FAUNA HELMÍNTICA DE PECES DE ALTA PLANICIE DEL RÍO PARANÁ, BRASIL

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Ricardo Massato Takemoto ◽  
Maria de los Angeles Perez Lizama
Keyword(s):  
River Estuary ◽  
Paraná River ◽  
Mato Grosso ◽  
La Plata ◽  
Parana River ◽  
Side Channels ◽  
South Central ◽  
Environmental Protection Area ◽  
Protection Area ◽  
Del Rio

The Paraná River is formed by junction of the Grande and Paranaíba Rivers and is the principal river of the La Plata basin. From source to mouth in the La Plata River estuary, the Paraná River flows for approximately 4,695 km (Petri & Fúlfaro, 1985) and drains most of South-Central South America. There are several dams in the main channel and tributaries of the Paraná River, but a floodplain still remains with a complex of tributaries, side channels, lakes, and marginal dikes (Stevaux, 1994; Souza Filho, 2009). This floodplain extends to the States of Paraná and Mato Grosso do Sul, encompassing areas of the Ilha Grande National Park, the Ivinheima State Park and the Environmental Protection Area (APA) of the islands and floodplain of the Paraná River

scholarly journals Conservation status of Astyanax biotae (Characiformes: Characidae) in Mato Grosso do Sul, upper Paraná River basin, Brazil

Biotemas ◽  
2018 ◽  
Vol 31 (4) ◽  
pp. 47-56 ◽  
Author(s):  
Maria José Alencar Vilela ◽  
Francisco Severo-Neto ◽  
Fernando Rogério Carvalho
Keyword(s):  
River Basin ◽  
Conservation Status ◽  
Paraná River ◽  
Mato Grosso ◽  
Parana River ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Mato Grosso Do Sul ◽  
Paraná River Basin

Astyanax biotae é uma espécie originalmente descrita em um afluente do Rio Paranapanema, bacia do alto Paraná. Durante amostragens realizadas em drenagens dos rios Ivinhema e Verde, no sistema do alto Paraná, em Mato Grosso do Sul, exemplares de A. biotae foram coletados em cabeceiras de pequenos riachos e em lagoas de várzea, tanto em Unidades de Conservação como em áreas de agricultura intensiva. Os dados morfomerísticos de 20 indivíduos analisados foram similares aos da série-tipo. Exemplares testemunhos estão depositados nas coleções ictiológicas da UFMS (ZUFMS), UEMS (CPUEMS) e UNESP (DZSJRP). Com base nos critérios da IUCN, sugerimos sua classificação como Menos Preocupante (LC) no estado de Mato Grosso do Sul, considerando principalmente a inexistência de ameaças efetivas em duas das áreas de ocorrência da espécie, situadas dentro de Unidades de Conservação. No entanto, reforçamos a urgência em medidas para a proteção das regiões de cabeceiras de riachos, a fim de evitar o aumento do desmatamento, assoreamento e poluição agrícola, problemas recorrentes no Cerrado, que comprometem severamente a manutenção desses hábitats e suas espécies. É necessário investir em estudos sobre a biologia da espécie e ampliar as amostragens, buscando diminuir os vazios amostrais ainda existentes nas drenagens estaduais.

Geographic distribution of the short-tailed river stingray (Potamotrygon brachyura): assessing habitat loss and fishing as threats to the world’s largest obligate freshwater elasmobranch

2016 ◽  
Vol 67 (10) ◽  
pp. 1463 ◽  
Author(s):  
Luis O. Lucifora ◽  
Santiago A. Barbini ◽  
Sabina Llamazares Vegh ◽  
Pablo A. Scarabotti ◽  
Facundo Vargas ◽  
...  
Keyword(s):  
Water Temperature ◽  
Geographic Distribution ◽  
River Basins ◽  
Paraná River ◽  
Habitat Modification ◽  
Rio De La Plata ◽  
Fishing Pressure ◽  
Río De La Plata ◽  
La Plata ◽  
Parana River

