scholarly journals Size and dry weight of main zooplankton species in Bariri reservoir (SP, Brazil)

2008 ◽  
Vol 68 (1) ◽  
pp. 69-75 ◽  
Author(s):  
EJ. González ◽  
Matsumura-Tundisi ◽  
JG. Tundisi
Keyword(s):  
Weight Distribution ◽  
Secondary Production ◽  
Dry Weight ◽  
Sao Paulo ◽  
Copepod Species ◽  
Zooplankton Species ◽  
Production Studies ◽  
Paulo State ◽  
Tietê River ◽  
São Paulo State

In order to generate a database for secondary production studies in the São Paulo State (Brazil) reservoirs, the size and dry weight of 13 zooplankton species from Bariri reservoir (middle Tietê River) were determined. Diameter and dry weight of eggs from some cladoceran and copepod species were also determined. Sizes varied from 108.6 mm (Keratella tropica) to 2488.6 µm (females of Argyrodiaptomus azevedoi), while dry weights varied between 0.025 µg (K. tropica) and 51.250 µg (females of A. azevedoi). Egg diameters varied between 75.0 µm (Mesocyclops ogunnus) and 171.8 µm (Ceriodaphnia silvestrii), while egg dry-weights varied between 0.074 µg (Acanthocyclops robustus) and 0.865 µg (Bosmina hagmanni). Size and dry weight distribution of the zooplanktonic organisms was not linear in the Bariri reservoir.

Metal and trace element assessments of bottom sediments from medium Tietê River basin, Sao Paulo State, Brazil: part II

2018 ◽  
Vol 316 (2) ◽  
pp. 805-818 ◽  
Author(s):  
D. I. T. Favaro ◽  
F. R. Rocha ◽  
M. Angelini ◽  
H. R. A Henriques ◽  
J. S. Soares ◽  
...  
Keyword(s):  
Trace Element ◽  
River Basin ◽  
Bottom Sediments ◽  
Sao Paulo ◽  
São Paulo ◽  
Paulo State ◽  
Tietê River ◽  
São Paulo State

scholarly journals First occurrence of Limnoperna fortunei (Dunker, 1857) in the Rio Tietê watershed (São Paulo State, Brazil)

2008 ◽  
Vol 68 (4 suppl) ◽  
pp. 1107-1114 ◽  
Author(s):  
DC. Pareschi ◽  
T. Matsumura-Tundisi ◽  
GR. Medeiros ◽  
AP. Luzia ◽  
JG. Tundisi
Keyword(s):  
Geographical Distribution ◽  
Food Chain ◽  
Sao Paulo ◽  
São Paulo ◽  
Limnoperna Fortunei ◽  
Paulo State ◽  
Tietê River ◽  
Ecological Implications ◽  
First Occurrence ◽  
São Paulo State

This paper describes the recent expansion of the geographical distribution of Limnoperna fortunei (Dunker, 1857) in the Tietê River watershed, São Paulo State, Brazil. Estimations related to the velocity of invasion and its causes are presented. Ecological implications related to biodiversity and possible changes in the food chain are discussed.

scholarly journals MUTAGENESIS IN Tradescantia pallida AS A BIOMARKER OF THE EFFECTS OF WATER POLLUTED WITH URBAN EFFLUENT

2014 ◽  
Vol 14 (1) ◽  
pp. 97 ◽  
Author(s):  
Ana Lúzia de Souza Araújo ◽  
Eliane Tigre Guimarães ◽  
Robson Seriani
Keyword(s):  
Positive Control ◽  
Negative Control ◽  
Sao Paulo ◽  
Distilled Water ◽  
Paulo State ◽  
Tietê River ◽  
Significant Difference ◽  
Tradescantia Pallida ◽  
São Paulo State ◽  
Urban Effluent

The present paper evaluated the toxicity of effluent released into the Tiete River, in Barra Bonita City, São Paulo State, using the test micronucleus with Tradescantia pallida. Young inflorescences of T. pallida (n = 20) were partially immersed in one of three treatments: water containing effluent, a positive control (0.1% formaldehyde), and a negative control (distilled water). The results showed a statistically significant difference (p < 0.05) between groups, indicating the genotoxicity of the effluent.

scholarly journals Infection levels of Austrodiplostomum compactum (Digenea, Diplostomidae) metacercariae in Plagioscion squamosissimus (Teleostei, Sciaenidae) from the Nova Avanhandava reservoir, São Paulo State, Brazil

2009 ◽  
Vol 84 (3) ◽  
pp. 284-291 ◽  
Author(s):  
J.V.K. Paes ◽  
E.D. Carvalho ◽  
R.J. da Silva
Keyword(s):  
Condition Factor ◽  
Parasitic Infection ◽  
Sao Paulo ◽  
São Paulo ◽  
Intensity Of Infection ◽  
Paulo State ◽  
Tietê River ◽  
Relative Condition Factor ◽  
High Prevalence ◽  
São Paulo State

AbstractThis study was aimed at evaluating the infection levels of Austrodiplostomum compactum metacercariae in 378 specimens of Plagioscion squamosissimus (‘corvina’ or ‘pescada branca’) from the Nova Avanhandava reservoir, low Tietê River, São Paulo State, Brazil. High prevalence, mean intensity of infection and abundance were observed in P. squamosissimus during most of the study, with the exception of March 2004. The relative condition factor (Kn) did not differ between parasitized and non-parasitized fish. A statistically significant positive correlation was observed between host standard length and intensity of infection. The analysis of biotic and abiotic variables showed that no abiotic variable correlated with parasitic infection levels. Moreover, P. squamosissimus status was demonstrated to be unaffected by A. compactum metacercariae infection.

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