Publicações - ciências biológicas
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Antônio Freire de Carvalho Filho;
Fernando Willyan Trevisan Leivas;
Thamyrys Bezerra de Souza
Palavra-chave:
besouros;
Biodiversidade;
Clown beetles;
comportamento
Áreas do conhecimento:
Ciências Biológicas; Zoologia; Taxonomia dos Grupos Recentes
resumo ...
Hololepta (Leionota) reichii Marseul is a widespread but rarely encountered natural enemy of social bees, so we evaluated feeding habits and behavior of such a clown beetle regarding bees, beehive by-products, and other sources of food under a monitored environment. The experiments revealed that H. reichii preferentially predates larvae and pupae of social bees extracted from brood cells, but also feeds on dead adult stingless bees and on larvae and pupae inside cells. This note reports the first finding of clown beetles (Coleoptera, Histeridae) in a hive aggregation of stingless and honey bees in natural conditions and expands the known distribution of the species to the state of Espírito Santo, the second record in the Brazilian Atlantic Forest.
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Ana Gabriela Lins Seabra;
Izabel Volkweis Zadinelo;
Luiz Gustavo Ribeiro Pereira;
Rafael Ernesto Balen;
Patrícia da Silva Dias;
Fábio Meurer
Palavra-chave:
Brazilian native fish;
Carnivorous fish;
feed management;
feed efficiency
resumo ...
(en)
The present work is aimed to determine the best feeding level to pacamã ( Lophiosilurus alexandri ) fingerlings at performance, survival, and body parameters. One hundred One hundred and twenty five fingerlings with mean body weight of 3.57±0.05g were used and distributed in a completely randomized design with five treatments and four replicates during 30 days. The treatments were five feeding levels: 3, 6, 9, 12, and 15% of body weight day -1 of to pacamã fingerlings fish, were feeding twice times daily, 08h00 and 18h00. The diet contained 57,28% crude protein and 3.405,98 Kcal kg -1 gross energy. Water temperature ranging of27.3°C to 28.6°C, and dissolved oxygen was 5.0 mg/L. A quadratic effect (P<0.01) was observed to final weight, weight gain, specific growth rate, and final length. Survival, carcass yield, carcass without head yield, height, head length parameters no showed difference (P>0.05) in function of feeding level. Feeding level of 9.5 % of body weight is recommending to pacamã fingerlings.
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COELHO, L. C. M.;
CRUZ, J. V.;
MABA, I. K.;
Aleksander Roberto Zampronio
Palavra-chave:
febre;
zimosan;
ácido poliinosínico policetidilico;
lipopolisacarídeo;
endotelina-1;
sexo
resumo ...
Sex differences in the immune response can also affect the febrile response, particularly the fever induced by lipopolysaccharide (LPS). However, other pathogen-associated molecular patterns, such as zymosan A (Zym) and polyinosinic-polycytidylic acid (Poly I:C), also induce fever in male rats with a different time course of cytokine release and different mediators such as endothelin-1 (ET-1). This study investigated whether female sex hormones affect Zym- and Poly I:C-induced fever and the involvement of ET-1 in this response. The fever that was induced by Zym and Poly I:C was higher in ovariectomized (OVX) female rats compared with sham-operated female rats. Estrogen replacement in OVX females reduced Zym- and Poly I:C-induced fever. The ETB receptor antagonist BQ788 reversed the LPS-induced fever in cycling females but not in OVX females. BQ788 did not alter the fever that was induced by Zym or Poly I:C in either cycling or OVX females. These findings suggest that the febrile response in cycling females is lower, independently of the stimulus that is inducing it and is probably controlled by estrogen. Also, ET-1 seems to participate in the febrile response that was induced by LPS in males and cycling females but not in the LPS-induced fever in OVX females. Additionally, ET-1 was not involved in the febrile response that was induced by Zym or Poly I:C in females.
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Carlos Eduardo Belz;
SIMONE, LUIZ RICARDO L. DE;
SILVEIRA JÚNIOR, NELSON;
BAGGIO, RAFAEL ANTUNES;
GERNET, MARCOS DE VASCONCELLOS;
BIRCKOLZ, CARLOS JOÃO
Palavra-chave:
Mollusks;
Aquicultura;
Bioinvasões;
Espécies Invasoras
Áreas do conhecimento:
Ciências Biológicas; Zoologia; Taxonomia dos Grupos Recentes;
Ciências Biológicas; Zoologia; Zoologia Aplicada; Espécies Exóticas
resumo ...
