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.

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 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 The hummingbird community and their floral resources in an urban forest remnant in Brazil

2011 ◽  
Vol 71 (3) ◽  
pp. 611-622 ◽  
Author(s):  
LC. Rodrigues ◽  
AC. Araujo
Keyword(s):  
Urban Forest ◽  
Floral Resources ◽  
Mato Grosso ◽  
Mean Values ◽  
Nectar Volume ◽  
Forest Remnant ◽  
Flower Density ◽  
Unidentified Species ◽  
Temporal And Spatial ◽  
Mato Grosso Do Sul

The temporal and spatial resource use among hummingbirds was studied over 13 months in an urban forest remnant (Prosa State Park: PSP) in Campo Grande, Mato Grosso do Sul, Brazil. Hummingbird visitation was recorded at three ornithophilous and eleven non-ornithophilous species. Flower density was roughly constant during the study period, with the density of non-ornithophilous flowers being higher than that of ornithophilous ones. Mean values of nectar volume and concentration were similar between ornithophilous and non-ornithophilous species. Eight hummingbird species were observed at PSP: Amazilia fimbriata, Anthracothorax nigricollis, Chlorostilbon lucidus, Eupetomena macroura, Hylocharis chrysura, Florisuga fusca, Thalurania furcata and an unidentified species. Hummingbird visit frequencies to ornithophilous and non-ornithophilous flowers were similar. However, some non-ornithophilous species received a higher number of visits, which seems to be related to their large number of open flowers per plant per day. The number of feedings bouts of hummingbirds increased with the total number of flowers observed per focal plant. All recorded species of hummingbirds visited non-ornithophilous flowers, predominantly melittophilous and generalised entomophilous flowers. Hummingbird species recorded at PSP may be viewed as generalists, visiting a large number of non-ornithophilous species. Despite being an urban forest, PSP is relatively rich in hummingbird species, suggesting that it provides important shelter and foraging sites for hummingbirds in such an environment.

scholarly journals EVALUATION OF THE POTENTIAL OF SEED RAIN AS AN ALTERNATIVE FOR FOREST RESTORATION IN PERMANENT PRESERVATION AREAS1

2016 ◽  
Vol 40 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Emerson Pereira da Silva ◽  
Fabricio Gomes Figueiredo ◽  
Shaline Séfara Lopes Fernandes ◽  
Zefa Valdivina Pereira
Keyword(s):  
Forest Restoration ◽  
Diversity Index ◽  
Seed Rain ◽  
Forest Fragments ◽  
Monthly Basis ◽  
Mato Grosso ◽  
Evenness Index ◽  
Forest Remnants ◽  
Forested Areas ◽  
Mato Grosso Do Sul

ABSTRACT The ecological restoration of degraded areas using seeds collected in forest remnants has shown significant results. This study was developed to verify the potential of seed rain to regenerate forest fragments of a Permanent Preservation Area (PPA) in the Apa River Basin which is located in the southwestern portion of the Mato Grosso do Sul state, Brazil. To develop the study, we installed 25 collectors measuring 1 m2 each, which were systematically distributed on an area of 1.5ha. Seed gathering was conducted in a monthly basis throughout the year of 2013. A total of 26.411 propagules were identified and distributed among 50 species, 45 genera and 32 families. In terms of the propagules distribution, 70.51% were identified as trees, 22.8% as lianas, 6.5% as shrubs, 0.1 as herbaceous, 0.05% as palm and 0.05% could not be classified. The value for the Shannon Diversity Index was (H') = 1.67 and the Pielou Evenness index was (J) = 0.42. These results indicate that the seeds rain has low species diversity with the abundance of a few species. The overall results suggest that seed rain can be a potential technique for restoration of the PPAs and other forested areas. However, it is necessary to enhance the diversity of tree species.

scholarly journals Water Quality of a Stream Subject to the Release of Industrial Effluent in an Environmental Protected Area

2015 ◽  
Vol 8 (Ed.esp.) ◽  
pp. 9
Author(s):  
Wagner Correia ◽  
Ana Francisca Gomes da Silva ◽  
Valéria Flávia Batista-Silva ◽  
Dayani Bailly ◽  
Renata Ruaro ◽  
...  
Keyword(s):  
Water Quality ◽  
Industrial Effluent ◽  
Oxygen Demand ◽  
Upstream Site ◽  
Mato Grosso ◽  
Mean Values ◽  
Pollutant Load ◽  
Daily Discharge ◽  
Mato Grosso Do Sul

