scholarly journals Invertebrates associated to Eichhornea azurea Kunth in a lagoon of the Upper Paraná River: composition, community attributes and influence of abiotic factors

2012 ◽  
Vol 23 (4) ◽  
pp. 376-385 ◽  
Author(s):  
Valéria Flávia Batista-Silva ◽  
Daiane Dias Boneto ◽  
Dayani Bailly ◽  
Milza Celi Fedatto Abelha ◽  
Elaine Antoniassi Luiz Kashiwaqui
Keyword(s):  
Dissolved Oxygen ◽  
Hydrological Cycle ◽  
Abiotic Factors ◽  
Principal Component ◽  
Paraná River ◽  
Mato Grosso ◽  
Rainy Period ◽  
Parana River ◽  
Eichhornia Azurea ◽  
Upper Paraná River

AIM: We evaluated the composition and community attributes of invertebrates associated to Eichhornia azurea at Cascalho Lagoon, Upper Paraná River, Mato Grosso do Sul State, Brazil, over a hydrological cycle, as well the possible influence of abiotic factors upon these attributes. METHODS: The samplings were conducted during 2010 in the rainy and dry periods at stands of E. azurea. The attributes evaluated were abundance, richness, diversity, evenness and dominance. The abiotic factors, temperature, dissolved oxygen, pH and turbidity were summarized by a Principal Component Analysis (PCA). In order to verify possible differences between the mean values of the community attributes and the scores of the PCA axis in different periods, we employed null models analysis of variance. The influence of abiotic factors on each attribute was evaluated through Pearson correlations. RESULTS: We captured 3,052 individuals, distributed into 32 taxa, belonging to the phyllum Mollusca, Annelida, Nematoda and Arthropoda. Among the assessed attributes, only abundance and richness varied significantly between periods, with higher values during the rainy period. Chironomidade was dominant in both periods, whereas Notonectidae and Cyclopoida were rare in the rainy, and Bivalve, Decapoda, Haliplidae, Trichoptera and Pyralidae, in the dry period. A temporal distinction was evident only for the PCA axis 1, which represented gradients in temperature, dissolved oxygen and pH. Among the community attributes, only abundance was significant and negatively correlated with this axis. CONCLUSION: We attested that: i) the rainy period should add favorable conditions for invertebrates' higher richness and abundance in this macrophyte; ii) only the later attribute was influenced by limnological gradients.

scholarly journals Fish larvae from the upper Paraná River: do abiotic factors affect larval density?

2008 ◽  
Vol 6 (4) ◽  
pp. 551-558 ◽  
Author(s):  
Gilmar Baumgartner ◽  
Keshiyu Nakatani ◽  
Luiz Carlos Gomes ◽  
Andréa Bialetzki ◽  
Paulo Vanderlei Sanches ◽  
...  
Keyword(s):  
Fish Larvae ◽  
Abiotic Factors ◽  
Larval Density ◽  
Principal Component ◽  
Paraná River ◽  
The Other ◽  
Parana River ◽  
Upper Paraná River ◽  
Iheringichthys Labrosus

The purpose of this study was to evaluate the role of abiotic factors on fish larvae occurrence. Samplings were carried out monthly at 12 stations (grouped in four areas) in the Amambaí, Ivaí and Paraná rivers and in the Itaipu Reservoir (upper Paraná River basin), from October 1994 to January 1995 (spawning season). Simultaneously, we obtained water temperature, pH, electrical conductivity, dissolved oxygen, water level, water velocity, and rainfall. Principal Component Analyses (PCA) and Detrended Correspondence Analyses (DCA) were applied to summarize abiotic and larvae density data, respectively. Amambaí River differed significantly from the other areas in relation to abiotic factors. Itaipu Reservoir differed significantly from the other areas considering species composition, and the Ivaí River also differed from the Paraná River. The relationship among PCA and DCA axes were significant, indicating that abiotic factors do influence larva. For example: Leporinus elongatus prefered the Amambaí River, Hypophthalmus edentatus, Plagioscion squamosissimus, and Hoplias aff. malabaricus the Itaipu Reservoir, and Pimelodus maculatus, Auchenipterus osteomystax and Iheringichthys labrosus the Ivaí River. We suggest that species selected some abiotic factors characteristic to a given environment as spawning grounds.

scholarly journals Effects of the hydrological regime on the ichthyofauna of riverine environments of the Upper Paraná River floodplain

