Publicações - ciências biológicas
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Nayane Peixoto;
Vanessa Souza Vieira;
Dayane Kelly Sabec PEREIRA;
Fabiano Campos Lima;
Eugênio Gonçalves de Araújo;
Kleber Fernando Pereira
Áreas do conhecimento:
Ciências Biológicas; Bioquímica dos Microorganismos; Enzimologia
resumo ...
ABSTRACT: New World primates Sapajus sp. unexpectedly display cognitive aspects, tool use,...
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SOARES DE OLIVEIRA, IGOR;
BUENO NOLETO, RAFAEL;
KARLOKOSKI CUNHA DE OLIVEIRA, ADRIELE;
TOLEDO, LUÍS FELIPE;
Cestari, M.M.
Palavra-chave:
citogenética de anuros;
Anuros
Áreas do conhecimento:
Ciências Biológicas; Citogenética de Anuros
resumo ...
We conducted a cytogenetic study of four hyline frog species (Dendropsophus elegans, D. microps, D. minutus and D. werneri) from southern Brazil. All species had 2n = 30 chromosomes, with interspecific and intraspecific variation in the numbers of metacentric, submetacentric, subtelocentric and telocentric chromosomes. C-banding and fluorochrome staining revealed conservative GC-rich heterochromatin localized in the pericentromeric regions of all species. The location of the nucleolus organizer regions, as confirmed by fluorescent in situ hybridization, differed between species. Telomeric probes detected sites that were restricted to the terminal regions of all chromosomes and no interstitial or centromeric signals were observed. Our study corroborates the generic synapomorphy of 2n = 30 chromosomes for Dendropsophus and adds data that may become useful for future taxonomic revisions and a broader understanding of chromosomal evolution among hylids.
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Luana Cagol;
Izabel Volkweis Zadinelo;
Lucíola Thais Baldan;
Eduardo Luis Cupertino Ballester;
Tania Cristina Pontes;
Lilian Dena dos Santos
Acta Iguazu,
v. 5,
n. 3,
p. 71-82,
2016
Palavra-chave:
Toxicidade;
FOSFATO;
Qualidade de Agua
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Aqüicultura;
Ciências Biológicas; Biologia Geral; Piscicultura
resumo ...
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André de Camargo Guaraldo;
Jeffrey F. Kelly;
Miguel Ângelo Marini
JOURNAL OF ORNITHOLOGY,
v. 157,
n. 3,
p. 695-705,
2016
Palavra-chave:
Migração;
isótopos estáveis;
Elaenia chiriquensis;
Elaenia cristata;
Ecologia de invernada;
Cerrado
resumo ...
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SUITA, SABRINA M.;
BRAGA, ANDRÉ;
Eduardo Luis Cupertino Ballester;
CARDOZO, ALESSANDRO P.;
Abreu, Paulo Cesar;
WASIELESKY, WILSON
Palavra-chave:
Litopenaeus vannamei;
nursery
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Aqüicultura;
Ciências Biológicas; Biologia Geral; Aquacultura; Carcinicultura
resumo ...
The aim of this study was to use preselected quality indicators for Litopenaeus vannamei post-larvae and the stable isotopes technique with δ13C and δ15N to determine the influence of bioflocs in shrimp feeding during the nursery phase, between PL1 and PL30. A control treatment (CT) with water renewal was compared to a biofloc treatment (BT) that received organic carbon fertilizations. Different types of commercial feed (Stresspak and Flake-INVE™, PL40-GUABI™), microalgae (Chaetoceros muelleri) and Artemia sp. nauplii were used as food sources. The physical and chemical parameters of water and ammonia were monitored daily, and nitrite, nitrate and alkalinity were measured weekly. Suspended solids and the microorganisms of bioflocs were characterized. At the end of the experiment, fifteen shrimps of each replicate were collected to evaluate nine larvae quality indicators. Isotopic values of 13C and 15N of food sources and shrimp tissues were collected on days 10, 20 and 30, and a Bayesian model of isotopic mixture measured the contributions of these sources to the shrimp biomass. Salinity, alkalinity and nitrite differed significantly between the treatments but were appropriate for post-larvae production. The larvae quality conditions in the CT treatment were ranked as “good,” whereas the BT conditions were considered “excellent” according to the analysis of larval quality parameters. The stable isotopes analysis showed that the PL40 GUABI™ feed was the most important food source throughout the experimental period in the CT. In the BT (10th and 20th days), the bioflocs and commercial feeds (Flake-INVE™, PL40-GUABI™) did not present significant variations in their contribution ratios; however, on the 30th day, the contribution of the PL40-GUABI™ feed was higher when compared to bioflocs. In general, the commercial feed played a more important role as a food source for Litopenaeus vannamei larvae during the nursery phase, although the consumption of bioflocs led to a better larvae quality.