This study evaluated the water quality of the Peri-Poçu Stream, Upper Paraná River basin, which is subjected to the effects of daily discharge of industrial effluent. Water samples were collected in August, September, November and December, 2013, at three sites (discharge of the effluent, upstream and downstream). At these sites, we determined temperature, pH, electrical conductivity (EC), dissolved oxygen (DO), biochemical oxygen demand (BOD) and flow (Q). The pollutant load was estimated at each site to assess the role of the effluent as a polluter. From the ordination generated by the Principal Components Analysis we observed a clear spatial distinction, with the sites of discharge and downstream distinguished from the upstream site by the highest EC, BOD and pH, and by the lowest values of DO and Q. The mean values of the pollutant load were significantly different between sites, with the highest value found at the site of effluent discharge. The results highlight the need for efforts to better manage of water resources in the Mato Grosso do Sul State, especially those located in protected areas as is the case of the Peri-Poçu Stream in order to reduce costs to combat water pollution a and conserve natural resources. Qualidade da Água de um Córrego Sujeito a Descarga de Efluente Industrial em uma Área de Proteção Ambiental Este estudo avaliou a qualidade da água do córrego Peri-Poçu, bacia do alto rio Paraná, o qual está sujeito aos efeitos do despejo diário de efluente industrial. Amostras de água foram obtidas em agosto, setembro, novembro e dezembro/2012, em três pontos (descarga do efluente, montante e jusante). Foram determinados para os diferentes pontos: temperatura, pH, condutividade elétrica oxigênio dissolvido, demanda bioquímica de oxigênio e vazão. Para avaliar a contribuição do efluente como agente poluidor foi estimada a carga poluidora em cada ponto. A partir da ordenação gerada pela Análise de Componentes Principais observou-se nítida distinção espacial, com os pontos de descarga e jusante separarando-se do ponto montante pelos maiores valores de condutividade elétrica, demanda bioquímica de oxigênio e pH e pelos menores valores de oxigênio dissolvido e vazão. Os valores médios da carga poluidora diferiram significativamente entre os pontos, com o maior valor registrado no ponto de descarga do efluente. Os resultados evidenciam a necessidade de esforços para melhor gerenciamento dos recursos hídricos no estado do Mato Grosso do Sul, especialmente daqueles situados em unidades de conservação como é o caso do córrego Peri-Poçu, a fim de diminuir os custos de combate à poluição das águas e conservar os recursos naturais existentes. PALAVRAS-CHAVE: Recursos Hídricos; Parâmetros Físico-Químicos; Impactos Ambientais; Monitoramento.

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 Propagation of Aloysia citriodora Palau Using Different Cutting Types under Light Intensity

2020 ◽  
pp. 1-9
Author(s):  
Orivaldo Benedito da Silva ◽  
Ademir Goelzer ◽  
Cleberton Correia Santos ◽  
Elissandra Pacito Torales ◽  
Néstor Antonio Heredia Zárate ◽  
...  
Keyword(s):  
Light Intensity ◽  
Vegetative Propagation ◽  
Block Design ◽  
Survival Rates ◽  
Dry Mass ◽  
Light Conditions ◽  
Fresh Weight ◽  
Mato Grosso ◽  
Randomized Complete Block Design ◽  
Mato Grosso Do Sul

Aims: The aim of this study was to evaluate the effect of types of cuttings and light intensity on cidró vegetative propagation. Place and Duration of Study: Medicinal Plants Garden, Federal University of Grande Dourados (UFGD), Dourados, state of Mato Grosso do Sul, Brazil, September to November 2016. Methodology: The experiment was carried out under two light conditions (shaded and full light), evaluating three types of cuttings (softwood, semi-hardwood and hardwood). Experimental design was a 2 x 3 factorial randomized complete block design (RCBD) with four replications. Results: Hardwood cuttings showed the highest survival rates (86% and 82%), regardless of light. Highest fresh weight (0.6062 g plant-1) and dry mass (0.2987 g plant-1) with a leaf of 44.57 cm2 were from hardwood cuttings, regardless of the light, while the longest root length were those of softwood cuttings under full light. Physiological indices varied as a function of light intensity, The highest values of leaf area ratio (46.11 cm2 g-1) and specific leaf mass (0.0037 g cm-2) occurred in cuttings under full light. Conclusion: The vegetative propagation of cidró can be carried out using the hardwood portion of the cutting branch, under full light.

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 Length-weight relationship for two species of fish from Upper Paraguay Basin in Mato Grosso do Sul, Brazil

2020 ◽  
pp. e748
Author(s):  
Thais Aparecida Soinski ◽  
Matheus Souza Costa ◽  
Eduardo Meneguzzi Brambilla ◽  
Welber Senteio Smith
Keyword(s):  
Fish Species ◽  
Well Being ◽  
Biological Information ◽  
Basic Information ◽  
Sample Number ◽  
Mato Grosso ◽  
Quantitative Indicator ◽  
Length Relationship ◽  
Relationship Of ◽  
Mato Grosso Do Sul

The study of the weight-length relationship of a fish species can be used to address several aspects that involve the distinction of small taxonomic units, providing basic information for the study of species biology, in addition, this relationship can also be used as quantitative indicator of the degree of health or well-being of the species in the environment. The objective of this study was to present unpublished data on the weight-length relationship (LWRs) for two species of fish. The fish were sampled in the months of January and July 2017 and January 2018 in rivers belonging to the Upper Paraná and Upper Paraguay basin along the MS-163, collected through sieves and trawls. 49 individuals were captured, distributed in two orders and two families, being 31 from Hisonotus francirochai and 18 from Roeboides descalvadensis. The results showed that the two species are within the expected for both parameters (a and b), even with a relatively low sample number. In addition, the data this study contribute with biological information for the species studied in this work.

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