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Pesquisa : B01.050.150.900.493.385.850 [Categoria DeCS]
Referências encontradas : 9 [refinar]
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  1 / 9 MEDLINE  
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[PMID]:26523497
[Au] Autor:Belanger CB; Vera-Chang MN; Moon TW; Midwood JD; Suski CD; Cooke SJ
[Ad] Endereço:Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental Science, Carleton University, Ottawa, ON Canada.
[Ti] Título:Seasonal variation in baseline and maximum whole-body glucocorticoid concentrations in a small-bodied stream fish independent of habitat quality.
[So] Source:Comp Biochem Physiol A Mol Integr Physiol;192:1-6, 2016 Feb.
[Is] ISSN:1531-4332
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Alterations to natural habitats are becoming more common due to changes in anthropogenic land use. As such, there is increasing interest in determining how wild animals adapt and respond to environmental stressors. The glucocorticoid (GC) stress response enables animals to react appropriately to environmental challenges but can be affected by many factors, two of which are habitat quality and time of year (i.e., season). This study tested whether baseline and maximum (stress-induced) whole-body cortisol concentrations varied in relation to habitat quality and season using wild central mudminnows (Umbra limi) collected from two connected streams differing in habitat quality in each of four seasons. Overall, baseline and maximum cortisol levels did not differ significantly between the two systems but there was evidence of a seasonal effect. Baseline cortisol levels in the fall and summer were significantly (P<0.01) lower than those in winter and spring and maximum cortisol levels in the summer were significantly lower (P<0.01) than those in the spring. Inconsistent with the prevailing paradigm, our results indicate that habitat quality does not always influence baseline GCs or the stress response. In contrast, baseline and maximum GCs in this species do vary seasonally. As such, seasonality should be considered in the interpretation of stress response data especially when using small-bodied stream fish as biological indicators.
[Mh] Termos MeSH primário: Ecossistema
Glucocorticoides/metabolismo
Estações do Ano
Umbridae/metabolismo
Qualidade da Água
[Mh] Termos MeSH secundário: Animais
Tamanho Corporal
Glucocorticoides/análise
Hidrocortisona/metabolismo
Rios
Estresse Fisiológico/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Glucocorticoids); WI4X0X7BPJ (Hydrocortisone)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:151225
[Lr] Data última revisão:
151225
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151103
[St] Status:MEDLINE


  2 / 9 MEDLINE  
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[PMID]:26393510
[Au] Autor:Takács P; Eros T; Specziár A; Sály P; Vitál Z; Ferincz Á; Molnár T; Szabolcsi Z; Bíró P; Csoma E
[Ad] Endereço:Balaton Limnological Institute, Centre for Ecological Research, MTA, Tihany, Hungary.
[Ti] Título:Population Genetic Patterns of Threatened European Mudminnow (Umbra krameri Walbaum, 1792) in a Fragmented Landscape: Implications for Conservation Management.
[So] Source:PLoS One;10(9):e0138640, 2015.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The European mudminnow (Umbra krameri) is a Middle Danubian endemic fish species, which is characterised by isolated populations living mainly in artificial habitats in the centre of its range, in the Carpathian Basin. For their long term preservation, reliable information is needed about the structure of stocks and the level of isolation. The recent distribution pattern, and the population genetic structure within and among regions were investigated to designate the Evolutionary Significant, Conservation and Management Units (ESUs, CUs, MUs) and to explore the conservation biological value of the shrinking populations. In total, eight microsatellite loci were studied in 404 specimens originating from eight regions. The results revealed a pronounced population structure, where strictly limited gene flow was detected among regions, as well as various strengths of connections within regions. Following the results of hierarchical structure analyses, two ESUs were supposed in the Carpathian Basin, corresponding to the Danube and Tisza catchments. Our results recommend designating the borders of CUs in an 80-90km range and 16 clusters should be set up as MUs for the 33 investigated populations. How these genetic findings can be used to better allocate conservation resources for the long term maintenance of the metapopulation structure of this threathened endemic fish is discussed.
[Mh] Termos MeSH primário: Conservação dos Recursos Naturais/métodos
Ecossistema
Espécies em Perigo de Extinção
Umbridae/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Animais
Europa (Continente)
Fluxo Gênico
Frequência do Gene
Variação Genética
Genética Populacional
Geografia
Desequilíbrio de Ligação
Repetições de Microssatélites/genética
Densidade Demográfica
Dinâmica Populacional
Rios
Umbridae/classificação
Umbridae/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1606
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150923
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0138640