2009 ◽  
Vol 69 (2 suppl) ◽  
pp. 669-680 ◽  
Author(s):  
R. Fernandes ◽  
AA. Agostinho ◽  
EA. Ferreira ◽  
CS. Pavanelli ◽  
HI. Suzuki ◽  
...  
Keyword(s):  
Species Richness ◽  
Fish Assemblage ◽  
Hydrological Cycle ◽  
Diversity Index ◽  
Principal Component ◽  
Paraná River ◽  
Analysis Of Covariance ◽  
Long Distance ◽  
Parana River ◽  
Upper Paraná River

In this work, spatial and temporal variations in the diversity (species richness and Simpson's Diversity Index) and abundance (indexed by the capture per unit effort - CPUE; total and for reproductive groups) of fish from three rivers (Baía, Ivinheima and Paraná) located in a floodplain of the Upper Paraná River basin were analyzed over a period of 20 years (1987-2007). In addition, we evaluated the relationships of these ecological attributes with variations in the hydrologic regime, considering the possible effects of natural (climatic events) and artificial (discharge control by dams) disturbances. Annual variations in hydrometric attributes were calculated using PULSO software and daily water level data. We applied analysis of covariance to determine the relationships between ecological and hydrometric attributes, the latter summarized in axes of a principal component analysis. Lower values of the fish assemblage attributes (diversity and abundance) were registered in the Paraná River. Species richness, total CPUE and CPUE of long-distance migratory species were positively related to the duration of the floods and the connectivity of the area. Variations in the annual hydrological cycle and their effects on fish assemblage appear to be affected by extreme natural (ENSO) and artificial (discharge control by dams) events.

scholarly journals Periphytic Cosmarium (Zygnematophyceae, Desmidiaceae) in lentic environments of the Upper Paraná River floodplain: Taxonomy and ecological aspects

2018 ◽  
Vol 30 (0) ◽  
Author(s):  
Nicolli Cristina Osório ◽  
Aparecida Miranda Polinario ◽  
Bárbara Dunck ◽  
Kisay Lorena Adame ◽  
Luciana Carapunarla ◽  
...  
Keyword(s):  
Paraná River ◽  
Taxonomic Study ◽  
Ecological Studies ◽  
River Floodplain ◽  
Parana River ◽  
Ecological Aspects ◽  
Eichhornia Azurea ◽  
Upper Paraná River Floodplain ◽  
Upper Paraná River ◽  
Paraná River Floodplain

Abstract Aim A taxonomic study of the species of the genus Cosmarium Corda ex Ralfs (Desmidiaceae) was conducted in two lentic environments of the Upper Paraná River Floodplain (Garças and Patos lakes). Methods The samples were collected in November 2016. Two petioles of Eichhornia azurea (Sw) Kunth were sampled and analyzed qualitatively. Results Six species, nine varieties, and three forms were identified, with five taxa being common to both lakes, nine in Garças Lake, and four in Patos Lake. Of this, thirteen species represent the first records for the floodplain environment. Conclusion This study contributes to the knowledge of the biodiversity of this region, providing support for future ecological studies and biomonitoring.

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.

scholarly journals Species inventory of aquatic macrophytes in the last undammed stretch of the Upper Paraná River, Brazil

2017 ◽  
Vol 29 (0) ◽  
Author(s):  
Douglas Costa Souza ◽  
Eduardo Ribeiro Cunha ◽  
Raytha de Assis Murillo ◽  
Márcio José Silveira ◽  
Mikaela Marques Pulzatto ◽  
...  
Keyword(s):  
Hydrilla Verticillata ◽  
Main Channel ◽  
Paraná River ◽  
Panicum Maximum ◽  
Species Accumulation Curves ◽  
Parana River ◽  
Frequent Species ◽  
Eichhornia Azurea ◽  
Macrophyte Species ◽  
Upper Paraná River

