Publicações - ciências biológicas
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LIMA, GUSTAVO ZAMPIER DOS SANTOS;
LOPES, S. R.;
PRADO, THIAGO LIMA;
LOBÃO-SOARES, BRUNO;
DO NASCIMENTO, GEORGE C.;
FONTENELE-ARAUJO, JOHN;
CORSO, GILBERTO
Palavra-chave:
Plots de recorrência;
dinâmica não-linear;
Análise de sono;
Quantificadores de recorrência
Áreas do conhecimento:
Ciências Exatas e da Terra; Dinâmica Não-Linear;
Ciências Biológicas; Fisiologia; Fisiologia de Órgãos e Sistemas; Neurofisiologia
resumo ...
Arousals can be roughly characterized by punctual intrusions of wakefulness into sleep. In a standard perspective, using human electroencephalography (EEG) data, arousals are associated to slow-wave rhythms and K-complex brain activity. The physiological mechanisms that give rise to arousals during sleep are not yet fully understood. Moreover, subtle body movement patterns, which may characterize arousals both in human and in animals, are usually not detectable by eye perception and are not in general present in sleep studies. In this paper, we focus attention on accelerometer records (AR) to characterize and predict arousal during slow wave sleep (SWS) stage of mice. Furthermore, we recorded the local field potentials (LFP) from the CA1 region in the hippocampus and paired with accelerometer data. The hippocampus signal was also used here to identify the SWS stage. We analyzed the AR dynamics of consecutive arousals using recurrence technique and the determinism (DET) quantifier. Recurrence is a fundamental property of dynamical systems, which can be exploited to characterize time series properties. The DET index evaluates how similar are the evolution of close trajectories: in this sense, it computes how accurate are predictions based on past trajectories. For all analyzed mice in this work, we observed, for the first time, the occurrence of a universal dynamic pattern a few seconds that precedes the arousals during SWS sleep stage based only on the AR signal. The predictability success of an arousal using DET from AR is nearly 90%, while similar analysis using LFP of hippocampus brain region reveal 88% of success. Noteworthy, our findings suggest an unique dynamical behavior pattern preceding an arousal of AR data during sleep. Thus, the employment of this technique applied to AR data may provide useful information about the dynamics of neuronal activities that control sleep-waking switch during SWS sleep period. We argue that the predictability of arousals observed through DET(AR) can be functionally explained by a respiratory-driven modification of neural states. Finally, we believe that the method associating AR data with other physiologic events such as neural rhythms can become an accurate, convenient and non-invasive way of studying the physiology and physiopathology of movement and respiratory processes during sleep.
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BUMBEER, JANAÍNA;
Rosana Moreira da Rocha;
BORNATOWSKI, HUGO;
ROBERT, MAURÍCIO DE CASTRO;
AINSWORTH, CAMERON
Palavra-chave:
bioinvasão;
peixe;
Modelagem;
cadeia alimentar
Áreas do conhecimento:
Ciências Biológicas; Ecologia; Ecologia de Ecossistemas
resumo ...
The opportunistic feeder Pterois volitans is a voracious invader, causing large impacts in marine food-webs. We have used a Ecopath-with-Ecosim model to hypothesize an invasion by lionfish and to predict the likely impact of this potential generalist mesopredator in a subtropical food-web model. With thirty-three functional groups, the initial Ecopath model was balanced with a low biomass of lionfish (0.07 t/km2). In Ecosim, three scenarios of different vulnerability settings for the linkages between the introduced fish and its prey were tested, representing the default setting, a top-down control, and an extreme top-down control.
The scenarios were tested using different assumptions on the ability of the invasive fish to change the proportions of prey consumed according to prey availability. Our model predicted that the hypothesized lionfish invasion would have a strong impact on this subtropical marine food web: (1) by reducing prey populations and, consequently, food for native predators, and; (2) by predating on key species, causing direct impacts and possibly cascading trophic effects. Reef fish were the most affected, including some groups ecologically and economically important, like lutjanids and groupers. However, some adaptations in the fishing strategy of fishermen are expected which may affect other fish groups. Stakeholders should be warned of the potential ecological and socio-economic impacts that may arise from a lionfish invasion and various strategies and policy options should be immediately developed and applied (1) to prevent the arrival and establishment of the lionfish, and; (2) to make the ecosystem more resilient to this and other possible exotic species.
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CLAUDINEI EDSON DALLA CORTE;
HENRIQUE EMILIO ZOREL JUNIOR;
JOAO ALFREDO PEREIRA NETO;
JOSE SANTANA;
MARCIO JOSE CARDOSO;
Juliano Cordeiro
Revista SODEBRAS,
v. 12,
n. 133,
p. 164-169,
2017
Palavra-chave:
PROFOP;
Perfil Socioeducacional;
PROFESSOR
Áreas do conhecimento:
Ciências Humanas; Educação;
Ciências Biológicas; Biologia Geral; Ensino
resumo ...
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TINCANI, FLÁVIO H.;
GALVAN, GRABRIELI L.;
MARQUES, ANTONIO E.M.L.;
SANTOS, GUSTAVO S.;
PEREIRA, LETÍCIA S.;
DA SILVA, THIAGO A.;
DE ASSIS, HELENA C. SILVA;
BARBOSA, RONILSON V.;
Cestari, M.M.
Palavra-chave:
ensaio cometa;
acetilcolinesterase;
Lambari;
Danio rerio;
Genotoxicidade
Áreas do conhecimento:
Ciências Biológicas; Genética; Genotoxicidade em Peixes;
Ciências Biológicas; Genética; Genética Animal; Mutagênese Ambiental
resumo ...