Freshwater elasmobranchs are threatened but little is known about them. Potamotrygon brachyura is the world’s largest obligate freshwater elasmobranch. This makes it popular among fishermen and suggests a susceptibility to anthropogenic threats. We collected records of P. brachyura (n=70) from media, fishermen and scientific sampling, to estimate its global geographic distribution (using both generalised additive and MaxLike models). Then, we estimated the species’ exposure to habitat modification and fishing pressure, by applying multinomial ordinal models with threat levels as response and the presence or absence of P. brachyura as an independent variable. Distance to coast, depth, water temperature range, salinity range and mean water temperature were the main determinants of the distribution in the Río de la Plata. This resulted in a narrow coastal distribution. In the Uruguay and Paraná River basins, the probability of occurrence was positively associated with flow accumulation, percentage of open water and submerged vegetation, and lowland ecoregions, and negatively to wetness index and altitude. This limited the distribution to large lowland rivers. Approximately 41% of the range of P. brachyura in the Río de la Plata was subject to high habitat modification. In the Uruguay and Paraná River basins, this percentage reached 7%; however, the overlap with high fishing pressure was 59%. For conservation purposes, P. brachyura may function as an umbrella species.

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.

scholarly journals Los guaraní y su orientación en el espacio

2016 ◽  
pp. 191
Author(s):  
Angélica Otazú
Keyword(s):  
Rio De La Plata ◽  
Río De La Plata ◽  
Mato Grosso ◽  
La Selva ◽  
La Plata ◽  
Del Rio ◽  
Mato Grosso Do Sul ◽  
La Luna

El presente trabajo pretende abordar la experiencia de los guaraní-kaiowá referente a su orientación en la selva y señalar, brevemente, algunas similitudes con los datos recopilados por los misioneros que entraron en contacto con los guaraní durante la colonia, especialmente, los de la Compañía de Jesús, quienes registraron importantes informaciones sobre la cultura guaraní, incluidas la fauna y la flora del Río de la Plata, entre otras regiones. La convivencia con la naturaleza les ha facilitado a los nativos orientarse, convenientemente, en el medio que le rodea, el bosque. Según los relatos de los kaiowá, durante siglos han logrado desenvolverse en perfecta armonía con la naturaleza y podrían desplazarse libremente, sea para cazar animales o recolectar frutas silvestres, de esta manera, atravesaban vastos territorios sin barrera alguna, muy diferente a la situación actual de muchos nativos tanto del Mato Grosso do Sul como los de Paraguay. La dinámica del viento, yvytu les permitía orientarse en medio de la selva; yvytu oipejuveha koty, el viento dominante, el otro medio infalible de orientación es el sol, kuarahy pyti’a, kuarahy sẽmba, oriente; kuarahy reike, poniente. Para circular por el monte dejaban trazos, cortando ramas de las plantas de modo que sirvan de señalización para volver a la casa. Habilidades que la sociedad, considerada moderna, no lo comprende o simplemente, desconoce. La orientación y habilidad, incomparables, que poseen los nativos nos invita a considerar la riqueza natural que ellos custodian y que están en permanente lucha para frenar la deforestación. Los habitantes más antiguos de estas zonas priorizaban el uso equilibrado de los recursos naturales. Por ejemplo, para sembrar y cosechar poseían un calendario lunar. Lógicamente, la división del tiempo, ára se basa en las fases de la luna, jasy ra’y, luna nueva; jasy renyhẽ, luna llena.

scholarly journals Spatial and temporal distribution of the zoobenthos community during the filling up period of Porto Primavera Reservoir (Paraná River, Brazil)

2009 ◽  
Vol 69 (1) ◽  
pp. 19-29 ◽  
Author(s):  
A. Jorcin ◽  
MG. Nogueira ◽  
R. Belmont
Keyword(s):  
Hydroelectric Power Plant ◽  
Mean Value ◽  
Sao Paulo ◽  
Paraná River ◽  
Second Phase ◽  
São Paulo ◽  
Hydroelectric Power ◽  
Mato Grosso ◽  
Parana River ◽  
Energy Company