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LIEBEL, SAMUEL;
REGINA GRÖTZNER, SONIA;
DIETRICH MOURA COSTA, DANIELE;
M. A. F. Randi;
ALBERTO DE OLIVEIRA RIBEIRO, CIRO;
Filipak Neto, Francisco
Palavra-chave:
estresse celular;
perfil proteico;
cilindrospermopsina
Áreas do conhecimento:
Ciências Biológicas; Morfologia; Citologia e Biologia Celular;
Ciências Biológicas; Bioquímica; Biologia Molecular
resumo ...
Human hepatoma cells (HepG2) were exposed to purified cylindrospermopsin (CYN), a potent toxicant for eukaryotic cells produced by several cyanobacteria. Exposure to 10 μg l−1 of CYN for 24 h resul...
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LIEBEL, SAMUEL;
Sonia Grötzner;
DIETRICH MOURA COSTA, DANIELE;
ANTÔNIO FERREIRA RANDI, MARCO;
ALBERTO DE OLIVEIRA RIBEIRO, CIRO;
Francisco Filipak Neto
Palavra-chave:
cylindrospermopsin;
HepG2;
immunofluorescence;
proteomic;
xenobiotic
Áreas do conhecimento:
Ciências Biológicas; cells culture;
Ciências Biológicas; Biologia Geral; Histologia;
Ciências Biológicas; Farmacologia; Toxicologia; Toxicologia Ambiental
resumo ...
Human hepatoma cells (HepG2) were exposed to purified cylindrospermopsin (CYN), a potent toxicant for eukaryotic cells produced by several cyanobacteria. Exposure to 10 μg l−1 of CYN for 24 h resul...
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SANCHEZ, ELADIO FLORES;
RICHARDSON, MICHAEL;
Luiza Helena Gremski;
Silvio Sanches Veiga;
YARLEQUE, ARMANDO;
NILAND, STEPHAN;
LIMA, AUGUSTO MARTINS;
ESTEVAO-COSTA, MARIA INÁCIA;
EBLE, JOHANNES ANDREAS
Palavra-chave:
Bothrops barnetti;
Veneno;
metaloproteases;
barnettlysin-I;
Fibrinolisis;
atividade antitrombótica
Áreas do conhecimento:
Ciências Biológicas; Bioquímica dos Microorganismos; Enzimologia;
Ciências Biológicas; Morfologia; Citologia e Biologia Celular;
Ciências Biológicas; Bioquímica; Bioquímica
resumo ...
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DECONTO, LUCIMARY S.;
Emygdio Leite de Araújo Monteiro-Filho
Palavra-chave:
estuary;
whistles;
clicks;
calls;
sound;
Cetacean
Áreas do conhecimento:
Ciências Biológicas; Comportamento Animal;
Ciências Biológicas; Zoologia; Etologia
resumo ...
Many cetaceans are known to be acoustically active at night. However, for most dolphin species, there is little information about their nocturnal acoustic activities. To study the acoustic repertoire of Sotalia guianensis, diurnal and nocturnal sounds (whistles, burst pulses, low-frequency narrowband (LFN) sounds, and clicks) were identified in the Cananéia estuary (25° 01′ S–25° 13′ S/47° 52′ W–48° 06′ W), south of the state of São Paulo, southeastern Brazil, during April, June, and November of 2012. The emission rate of these sounds was compared between daytime and nighttime using the chi-squared statistical test. The mean values of the acoustic parameters of whistles, burst pulses, LFN sounds, and clicks were compared using the t test. Whistles, burst pulses, and LFN sounds were more frequent at night, as these individuals require greater acoustic communication in the absence of light, mainly for social communication. Echolocation emission rates were similar in both day and nighttime. Dolphin sound structure also varied throughout the day, with dolphins emitting lower-frequency sounds at night. Low-frequency sounds, with longer wavelengths, provide many advantages for dolphins active at night because such sounds propagate greater distances. This study demonstrates that the sounds produced by S. guianensis are dependent on the time of day, with social communication sounds being more influenced by the presence of light.
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HÖFER, HUBERT;
Renato Marques;
Ricardo Miranda de Britez;
Robson Luois Capretz
Palavra-chave:
floresta atlântica;
Serapilheira;
ciclagem de nutrientes
Áreas do conhecimento:
Ciências Biológicas; Ecologia; Ecologia de Ecossistemas
resumo ...
RESUMO Este trabalho objetivou avaliar a deposição de serapilheira em três formações secundárias...
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