(en)
The genus Mytilus comprises a large number of bivalve mollusk species distributed throughout the world and many of these species are considered invasive. In South America, many introductions of species of this genus have already taken place, including reports of hybridization between them. Now, the occurrence of the Mediterranean mussel Mytilus galloprovincialis is reported for the first time from the Brazilian coast. Several specimens of this mytilid were found in a shellfish growing areas in Florianópolis and Palhoça, Santa Catarina State, Brazil. Morphological analysis of the shells and molecular analysis through sequencing of the cytochrome oxidase subunit 1 (COI) confirmed the taxonomic identification. The species is known for its great invasive potential and can become a major environmental problem for seafood business and coastal communities, as it can compete and even hybridize with local species.
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Thiago Augusto da Silva;
Eduardo Luis Cupertino Ballester;
Almir Cunico
Palavra-chave:
Macrobrachium;
Carcinicultura;
espécies exóticas
Áreas do conhecimento:
CIENCIAS_AGRARIAS; Aqüicultura;
Ciências Biológicas; Ecologia; Ecologia de Ecossistemas;
Ciências Biológicas; Biologia Geral; Aquacultura; Carcinicultura
resumo ...
Abstract: Aim The objective of this work is to record the occurrence of non-native species...
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KRETZSCHMAR, GABRIELA CANALLI;
ANTONIAZZI, ANGELA ADRIANE HANEL;
OLIVEIRA, LUANA CAROLINE;
NISIHARA, RENATO MITSUNORI;
Maria Luiza Petzl-Erler;
DE SOUZA, RICARDO LEHTONEN R.;
Boldt, Angelica Beate Winter
Palavra-chave:
LOAD;
CR1;
sCR1;
Alzheimer Disease;
genetic susceptibility
Áreas do conhecimento:
Ciências Biológicas; Genética; Imunogenética; Doenças Auto Imunes;
Ciências Biológicas; Genética; Genética Humana e Médica; Imunogenética
resumo ...
The CR1 gene has been widely studied in Alzheimer’s disease (AD), since its first association with the disease in 2009. Even after 11 years of this discovery, the role of this gene in AD has not yet been fully elucidated and the association of its variants was not validated in Latin American populations. We genotyped five CR1 single nucleotide polymorphisms (SNPs rs6656401, rs3849266, rs2274567, rs4844610, and rs12034383) in up to 162 AD patients and 137 controls through PCR-SSP and iPLEX MassARRAY Platform (Sequenom), and measured soluble CR1 (sCR1) levels in plasma of 40 AD patients and 39 controls with an enzyme-linked immunosorbent assay (ELISA). Homozygosity for haplotype rs3849266*C_rs2274567*A (CA/CA genotype) was associated with susceptibility to AD (OR = 2.94, p = 0.018). Patients presented higher sCR1 levels in plasma than controls (p = 0.038). Furthermore, patients that carry the rs2274567*G allele (p.1208Arg) presented higher sCR1 levels than A/A (p.1208His/His) homozygotes (p = 0.036). This is the first study to validate the association of CR1 polymorphisms with late-onset Alzheimer’s disease, as well as to evaluate sCR1 levels in a Latin American population. SNPs present in the regulatory and coding regions of this gene may be playing a key role in the observed association, probably by interfering in Aβ plaques clearance. Inhibition may be due to the increase in local sCR1 levels observed in patients, which may result from polymorphisms leading to larger isoforms of CR1 and/or structural alterations of the protein that makes it less functional, as well as increased vesiculation of the molecules.
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Gabriela Canalli Kretzschmar;
Ângela A Hanel Antoniazzi;
Luana Caroline de Oliveira;
Renato Mitsunori Nisihara;
Maria Luiza Petzl-Erler;
Ricardo Lehtonen de Souza;
Angelica Beate Winter Boldt
Palavra-chave:
doença de Alzheimer;
CR1;
sCR1;
receptor 1 do complemento;
polimorfismo;
PCR-SSP
Áreas do conhecimento:
Ciências Biológicas; Genética Humana e Médica;
Ciências Biológicas; Genética; Genética Humana e Médica; Imunogenética
resumo ...