This study is part of the limnological monitoring undertaken by the Energy Company of the State of São Paulo (CESP) during the filling up process of the Porto Primavera Reservoir (Hydroelectric Power Plant Engenheiro Sérgio Motta). This reservoir, located in the high Paraná River between the States of São Paulo and Mato Grosso do Sul, is the fourth largest in the country. The first filling up phase started in December 1998 and the second phase in March 2001. Samples for benthic community and sediment characteristics analysis were quarterly collected between August of 1999 and November 2001 and also in August of 2002 (11 sampling campaigns). Samplings were carried out at 13 stations distributed in the reservoir, and at one point located downstream of the dam. 128 invertebrate taxa were identified, being Mollusca, Annelida, Insecta and Nematoda the dominant groups during almost the whole study period. Insecta was the best represented class (9 different orders), and Diptera contributed with higher number of taxa, 63. The exotic species of bivalve Corbicula fluminea was recorded in all sampling stations showing its great capacity to colonize new habitats in the neotropical region. Noticeable variations in the fauna density were observed, considering both different periods and locations. The maximum density of organisms (mean value of 7812 ind.m-2) was recorded in the center of the reservoir, and the minimum (mean value 9 ind.m-2) in the more lacustrine area near the dam. The greatest species richness per sample (24 taxa) was observed in the reservoir upstream (fluvial zone). The maximum diversity (Shannon-Wiener Index) per station/period, 3.82 and 3.86 bits.ind-1, were calculated in the transitional river/reservoir zone during the beginning (August 1999) and in the reservoir central zones in the end (August 2002) of the filling up period, respectively. There was no clear relation between the distribution of the different faunistic groups and the sediment granulometric characteristics. However, the decrease or even total absence of organisms was observed at stations with high organic matter concentration (>40%) in a low degradation state (coarse detritus). This fact may be related to the lack of sediment deposits, which would cause difficulties to the fixation of the benthic fauna. Additionally, in those conditions more reduced chemical conditions are expected in function of the intense decomposition process of the flooded vegetation.

scholarly journals Long-term trends of fishery landings and target fish populations in the lower La Plata basin

2021 ◽  
Vol 19 (3) ◽  
Author(s):  
Pablo A. Scarabotti ◽  
Luis O. Lucifora ◽  
Luis A. Espínola ◽  
Ana P. Rabuffetti ◽  
Jorge Liotta ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Ecosystem Approach ◽  
Paraná River ◽  
Population Trends ◽  
Fish Populations ◽  
Data Sets ◽  
La Plata ◽  
Parana River ◽  
La Plata Basin ◽  
Target Fish

Abstract The La Plata basin is the second largest basin of South America and has supported important river fisheries for more than a century. In this paper, we evaluate for the first time the historical trends of landings of 21 fish taxa and the recent population trends of 27 species of commercial fishes in the lower La Plata basin (Argentina). We compiled three kinds of data sets: Total fishery landings (between 1934 and 1986) and exports (1994‒2019), fisheries monitoring programs of Chaco and Santa Fe provinces in the Paraná River (2009‒2019), and surveys of fish populations in the Upper (Corrientes, 1993‒2020) and Middle (EBIPES, 2005‒2020) Paraná River. The analysis of the historical landings showed more species declining in the lower portion of the basin than in the upper basin. Regarding recent population trends, Pimelodus spp., Hoplias spp., Salminus brasiliensis, Luciopimelodus pati, and Ageneiosus spp. declined in more than one region, while Megaleporinus spp., Pterodoras granulosus, and Oxydoras kneri showed stable to positive trends, with the other species varying in their trends between regions. These tendencies could be associated to a combination of factors such as overfishing and environmental changes that would require an ecosystem approach for their adequate management.

Sign in / Sign up

Export Citation Format

Share Document