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Brazilian Journal of Biology, Revista Brasleira de Biologia

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https://www.readbyqxmd.com/read/28832842/estimation-of-peacock-bass-cichla-spp-mortality-rate-during-catch-release-fishing-employing-different-post-capture-procedures
#1
L S A Barroco, C E C Freitas, Á C Lima
The effect of catch-and-release fishing on the survival of peacock bass (Cichla spp.) was evaluated by comparing two types of artificial bait (jig and shallow-diver plugs) and two types of post-catch confinement. Two experiments were conducted during the periods January-February and October-November 2012 in the Unini River, a right-bank tributary of the Negro River. In total, 191 peacock bass were captured. Both groups of fish were subjected to experimental confinement (collective and individual) for three days...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832841/first-report-of-the-alien-species-trichopodus-trichopterus-pallas-1770-in-the-state-of-cear%C3%A3-brazil
#2
C A S Rodrigues-Filho, R C Gurgel-Lourenço, J I Sánchez-Botero
No abstract text is available yet for this article.
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832840/biomarkers-and-bioindicators-of-the-environmental-condition-using-a-fish-species-pimelodus-maculatus-lacep%C3%A3-de-1803-in-a-tropical-reservoir-in-southeastern-brazil
#3
F G Araújo, C N Morado, T T E Parente, F J R Paumgartten, I D Gomes
The Funil Reservoir receives a large amount of xenobiotics from the Paraíba do Sul River (PSR) from large number of industries and municipalities in the watershed. This study aimed to assess environmental quality along the longitudinal profile of the Paraíba do Sul River-Funil Reservoir system, by using biomarkers and bioindicators in a selected fish species. The raised hypothesis is that Funil Reservoir acts as a filter for the xenobiotics of the PSR waters, improving river water quality downstream the dam...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832839/condition-factor-variations-over-time-and-trophic-position-among-four-species-of-characidae-from-amazonian-floodplain-lakes-effects-of-an-anomalous-drought
#4
I A Tribuzy-Neto, K G Conceição, F K Siqueira-Souza, L E Hurd, C E C Freitas
The effects of extreme droughts on freshwater fish remain unknown worldwide. In this paper, we estimated the condition factor, a measure of relative fitness based on the relationship of body weight to length, in four fish species representing two trophic levels (omnivores and piscivores) from Amazonian floodplain lakes for three consecutive years: 2004, 2005 (an anomalous drought year), and 2006. The two omnivores, Colossoma macropomum and Mylossoma duriventre, exhibited trends consistent with their life cycles in 2004 and 2006: high values during the hydrologic seasons of high water, receding water, and low water, with a drop following reproduction following the onset of rising water...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832838/phenology-of-guarea-macrophylla-vahl-meliaceae-in-subtropical-riparian-forest-in-southern-brazil
#5
A Müller, J L Schmitt
Climate is one of the main factors that affect plant behavior. The phenology of Guarea macrophylla Vahl, which is a small tree used for reforestation of degraded areas, was monitored for 18 months in a riparian forest at the Schmidt Stream, Campo Bom, in the state of Rio Grande do Sul, southern Brazil. Vegetative (leaf fall and leaf flushing) and reproductive events were observed, with the latter divided into flowering (flower buds and anthesis) and fruiting (unripe, ripening and ripe fruit). Phenological events were related to temperature, photoperiod and precipitation and their seasonality was verified by circular statistical analysis...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832837/analysis-of-the-landscape-complexity-and-heterogeneity-of-the-pantanal-wetland
#6
C S Miranda, R M Gamarra, C L Mioto, N M Silva, A P Conceição, A Pott
This is the first report on analysis of habitat complexity and heterogeneity of the Pantanal wetland. The Pantanal encompasses a peculiar mosaic of environments, being important to evaluate and monitor this area concerning conservation of biodiversity. Our objective was to indirectly measure the habitat complexity and heterogeneity of the mosaic forming the sub-regions of the Pantanal, by means of remote sensing. We obtained free images of Normalized Difference Vegetation Index (NDVI) from the sensor MODIS and calculated the mean value (complexity) and standard deviation (heterogeneity) for each sub-region in the years 2000, 2008 and 2015...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832836/microencapsulation-of-essential-thyme-oil-by-spray-drying-and-its-antimicrobial-evaluation-against-vibrio-alginolyticus-and-vibrio-parahaemolyticus
#7
O Tomazelli, F Kuhn, P J M Padilha, L R M Vicente, S W Costa, A A Boligon, J Scapinello, C N Nesi, J Dal Magro, S Lamo Castellví
The aims of this research were first, to evaluate the antibacterial potential of commercial thyme essential oil against V. alginolyticus and V. parahaemolyticys and second, using the spray drying technique to produce microcapsules. chemical compounds of thyme oil and microcapsules were identified and quantified being thymol the chemical component present at the highest concentration. Oil-in-water (O/W) emulsions were prepared and the microcapsules were obtained with a spray dryer using maltodextrin as wall material (ratio 1:4)...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832835/toxicity-of-synthetic-flavorings-nature-identical-and-artificial-to-hematopoietic-tissue-cells-of-rodents