The CR1 gene has been widely studied in Alzheimer’s disease (AD), since its first association with the disease in 2009. Even after 11 years of this discovery, the role of this gene in AD has not yet been fully elucidated and the association of its variants was not validated in Latin American populations. We genotyped five CR1 single nucleotide polymorphisms (SNPs rs6656401, rs3849266, rs2274567, rs4844610, and rs12034383) in up to 162 AD patients and 137 controls through PCR-SSP and iPLEX MassARRAY Platform (Sequenom), and measured soluble CR1 (sCR1) levels in plasma of 40 AD patients and 39 controls with an enzyme-linked immunosorbent assay (ELISA). Homozygosity for haplotype rs3849266*C_rs2274567*A (CA/CA genotype) was associated with susceptibility to AD (OR = 2.94, p = 0.018). Patients presented higher sCR1 levels in plasma than controls (p = 0.038). Furthermore, patients that carry the rs2274567*G allele (p.1208Arg) presented higher sCR1 levels than A/A (p.1208His/His) homozygotes (p = 0.036). This is the first study to validate the association of CR1 polymorphisms with late-onset Alzheimer’s disease, as well as to evaluate sCR1 levels in a Latin American population. SNPs present in the regulatory and coding regions of this gene may be playing a key role in the observed association, probably by interfering in Aβ plaques clearance. Inhibition may be due to the increase in local sCR1 levels observed in patients, which may result from polymorphisms leading to larger isoforms of CR1 and/or structural alterations of the protein that makes it less functional, as well as increased vesiculation of the molecules.
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HORODESKY, ALINE;
CASTILHO-WESTPHAL, GISELA GERALDINE;
HUNGRIA, DIOGO BARBALHO;
NASCIMENTO, DURVAL;
RATTON, EDUARDO;
Vinícius Abilhoa;
Antonio Ostrensky Neto
Palavra-chave:
Composição;
ictiofauna;
monitoramento ambiental
Áreas do conhecimento:
Ciências Biológicas; Zoologia; Taxonomia dos Grupos Recentes
resumo ...
(en)
We evaluated fish diversity in three tributaries of the São Francisco River, one of the largest watercourses in Brazil. The study site is in the sub-basin of the Carinhanha River [Carinhanha, Cocos (I and II) and Itaguari Rivers], located in the South region of the Bahia state. These rivers are crossed by bridges of the federal highway BR-135. After sampling, upstream and downstream from each bridge, during drought and rain seasons, 3,520 specimens of fish (57 species, 21 families) were captured. The species with highest occurrence were Astyanax cf. taeniatus, Serrapinnus heterodon, Astyanax bimaculatus and Astyanax cf. rivularis. During drought season, the number of specimens captured was higher, leading to an increase of species dominance. In the rainy season, species diversity was higher with a greater distribution of individuals among species. The data indicate the maintenance of the fish faunal structure despite anthropogenic activities on the studied areas.
(pt)
O presente estudo fornece informações sobre a diversidade de peixes em três tributários do rio São Francisco, um dos mais importantes cursos d'água do Brasil e da América do Sul. A área de estudo, localizada na sub-bacia do rio Carinhanha (rios Carinhanha, Cocos segmento I e II e Itaguari), no estado da Bahia, envolve rios que estão em processo de interceptação pela rodovia federal BR-135. Amostragens realizadas tanto a jusante quanto a montante da rodovia, em períodos de seca e de chuva, levaram à captura de 3.520 exemplares (57 espécies; 21 famílias). As espécies de maior ocorrência foram Astyanax cf. taeniatus, Serrapinnus heterodon, Astyanax bimaculatus e Astyanax cf. rivularis. No período de seca houve maior número de capturas e dominância de espécies. No período chuvoso registrou-se maior diversidade de espécies e maior distribuição de indivíduos entre as espécies. Os dados indicam a manutenção da estrutura ictiofaunística, apesar das ações antrópicas sofridas pelos ambientes estudados.
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SOARES, IGOR PEDROSO;
OLIVEIRA, BRUNA A.C.;
BAAL, SUELEN C.S.;
Donatti, Lucélia;
INGBERMAN, MAX;
Beirão, Breno C.B.;
APPEL, MARCIA H.;
Fernandes, Luiz C.
Palavra-chave:
intestinal tissues;
fish oil;
colitis
Áreas do conhecimento:
Ciências Biológicas; Bioquímica dos Microorganismos; Enzimologia;
Ciências Biológicas; Fisiologia; Fisiologia Geral
resumo ...
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Bruno Carabelli;
Ferraz, Anete Curte;
Ana Marcia Delattre Zocolotti;
WALTRICK, ANA PAULA FARIAS;
ARAÚJO, GIULIA;
Suchecki, Deborah;
MACHADO, RICARDO BORGES;
Rizzo, Luiz Eduardo;
Silvio Marques Zanata;
ZANOVELI, JANAINA MENEZES
Palavra-chave:
LPS;
lipopolysaccharide;
depression;
IDO
Áreas do conhecimento:
Ciências Biológicas; Fisiologia; Neurociências;
Ciências Biológicas; Farmacologia; Neuropsicofarmacologia;
Ciências Biológicas; Farmacologia; Farmacologia Bioquímica e Molecular
resumo ...
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