  3 / 9 MEDLINE  
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[PMID]:25801689
[Au] Autor:Maric S; Snoj A; Sekulic N; Krpo-Cetkovic J; Sanda R; Jojic V
[Ad] Endereço:Institute of Zoology, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000, Belgrade, Serbia.
[Ti] Título:Genetic and morphological variability of the European mudminnow Umbra krameri (Teleostei, Umbridae) in Serbia and in Bosnia and Herzegovina, a basis for future conservation activities.
[So] Source:J Fish Biol;86(5):1534-48, 2015 May.
[Is] ISSN:1095-8649
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:As a basis for future conservation activities, the genetic and external body morphology variability of the European mudminnow Umbra krameri, a highly endangered fish species in Serbia and in Bosnia and Herzegovina, was determined for existing populations with the use of molecular markers (mitochondrial and microsatellite DNA) and geometric morphometric methods. Mitochondrial DNA cytochrome b gene analysis revealed two previously undescribed haplotypes: Da1 (the Lugomir population from the Danube River basin) and Sa1 (the Bakreni Batar and the Gromizelj populations from the Sava River system), with a corresponding genetic distance of 0·7%. Paired values of FST and DAS distances for microsatellite marker data show that the difference between the Danube and the Sava populations is seven to nine times higher than the difference between the populations within the Sava River system. Geometric morphometric analyses also support a clear separation of the Lugomir population from the Bakreni Batar and the Gromizelj populations. The analysis of the body shape variation, however, indicates a significant difference between the two genetically indistinguishable Sava populations. The observed genetic and phenetic relationships of the analysed mudminnow populations most probably represent a consequence of historical, geographical and ecological factors. These results will offer guidelines for future protection, conservation and sustainable management of this species in the region.
[Mh] Termos MeSH primário: Variação Genética
Umbridae/anatomia & histologia
Umbridae/genética
[Mh] Termos MeSH secundário: Animais
Bósnia e Herzegóvina
Conservação dos Recursos Naturais
Citocromos b/genética
DNA Mitocondrial/genética
Genética Populacional
Haplótipos
Repetições de Microssatélites
Análise de Sequência de DNA
Sérvia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA, Mitochondrial); 9035-37-4 (Cytochromes b)
[Em] Mês de entrada:1507
[Cu] Atualização por classe:151119
[Lr] Data última revisão:
151119
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150325
[St] Status:MEDLINE
[do] DOI:10.1111/jfb.12657


  4 / 9 MEDLINE  
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[PMID]:23991880
[Au] Autor:Sekulic N; Maric S; Galambos L; Radosevic D; Krpo-Cetkovic J
[Ad] Endereço:Institute for Nature Conservation of Serbia, Dr Ivana Ribara 91, 11070, Novi Beograd, Serbia.
[Ti] Título:New distribution data and population structure of the European mudminnow Umbra krameri in Serbia and Bosnia and Herzegovina.
[So] Source:J Fish Biol;83(3):659-66, 2013 Sep.
[Is] ISSN:1095-8649
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Seventy-six individuals of the European mudminnow Umbra krameri from two recent populations from Serbia (Bakreni Batar and Lugomir) and one from Bosnia and Herzegovina (Gromizelj) were analysed for habitat preferences and population structure. The population from Lugomir is a newly recorded population in Serbia. Besides this new record, it is noteworthy that all three studied locations are outside the currently known species distribution range limits.
[Mh] Termos MeSH primário: Distribuição Animal
Ecossistema
Umbridae
[Mh] Termos MeSH secundário: Animais
Bósnia e Herzegóvina
Conservação dos Recursos Naturais
Feminino
Masculino
Sérvia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1402
[Cu] Atualização por classe:151119
[Lr] Data última revisão:
151119
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:130903
[St] Status:MEDLINE
[do] DOI:10.1111/jfb.12183


