004 (p = 0.0009) was significantly different. There was significant prevalence of E. jucundum in the female hosts.

scholarly journals TEORES DE COLESTEROL E LIPÍDIOS TOTAIS EM SEIS ESPÉCIES DE PEIXES CAPTURADOS NA REGIÃO PANTANEIRA DO ESTADO DE MATO GROSSO DO SUL

2002 ◽  
Vol 20 (1) ◽  
Author(s):  
PRISCILA AIKO HIANE ◽  
ADMAR FERREIRA LEAL FILHO ◽  
MANOEL MENDES RAMOS FILHO ◽  
MARIA ISABEL LIMA RAMOS
Keyword(s):  
Cholesterol Concentration ◽  
Muscular Tissue ◽  
Total Lipids ◽  
Mato Grosso ◽  
Piaractus Mesopotamicus ◽  
Lipid Source ◽  
Cholesterol Levels ◽  
Pygocentrus Nattereri ◽  
Mato Grosso Do Sul

O objetivo deste trabalho foi determinar os teores de colesterol e lipídios totais na porção comestível (tecido muscular) de seis espécies de peixes capturados na região pantaneira do Estado de Mato Grosso do Sul. As espécies estudadas foram o pacu ( Piaractus mesopotamicus), a piranha ( Pygocentrus nattereri), o dourado ( Salminus maxillosus), a piraputanga ( Brycon orbigynanus), o piauçu ( Leporinus macrocephalus) e o pintado ( Pseudoplatystoma coruscans). Usou-se o método colorimétrico de BOHAC et al. para determinação do colesterol e o da extração com solvente orgânico e gravimetria para lipídios totais. Quanto aos teores de lipídios totais, os valores médios obtidos para as seis espécies de peixes estudadas enquadraram-se na faixa de 1,0 a 6,7 g/100 g de tecido muscular dos peixes, sendo a menor concentração apresentada pelo pintado e a maior pela piraputanga. A concentração de colesterol, em mg/100 g de tecido muscular (base úmida), foi mais alta para o dourado (107,4 mg/100 g) e mais baixa para o pintado (51,5 mg/100 g). CHOLESTEROL LEVELS AND TOTAL LIPIDS IN SIX SPECIES OF FISH CAPTURED IN “PANTANAL” REGION OF MATO GROSSO DO SUL STATE Abstract The objective of this work was to determine the cholesterol and total lipids content in the edible portion (muscular tissue) of six species of fish, captured in the “Pantanal region of Mato Grosso do Sul State (Brazil). The studied species were the pacu ( Piaractus mesopotamicus), the piranha (Pygocentrus nattereri), the dourado ( Salminus maxillosus), the piraputanga ( Brycon orbigynanus), the piauçu ( Leporinus macrocephalus) and the pintado ( Pseudoplatystoma coruscans). The method for determination of cholesterol was the colorimetric of BOHAC et al. and for the total lipids was the extraction method with organic solvent and gravimetry. With relationship to the values of total lipids, the average content obtained for the six species of studied fish were in the range of 1,0 to 6,7 g/100 g of muscular tissue of the fish, and the pintado presented smaller concentration and the piraputanga was revealed as the largest lipid source. The cholesterol concentration, in mg/100 g of muscular tissue (raw base) was higher for the dourado (107,4 mg/100 g) and lower for the pintado (51,5 mg/100 g).

scholarly journals Yield per recruit of the pacu Piaractus mesopotamicus (Holmberg, 1887) in the pantanal of Mato Grosso do Sul, Brazil

2007 ◽  
Vol 67 (3) ◽  
pp. 561-567 ◽  
Author(s):  
J. Peixer ◽  
AC. Catella ◽  
M. Petrere Júnior
Keyword(s):  
Growth Parameters ◽  
Survival Rates ◽  
Monthly Basis ◽  
Mato Grosso ◽  
Mean Values ◽  
Piaractus Mesopotamicus ◽  
Length Relationship ◽  
Restrictive Measures ◽  
Yield Per Recruit ◽  
Mato Grosso Do Sul

Among the several fish species comercially exploited at the Pantanal of Mato Grosso do Sul, the "pacu" (Piaractus mesopotamicus) stands as one of the most important. Information regarding its exploitation level is necessary for the proper management of its stocks. Between 1996 and 1997 data on total length of the pacu were collected on a monthly basis from specimens caught by professional and sport fishers in the municipality of Corumbá. These data were used to estimate growth parameters and to assess the exploitation level for this species, applying the Beverton and Holt yield per recruit model. Length frequency analysis, carried out with the software FISAT (ELEFAN), was used to estimate growth parameters: 1996: L<FONT FACE=Symbol>¥</FONT> = 87.20 cm; K = 0.34 year-1; phi´=3.41; C = 0.74; WP = 0.81; Longevity = 8.40 years; and 1997: L<FONT FACE=Symbol>¥</FONT> = 86.50 cm; K = 0.34 year-1; phi´=3.40; C = 0.60; WP = 0.80; Longevity = 8.40 years. The value for t0is -0.363 years for mean values of L<FONT FACE=Symbol>¥</FONT> and k. The weight-length relationship, calculated from data derived from experimental fisheries carried out in 1999 and 2000, is described by the equation: W = 0.048LF2.835. Estimated mortalities and survival rates were: 1996: Z = 1.51 year-1; M = 0.62 year-1; F = 0.89 year-1; S = 21.9%; and 1997: Z = 1.65 year-1; M = 0.63 year-1; F = 1.02 year-1; S = 19.1%. The yield per recruit analysis showed the following values: F Present= 0.96 year-1; Fmax = 0.67 year-1 ; F0.1 = 0.51 year-1 (for Lc = 26.7 cm). These results suggest that the pacu is overexploited in the area, so that restrictive measures are in need to manage the pacu fisheries.

A Synopsis of Dicliptera (Acanthaceae) in Brazil, with the Description of Two New Species

2020 ◽  
Vol 45 (2) ◽  
pp. 340-348
Author(s):  
James Lucas da Costa-Lima ◽  
Earl Celestino de Oliveira Chagas
Keyword(s):  
New Species ◽  
South America ◽  
The State ◽  
Northeastern Brazil ◽  
Mato Grosso ◽  
The North ◽  
New Synonyms ◽  
Two New Species ◽  
Mato Grosso Do Sul ◽  
A New Species

Abstract—A synopsis of Dicliptera (Acanthaceae) for Brazil is presented. Six species are recognized: Dicliptera ciliaris, D. sexangularis, and D. squarrosa, widely distributed in South America; D. purpurascens, which ranges from the North Region of Brazil (in the state of Acre) to eastern Bolivia; D. gracilirama, a new species from the Atlantic Forest of northeastern Brazil; and D. granchaquenha, a new species recorded in dry and semideciduous forests in Bolivia and western Brazil, in the state of Mato Grosso do Sul. Furthermore, we propose new synonyms and designate lectotypes for eleven names. An identification key to the six accepted Dicliptera species in Brazil is provided.

LUGARES E NÃO LUGARES DO ESTÁGIO SUPERVISIONADO EM UNIVERSIDADES PÚBLICAS DE MATO GROSSO DO SUL: UEMS e UFGD Coleção Licenciaturas - Volume 1

2020 ◽  
Author(s):  
F. PERBONI ◽  
Carla Regina de Souza FIGUEIREDO ◽  
A. MARQUES ◽  
A. N. MILITÃO ◽  
C. N. JESUS ◽  
...  
Keyword(s):  
Mato Grosso ◽  
Mato Grosso Do Sul
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