Abstract The last undammed stretch of the Upper Paraná River in the Brazilian territory is, to date, not completely inventoried, which rises concerns given the rapid rates of species extinctions. Aim Here, we provide an inventory of macrophyte taxa recorded in the last undammed 230 km stretch of the Upper Paraná River. Methods We inventoried macrophyte taxa in 27 sampling stations including lakes, the main channel of the river, and the tributary confluences in November 2013 and in May and November 2014. Macrophyte were sampled in littoral zones. We explored taxonomic and life form aspects of the recorded species. We used species accumulation curves and ordination techniques to summarize the variation in richness and composition of macrophyte species. Results We recorded 71 macrophyte taxa in 35 families. Most species were emergent, amphibian, free-floating, and rooted submerged. At the main channel of the Upper Paraná River, Eichhornia azurea, E. crassipes, and Paspalum repens represented the most frequent species. The most frequent species in the tributary confluences were Ludwigia sp., E. azurea, and Polygonum ferrugineum, while in lakes, Ludwigia sp., Oxycaryum cubense, and E. azurea were the most representative taxa. In regard to macrophyte composition, the invasive Hydrilla verticillata mostly influenced sites in the Upper Paraná River, in the ordination space, while floodplain lakes were mostly characterized by the presence of species such as Scleria melaleuca, Panicum maximum, and Thelypteris sp., among others. Conclusions Our study indicates that the last undammed stretch of the Upper Paraná River contains a large number of macrophyte species, suggesting that this stretch is an important area for the conservation of macrophyte species. In addition, the occurrence of invasive species (e.g., Hydrilla verticillata) within the investigated stretch deserves attention in terms of potential impacts for which management action may be necessary.

scholarly journals Effects of the interannual variations in the flood pulse mediated by hypoxia tolerance: the case of the fish assemblages in the upper Parana River floodplain

2013 ◽  
Vol 11 (2) ◽  
pp. 413-424 ◽  
Author(s):  
Ana Cristina Petry ◽  
Fabiane Abujanra ◽  
Luiz Carlos Gomes ◽  
Horacio Ferreira Julio Jr. ◽  
Angelo Antonio Agostinho
Keyword(s):  
Dissolved Oxygen ◽  
Fish Assemblages ◽  
High Water ◽  
Flood Pulse ◽  
Paraná River ◽  
Tropical Fish ◽  
Hypoxia Tolerance ◽  
Interannual Variations ◽  
Parana River ◽  
Upper Paraná River

The effects of the duration of the floods on abiotic variables and attributes of species tolerant and intolerant to hypoxia (STH and SIH respectively) were evaluated in rivers and lakes of the upper Paraná River. Fish were sampled once a year, in six sampling stations, during the high water period from 2000 to 2003. There were overall reductions in dissolved oxygen levels and increases in transparency of water in lakes in years of moderate floods. The duration of floods influenced species differentially based on their tolerance to hypoxia: in moderate floods, richness of STH increased and numerical abundance and biomass of SIH reduced significantly. Opposite relationships were detected between dissolved oxygen and the attributes of STH and SIH. Dissolved oxygen was the best predictor of variability of STH and SIH in years of moderate floods, whereas water transparency predicted significant amounts of STH in years of short floods. Being positively affected by dissolved oxygen reductions, STH seem to take advantages in persisting in seasonally harsh lentic habitats. The incorporation of abiotic data as well the differential tolerance of species to hypoxia would improve further investigations of the effects of interannual variations in the flood pulse on tropical fish assemblages

scholarly journals Second record of Leporinus tigrinus Borodin, 1929 (Characiformes: Anostomidae) in the Upper Paraná Riverbasin, Brazil

Check List ◽  
2013 ◽  
Vol 9 (6) ◽  
pp. 1543 ◽  
Author(s):  
Claudimar Jean dos Santos ◽  
Luiz Fernando Caserta Tencatt ◽  
Renata Rúbia Ota ◽  
Weferson Júnio da Graça
Keyword(s):  
River Basin ◽  
Field Studies ◽  
First Record ◽  
Paraná River ◽  
Mato Grosso ◽  
Parana River ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Mato Grosso Do Sul ◽  
Paraná River Basin

Herein we report the second record for Leporinus tigrinus in the Upper Paraná River basin, based on two specimens collected during field studies at Sucuriú River, Mato Grosso do Sul State and two specimens from Claro River, Goiás State. These records extend the species’ distribution in approximately 500 km southwards from the first record in Corumbá dam area, Goiás State. Moreover, we discuss whether the species is native in the Upper Paraná River basin.

Abiotic Factors Influencing Piranha Attacks on Netted Fish in the Upper Paraná River, Brazil

1997 ◽  
Vol 17 (3) ◽  
pp. 712-718 ◽  
Author(s):  
Carlos Sérgio Agostinho ◽  
Angelo Antonio Agostinho ◽  
Elineide Eugenio Marques ◽  
Luis Mauricio Bini
Keyword(s):  
Abiotic Factors ◽  
Paraná River ◽  
Parana River ◽  
Factors Influencing ◽  
Upper Paraná River
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