  5 / 9 MEDLINE  
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[PMID]:22430935
[Au] Autor:Penders EJ; Spenkelink A; Hoogenboezem W; Rotteveel SG; Maas JL; Alink GM
[Ad] Endereço:RIWA, Association of Rhine Water Works, Nieuwegein, The Netherlands. eric.penders@hetwaterlaboratorium.nl
[Ti] Título:Genotoxic effects in the Eastern mudminnow (Umbra pygmaea) after prolonged exposure to River Rhine water, as assessed by use of the in vivo SCE and Comet assays.
[So] Source:Environ Mol Mutagen;53(4):304-10, 2012 May.
[Is] ISSN:1098-2280
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The production of drinking water from river water requires a certain minimal river water quality. The Association of River Rhine Water Works (RIWA), therefore, operates a monitoring network. In vitro mutagenicity studies have shown that the genotoxicity of the River Rhine water steadily decreased from 1981 until 2001. Compared to a study in 1978, a decrease in genotoxicity was also observed in an in vivo genotoxicity study in 2005, in which Eastern mudminnows (Umbra pygmaea) were exposed to River Rhine water, and gill cells were used for the Sister Chromatid Exchange (SCE) test and the Comet assay. In this 2005 study, the in vivo genotoxicity increased upon extending exposure of the fish from 3 to 11 days. Therefore, the objectives of this study were to investigate (i) whether new data corroborate that in vivo genotoxicity of River Rhine water is at present lower than in 1978, (ii) whether the Comet assay is a suitable alternative to the SCE assay, and (iii) whether further prolonged exposure results in a further increase in in vivo genotoxicity. The new data corroborate that in vivo genotoxicity of River Rhine water is at present lower than in 1978. The Comet assay is a useful addition but does not provide a substitute for the SCE endpoint in these in vivo genotoxicity studies. Prolonging the exposure time of Eastern mudminnows to River Rhine water from 11 to 42 days did not give a significant increase in SCEs and DNA damage (Comet assay) in gill cells.
[Mh] Termos MeSH primário: Dano ao DNA/genética
Monitoramento Ambiental/estatística & dados numéricos
Rios/química
Troca de Cromátide Irmã/efeitos dos fármacos
Umbridae/genética
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Ensaio Cometa
Monitoramento Ambiental/métodos
Brânquias/citologia
Brânquias/efeitos dos fármacos
Testes de Mutagenicidade/métodos
Países Baixos
Fatores de Tempo
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical)
[Em] Mês de entrada:1205
[Cu] Atualização por classe:120410
[Lr] Data última revisão:
120410
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:120321
[St] Status:MEDLINE
[do] DOI:10.1002/em.21687


  6 / 9 MEDLINE  
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[PMID]:17561437
[Au] Autor:Alink GM; Quik JT; Penders EJ; Spenkelink A; Rotteveel SG; Maas JL; Hoogenboezem W
[Ad] Endereço:Division of Toxicology, Wageningen University, Tuinlaan 5, 6703 HE Wageningen, The Netherlands. gerrit.alink@wur.nl
[Ti] Título:Genotoxic effects in the Eastern mudminnow (Umbra pygmaea L.) after exposure to Rhine water, as assessed by use of the SCE and Comet assays: a comparison between 1978 and 2005.
[So] Source:Mutat Res;631(2):93-100, 2007 Jul 28.
[Is] ISSN:0027-5107
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Surface water used for drinking-water preparation requires continuous monitoring for the presence of toxic compounds. For monitoring of genotoxic compounds fish models have been developed, such as the Eastern mudminnow (Umbra pygmaea L.) because of its clearly visible 22 meta-centric chromosomes. It was demonstrated in the late seventies that Rhine water was able to induce chromosome aberrations and sister chromatid exchange in this fish species. Although in vitro mutagenicity studies of the RIWA (Rhine Water Works, The Netherlands) have shown that the genotoxicity of the river Rhine steadily decreased during the last decades, there is still concern about the presence of some residual mutagenicity. In addition, in most studies the water samples have been tested only in in vitro test systems such as the Salmonella-microsome test. For this reason, and in order to be able to make a comparison with the water quality 27 years ago, a study was performed with the same experimental design as before in order to measure the effect of Rhine water on the induction of SCE in the Eastern mudminnow. As a new test system the single cell gel electrophoresis assay (Comet assay) was performed. Fish were exposed to Rhine water or to groundwater for 3 and 11 days in flow-through aquaria. Fish exposed for 11 days to Rhine water had a significantly higher number of SCE and an increased comet tail-length compared with control fish exposed to groundwater. After exposure for three days to Rhine water there was no difference in SCE and a slightly increased comet tail-length compared with the control. It was concluded that genotoxins are still present in the river Rhine, but that the genotoxic potential has markedly decreased compared with 27 years ago. Furthermore, the Comet assay appears to be a sensitive assay to measure the genotoxic potential of surface waters in fish.
[Mh] Termos MeSH primário: Ensaio Cometa
Mutagênicos/toxicidade
Troca de Cromátide Irmã
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Umbridae
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Mutagens); 0 (Water Pollutants, Chemical)
[Em] Mês de entrada:0709
[Cu] Atualização por classe:070625
[Lr] Data última revisão:
070625
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:070615
[St] Status:MEDLINE