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Guillermo Gonzaléz;
Almeida, LM.
Palavra-chave:
Coccinellini;
Genital apparatus;
New Species;
South America
Áreas do conhecimento:
Ciências Biológicas; Zoologia; Taxonomia dos Grupos Recentes
resumo ...
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SANT?ANNA, FERNANDO H.;
Fábio de Oliveira Pedrosa;
Emanuel Maltempi de Souza;
PASSAGLIA, LUCIANE M. P.;
Ambrosini, A.;
DE SOUZA, ROCHELI;
DE CARVALHO FERNANDES, GABRIELA;
BACH, EVELISE;
Eduardo Balsanelli;
BAURA, VALTER;
BRITO, LUCIANA F.;
WENDISCH, VOLKER F.
Áreas do conhecimento:
Ciências Biológicas; Biologia Molecular
resumo ...
Species from the genus Paenibacillus are widely studied due to their biotechnological relevance. Dozens of novel species descriptions of this genus were published in the last couple of years, but few utilized genomic data as classification criteria. Here, we demonstrate the importance of using genome-based metrics and phylogenetic analyses to identify and classify Paenibacillus strains. For this purpose, Paenibacillus riograndensis SBR5T, Paenibacillus sonchi X19-5T, and their close relatives were compared through phenotypic, genotypic, and genomic approaches. With respect to P. sonchi X19-5T, P. riograndensis SBR5T, Paenibacillus sp. CAR114, and Paenibacillus sp. CAS34 presented ANI (average nucleotide identity) values ranging from 95.61 to 96.32%, gANI (whole-genome average nucleotide identity) values ranging from 96.78 to 97.31%, and dDDH (digital DNA–DNA hybridization) values ranging from 68.2 to 73.2%. Phylogenetic analyses of 16S rRNA, gyrB, recA, recN, and rpoB genes and concatenated proteins supported the monophyletic origin of these Paenibacillus strains. Therefore, we propose to assign Paenibacillus sp. CAR114 and Paenibacillus sp. CAS34 to P. sonchi species, and reclassify P. riograndensis SBR5T as a later heterotypic synonym of P. sonchi (type strain X19-5T), with the creation of three novel genomovars, P. sonchi genomovar Sonchi (type strain X19-5T), P. sonchi genomovar Riograndensis (type strain SBR5T), P. sonchi genomovar Oryzarum (type strain CAS34T = DSM 1...
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NEVES, FELIPE MARCEL;
VIANA, R. L.;
PIE, MARCIO ROBERTO
Palavra-chave:
Plots de recorrência
Áreas do conhecimento:
Ciências Exatas e da Terra; Física; Física Geral; Dinamica Nao-Linear e Caos;
Ciências Biológicas; Zoologia; Comportamento Animal
resumo ...
In this study, we used recurrence quantification analysis (RQA) and recurrence plots (RPs) to compare the movement activity of individual workers of three ant species, as well as a gregarious beetle species. RQA and RPs quantify the number and duration of recurrences of a dynamical system, including a detailed quantification of signals that could be stochastic, deterministic, or both. First, we found substantial differences between the activity dynamics of beetles and ants, with the results suggesting that the beetles have quasi-periodic dynamics and the ants do not. Second, workers from different ant species varied with respect to their dynamics, presenting degrees of predictability as well as stochastic signals. Finally, differences were found among minor and major caste of the same (dimorphic) ant species. Our results underscore the potential of RQA and RPs in the analysis of complex behavioral patterns, as well as in general inferences on animal behavior and other biological phenomena.
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BORTOLUZZI, SIDNEI;
Caron, Edilson;
Cibele Stramare Ribeiro-Costa
Palavra-chave:
Taxonomy;
morphology;
New Species
Áreas do conhecimento:
Ciências Biológicas; Zoologia; Taxonomia dos Grupos Recentes;
Ciências Biológicas; Zoologia; Morfologia dos Grupos Recentes;
Ciências Biológicas; Zoologia; Evolução
resumo ...
(en)
The rove beetle genus Hypotelus Erichson, 1839 is one of seven extant genera of a subfamily with a historically misinterpreted concept, status and phylogenetic position. The genus comprises minute species that have been found under the bark of trees or in leaf litter mainly in Neotropical forests. The major aim of this study was to test the monophyly of this genus based on adult morphology and to review its species. Cladistic analyses were performed and Hypotelus is a monophyletic genus supported by 8 synapomorphies and includes five new species: H . brevitarsus sp. nov., H . castaneus sp. nov., H . corniculatus sp. nov., H. melanodelta sp. nov. and H. scheerpeltzi sp. nov. Additionally, all species are described/redescribed and illustrated, most of them for the first time. An identification key, geographical records and natural history data for each species are also provided.
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ZACCA, THAMARA;
Marlon Paluch;
SIEWERT, RICARDO;
FREITAS, ANDRÉ VICTOR LUCCI;
BARBOSA, EDUARDO;
MIELKE, OLAF;
Mirna Martins Casagrande
Palavra-chave:
Atlantic Forest;
Cercyeuptychia;
DNA barcode;
Euptychiina;
Praefaunula
resumo ...
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Erika Ivanna Araya;
NONES, CARINA FERNANDA MATTEDI;
Luiz Eduardo Nunes Ferreira;
Cunha, Joice M.;
Juliana Geremias Chichorro
Palavra-chave:
dor orofacial;
estreptozotocina;
TRPV-1;
hiperalgesia neuropática
Áreas do conhecimento:
Ciências Biológicas; Farmacologia da Dor; Hiperalgesia Inflamatória
resumo ...
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