#8
I M S Sales, J M Silva, E S R Moura, F D S Alves, F C C Silva, J M C Sousa, A P Peron
The goal of this study was to analyze cytotoxicity, genotoxicity and mutagenicity to bone marrow cells of mice of nature identical synthetic flavorings, passion fruit and strawberry, and artificial synthetic flavorings, vanilla, chocolate, tutti-frutti and cookie, at doses 0.5; 1.0; 2.0; 5.0 and 10.0 mL/kg. The additives were given to the animals by gavage in a single daily application for seven days. Data were subjected to analysis of variance (ANOVA) followed by post Tukey's post hoc test, p <0.05. Animals treated with 2...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832834/perkinsus-beihaiensis-perkinsozoa-in-oysters-of-bahia-state-brazil
#9
M S A Luz, F S Carvalho, H C Oliveira, G Boehs
This study reports the pathogen Perkinsus beihaiensis in oysters of the genus Crassostrea on the coast of the State of Bahia (Brazil), its prevalence, infection intensity and correlation with salinity. Oysters (n = 240) were collected between October and December 2014 at eight sampling stations between latitudes 13°55'S and 15°42'S. The laboratory procedures included macroscopic analysis, histology, culture in Ray's fluid thioglycollate medium (RFTM), Polymerase Chain Reaction (PCR) and DNA sequencing. PCR and sequencing have been used for the genetic identification of oysters as well...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832833/characterization-of-digestive-enzymes-from-captive-brazilian-flounder-paralichthys-orbignyanus
#10
F B Candiotto, A C V Freitas-Júnior, R C A Neri, R S Bezerra, R V Rodrigues, L A Sampaio, M B Tesser
Knowledge of specific enzyme activity, along with animal habits and digestive capacity is essential in formulating an appropriate diet for any species. In this study, we evaluated and characterized the activity of digestive enzymes present in the liver, intestine, and stomach of Paralichthys orbignyanus. The effects of pH and temperature on enzyme activity were also evaluated via the use of specific substrates. The use of specific substrates and inhibitors showed strong evidence of the presence of trypsin (BApNA= 0...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832832/reproductive-cycle-of-mytella-guyanensis-lamarck-1819-in-a-marine-reserve-resex-bay-of-iguape-bahia-brazil
#11
V M A Camilo, J da C Souza, E de J Conceição, J R Luz, G Boehs, S Campiolo
Mytella guyanensis, consumed and commercialized in coastal regions of Brazil, is one of several bivalve species of socioeconomic interest for coastal communities. Besides serving as a source of income and subsistence for these communities, it also contributes to their food security as it is a source of proteins and micronutrients. Thus, the reproductive cycle of this species was studied aiming to contribute to food security and its preservation. Samples were collected monthly, between March 2014 and March 2015, in a natural stock (12°38'50"S; 38°51'43"W) in a Marine Reserve (RESEX Bay of Iguape) (community Engenho da Ponte), Bahia, Brazil...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832831/assessment-of-the-antibacterial-cytotoxic-and-antioxidant-activities-of-morus-nigra-l-moraceae
#12
G R Souza, R G Oliveira-Junior, T C Diniz, A Branco, S R G Lima-Saraiva, A L Guimarães, A P Oliveira, A G M Pacheco, M G Silva, M O Moraes-Filho, M P Costa, C Ó Pessoa, J R G S Almeida
This study was carried out to assess the antibacterial, cytotoxic and antioxidant activities of extracts of Morus nigra L. HPLC was used to determine the fingerprint chromatogram of the crude ethanolic extract (Mn-EtOH). The antibacterial effect was assessed through the method of microdilution. The cytotoxicity was tested against human tumour cell lines using the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay. The total phenolic and flavonoid contents were also assessed through the Folin-Ciocalteu and aluminum chloride methods, respectively...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832830/using-in-situ-flow-cytometry-images-of-ciliates-and-dinoflagellates-for-aquatic-system-monitoring
#13
G C Pereira, A R Figueiredo, N F F Ebecken
Short-period variability in plankton communities is poorly documented, especially for variations occurring in specific groups in the assemblage because traditional analysis is laborious and time-consuming. Moreover, it does not allow the high sampling frequency required for decision making. To overcome this limitation, we tested the submersible CytoSub flow cytometer. This device was anchored at a distance of approximately 10 metres from the low tide line at a depth of 1.5 metres for 12 hours to monitor the plankton at a site in the biological reserve of Barra da Tijuca beach, Rio de Janeiro...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28832829/variation-in-the-isotopic-composition-of-striped-weakfish-cynoscion-guatucupa-of-the-southwest-atlantic-ocean-in-response-to-dietary-shifts
#14
M N Paso Viola, L Riccialdelli, A Jaureguizar, H O Panarello, H L Cappozzo
