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Freire C.A.,Federal University of Paraná | Souza-Bastos L.R.,Federal University of Paraná | Chiesse J.,Federal University of Paraná | Tincani F.H.,Federal University of Paraná | And 9 more authors.
Environmental Science and Pollution Research | Year: 2015

Iguaçu River is the second most polluted river of Brazil. It receives agrochemicals and contaminants of urban and industrial sources along its course. A multibiomarker approach was employed here to evaluate the health of a small characin (Astyanax spp.) at two sites along the river, sampled during a dry (autumn) and a rainy (spring) season. Biomarkers were condition factor and somatic indices (gonads and liver); genetic damage (comet assay and micronucleus test); enzyme activities such as hepatic catalase (CAT) and glutathione S-transferase (GST), lipoperoxidation (LPO), branchial and renal carbonic anhydrase (CA), acetylcholinesterase (AChE) in the muscle and the brain, histopathology of the liver and gills, and concentrations of polycyclic aromatic hydrocarbons (PAHs) in bile. There were no consistent differences in biomarker responses between the two study sites. Some biomarkers revealed greater potential impact in the rainy season, when increased amounts of contaminants are washed into the river (combined CAT inhibition and LPO increase, CA upregulation). Other biomarkers, however, revealed potential greater impact in the dry season, when contaminants potentially concentrate (GST induction, AChE inhibition, and liver histopathological alterations). Although of a complex nature, field experiments such as this provide rich data for monitoring protocols and assessment of general risk of exposure to pollutants of river systems. © 2015, Springer-Verlag Berlin Heidelberg.

Onofrio V.C.,Instituto Butantan | Arzua M.,Museu de Historia Natural Capao da Imbuia | Labruna M.B.,University of Sao Paulo | Faccini J.L.H.,Federal Rural University of Rio de Janeiro | Barros-Battesti D.M.,Instituto Butantan
Neotropical Entomology | Year: 2010

Amblyomma scalpturatum Neumann has been reported in Brazil in the northern (States of Amazonas, Pará and Rondônia) and mid-western regions (States of Mato Grosso and Mato Grosso do Sul). It has been found in association with large and medium sized mammals, as Artiodactyla, Perissodactyla, Xenarthra and Carnivora. In this paper, this tick species is reported for the first time in the Brazilian states of Paraná and Roraima, southern and northern regions, respectively.

Bornatowski H.,Federal University of Paraná | Robert M.C.,Federal University of Paraná | Costa L.,Museu de Historia Natural Capao da Imbuia
Brazilian Journal of Oceanography | Year: 2010

Rhinobatos percellens is one of three species of Rhinobatidae found on Brazilian shores and is one of the most abundant species on the shallow continental shelf of Paraná and Santa Catarina States. Specimens caught by artisanal fishery between July/2001 and March/2003 by fishing communities located on the frontier between two southern Brazilian States (Paraná and Santa Catarina) had their stomach contents analyzed. According to the Alimentary Index (IAi), Decapoda (69%) and Teleostei (22%) were the main items consumed. Polychaeta, a common prey consumed by several benthonic fishes, was poorly represented in the feeding of R. percellens. This fact may be related to the availability of prey in the environment, or to the size of the guitarfish analyzed (ontogeny). Seasonal variance of main preys (with higher IAi) was observed: Dendrobranchiata and Pleocyemata displayed higher percentages in spring and autumn, Teleostei in the winter and Brachyura during the summer.

The dynamics of the bird community in a small forest fragment was evaluated along seven years in relation to changes in the surrounding landscape. The study area is an Araucaria forest fragment in Southern Brazil (state of Paraná). The sampling period covered the years 1988 through 1994 and the mark-release-recapture method was utilized. The landscape analysis was based on Landsat TM images, and changes in exotic tree plantations, native forest, open areas (agriculture, pasture, bare soil, and abandoned field), and "capoeira"(native vegetation ≤ 2 m) were quantified. The relationship between landscape changes and changes in abundance diversity of forest birds, open-area birds, forest-edge birds, and bamboo specialists was evaluated. Richness estimates were run for each year studied. The richness recorded in the study area comprised 96 species. The richness estimates were 114, 118 and 110 species for Chao 1, Jackknife 1 and Bootstrap, respectively. The bird community varied in species richness, abundance and diversity from year to year. As for species diversity, 1991, 1993 and 1994 were significantly different from the other years. Changes in the landscape contributed to the increase in abundance and richness for the groups of forest, open-area and bamboo-specialist species. An important factor discussed was the effect of the flowering of "taquara" (Poaceae), which contributed significantly to increasing richness of bamboo seed eaters, mainly in 1992 and 1993. In general, the results showed that landscape changes affected the dynamics and structure of the bird community of this forest fragment over time, and proved to have an important role in conservation of the avian community in areas of intensive forestry and agricultural activities.

Bispo A.A.,São Paulo State University | Scherer-Neto P.,Museu de Historia Natural Capao da Imbuia
Biota Neotropica | Year: 2010

In this study the community of birds in a small size remnant (10 ha) of Araucária forest, located in the city of Tijucas do Sul, Paraná was evaluated. During the period of November, 1999 to April 2001, 15 surveys had been carried, in which capture with mist nets and visual and aural contacts were used to estimate avian abundance and richness. We recorded 118 species of 35 families. According to the frequency of occurrence around 44% of species were considered with low frequency. When analyzed the trophics guilds, omnivorous and insectivorous of foliage were the most representative. By the capture method had been gotten 501 captures of 47 species. The capture species had relative abundances varying from 0.31 to 13.16% and the uniformity index was 0.83, demonstrating that the avian assemblage had a low dominance of some species. The structure of avian assemblage registered is expected for a small size remnant, with high relative abundance of generalists species and guilds, and the presence of a high number of species with low frequency of occurrence. Despite of, the specific composition presents a great number of species forest dependents showing that this forest remnant has a important role in the maintenance of species regionally.

Neto P.S.,Museu de Historia Natural Capao da Imbuia | Bispo A.A.,Federal University of Goais
Biota Neotropica | Year: 2011

The avifauna of Vila Rica do Espírito Santo State Park (PV) was studied from 1982 until 2007 in order to obtain the bird species composition. This protected area is located in in Fênix, a Parana state municipality that is inserted in a region whose landscape is a mosaic of patches of semideciduous forest and extensive areas of grain crops, sugar cane and pasture. It has an area of 354 ha covered mostly by second growth with mature characteristics and some places with primary sucession. The inventory was conducted using the methods of visual and aural recognition of bird species together captures with mist nets, during four periods. First, in 1982 with one expedition, the second period with 40 field expeditions between 1986 and 1999 and the third and fourth periods conducted respectively, from 2002 to 2003 and 2006, totaling in more 16 expeditions. This research has results in the record of 259 species of birds belonging to 55 families and 22 orders. The predominance of species of the Passeriformes order and Suboscines suborder suggests that the bird assemblage of the PV is characterized by forest elements. This environment is the most representative in the study area and has the largest number of species, 189 species, which are branches species (164 spp.), trunk species (14 spp.) and ground species (11 spp.). The PV has 14 endangered species and high species richness and this way present an important role on the regional landscape as a protected area. This landscape composed by some patches is fundamental to maintenance of local diversity, especially when these forest are protected in some way, as the case Vila Rica do Espírito Santo State Park which is a protected area with restricted use.

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