The aim of this study was to analyze the isotopic composition in muscle of striped weakfish Cynoscion guatucupa from Southwest Atlantic Ocean in order to evaluate a possible variation in δ13C and δ15N in response to dietary shifts that occur as animals grow. We also explored for isotopic evidence of differences between sample locations. The results showed an agreement between isotope analysis and previous conventional studies. Differences in the isotope composition between sampling location were not observed...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793033/a-contribution-for-the-limnological-knowledge-of-basaltic-knickzones
#15
E M Brambilla, A M C Ruocco, M G Nogueira
The knickzones are defined as locally steep riverbed segments, such as a convex reach in a concave-up longitudinal profile. They are worldwide distributed and geologically well studied, but despite their distinctiveness as a particular kind of macrohabitat there is a notorious lack of ecological knowledge. In this context, this research proposal aims to provide a physical description, in terms of kind of habitats, and a limnological characterization of a basaltic knickzone. Information is based on a case study carried out in the Sapucaí-Mirim River, Southeast Brazil...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793032/protein-from-hevea-brasiliensis-hev-b-13-latex-attenuates-systemic-inflammatory-response-and-lung-lesions-in-rats-with-sepsis
#16
L A Araújo, P R Melo-Reis, F Mrue, C M Gomes, M A P Oliveira, H M Silva, M M Alves, N J Silva-Júnior
Sepsis induces a severe systemic inflammatory response that may result in multiple organ dysfunction and death. Studies using a protein derived from natural Hevea brasiliensis (rubber tree) latex, denominated Hev b 13, have demonstrated important anti-inflammatory effects, but no data have been published regarding its effects on sepsis. The aim of this study was to investigate the effects of Hev b 13 on the inflammatory response and lung lesions of septal rats. Male Wistar rats were submitted to cecal ligation and puncture (CLP), randomized into groups and treated with subcutaneously administered doses of 0...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793031/airborne-fungi-in-an-intensive-care-unit
#17
C L Gonçalves, F V Mota, G F Ferreira, J F Mendes, E C Pereira, C H Freitas, J N Vieira, J P Villarreal, P S Nascente
The presence of airborne fungi in Intensive Care Unit (ICUs) is associated with increased nosocomial infections. The aim of this study was the isolation and identification of airborne fungi presented in an ICU from the University Hospital of Pelotas - RS, with the attempt to know the place's environmental microbiota. 40 Petri plates with Sabouraud Dextrose Agar were exposed to an environment of an ICU, where samples were collected in strategic places during morning and afternoon periods for ten days. Seven fungi genera were identified: Penicillium spp...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793030/mosquito-species-occurrence-in-association-with-landscape-composition-in-green-urban-areas
#18
F R G Montagner, O S Silva, S M Jahnke
Aedes aegypti prefers densely populated habitats, but has been shown to explore less anthropogenic environments. We investigated composition of the abundance of mosquitoes in forested areas and assessed relationships between species occurrences and different types of land use and land cover at three spatial scales (100m, 500m and 1000m). Mosquitoes were collected from October 2012 to March 2013 using oviposition traps. We collected 4,179 mosquitoes in total including at least 10 species. Aedes albopictus and Limatus durhami were eudominant species, representing 90% of all collected individuals...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793029/chemical-composition-antimicrobial-and-antioxidant-potential-of-the-essential-oil-of-guarea-kunthiana-a-juss
#19
J A Pandini, F G S Pinto, M C Scur, C B Santana, W F Costa, L G Temponi
The essential oils are extracted from plant compounds and can present activities antimicrobial and antioxidant properties. The goals of the present study were: (a) to determine the chemical composition of the essential oil of Guarea kunthiana A. Juss using the method of gas chromatography coupled to mass spectrometry (GC-MS); (b) to evaluate the antimicrobial potential of this oil using the broth microdilution method against different microorganisms: five Gram-negative bacteria, four Gram-positive bacteria and a yeast and (c) to determine the antioxidant activity of the oil using the DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical assay...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793028/alternative-food-sources-for-the-ladybird-brumoides-foudrasii-mulsant-coleoptera-coccinellidae
#20
M S de Lima, J W S Melo, R Barros
The predator Brumoides foudrasii (Mulsant) (Coleoptera, Coccinellidae) has been naturally found in plants infested by mealybugs. In this study, the striped mealybug Ferrisia dasylirii (Cockerell) (Hemiptera, Pseudococcidae) and Anagasta kuehniella Zeller (Lepidoptera, Pyralidae) eggs were evaluated as diets for the development and reproduction of B. foudrasii. Brumoides foudrasii immatures developed faster when fed with A. kuehniella eggs than when fed with F. dasylirii. However, the survival and longevity of B...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
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