  7 / 9 MEDLINE  
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[PMID]:16729708
[Au] Autor:Platta CS; Choudhury A
[Ad] Endereço:Division of Natural Sciences, St. Norbert College, DePere, Wisconsin 54115, USA.
[Ti] Título:Systematic position and relationships of Paracreptotrematina limi, based on partial sequences of 28S rRNA and cytochrome c oxidase subunit 1 genes.
[So] Source:J Parasitol;92(2):411-3, 2006 Apr.
[Is] ISSN:0022-3395
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Paracreptotrematina limi Amin and Myer, 1982 (Trematoda), an intestinal fluke specific to the mudminnow, Umbra limi, is conventionally classified within the papillose Allocreadiidae. Its unusual morphology (lack of identifiable vitellaria, large fully embryonated terminal eggs), assumptions of homology of its 2 atypical muscular oral 'papillae' (lobes) with those of the Bunoderinae, and its unknown life cycle make this classification tenuous. Previous phylogenetic analyses of the papillose allocreadiids, based on morphology, placed P. limi as a basal papillose allocreadiid. We tested this hypothesis with a phylogenetic analysis by using partial sequences of the 28S ribosomal RNA gene and the cytochrome c oxidase subunit I gene from several plagiorchiiform taxa, including reportedly related allocreadiids as well as selected species of Plagiorchiidae, Haematoloechidae, and Macroderoididae. Results of phylogenetic analyses of the 28S rRNA gene fragments by using parsimony criteria support the classification of P. limi as an allocreadiid and place it as a sister taxon to a clade with Allocreadium lobatum Wallin, 1909, Bunodera luciopercae (Müller, 1876) and Crepidostomum cooperi Hopkins, 1931, with Polylekithum ictaluri (Pearse, 1924) basal to all of them. Analysis of the cytochrome c oxidase subunit I gene sequence data from fewer taxa supports the placement of P. limi relative to 3 (A. lobatum, C. cooperi, and P. ictaluri) of the 4 allocreadiid taxa. These results also suggest that the previous conception of the papillose allocreadiids as a monophyletic assemblage that includes P. limi may require a reappraisal.
[Mh] Termos MeSH primário: Complexo IV da Cadeia de Transporte de Elétrons/genética
Filogenia
RNA Ribossômico 28S/genética
Trematódeos/classificação
[Mh] Termos MeSH secundário: Animais
Sequência de Bases
Sequência Consenso
Doenças dos Peixes/parasitologia
Dados de Sequência Molecular
Alinhamento de Sequência/veterinária
Trematódeos/enzimologia
Trematódeos/genética
Infecções por Trematódeos/parasitologia
Infecções por Trematódeos/veterinária
Umbridae/parasitologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (RNA, Ribosomal, 28S); EC 1.9.3.1 (Electron Transport Complex IV)
[Em] Mês de entrada:0606
[Cu] Atualização por classe:061115
[Lr] Data última revisão:
061115
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:060530
[St] Status:MEDLINE


  8 / 9 MEDLINE  
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[PMID]:15810561
[Au] Autor:Gerasev PI; Dmitrieva EV; Moshu AIa
[Ti] Título:[A description of a new species Gyrodactylus moldovicus sp. n. (Monogenea: Gyrodactylidae) from the European mudminnow Umbra krameri Walbaum, 1792 from the lower Dnester basin].
[So] Source:Parazitologiia;39(1):80-4, 2005 Jan-Feb.
[Is] ISSN:0031-1847
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:Gyrodactylus moldovicus sp. n. found on gills, body and in nasal cavities of the European mudminnow (Umbra krameri) differs from G. slovacicus Ergens, 1963 also living on the this host by bigger size of the body, anchors and marginal hooks; from G. cylindriformes Mueller et Van Cleave, 1932 living on the American mudminnow Umbra limi--by bigger size of the body; from G. limi Wood et Mizelle, 1957 also from U. limi--by the form of ventral and dorsal bars and form of marginal hooks. It differs from other freshwater gyrodactylids by special type of marginal hooks which have a hook-like end of the blade. Gyrodactylus moldovicus, G. slovacicus and G. limi have marginal hooks of quite different morphological types. By the morphology of anchors, ventral and sometimes dorsal bars and also morphology of cirrus, G. moldovicus is most related to three species from Cyprininae: G. stankovichi Ergens, 1970, G. longoacuminatus Zitnan, 1964 f. typica and G. shulmani Ling, 1962.
[Mh] Termos MeSH primário: Platelmintos/anatomia & histologia
Umbridae/parasitologia
[Mh] Termos MeSH secundário: Animais
Água Doce
Brânquias/parasitologia
Platelmintos/isolamento & purificação
Federação Russa
[Pt] Tipo de publicação:COMPARATIVE STUDY; ENGLISH ABSTRACT; JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:0508
[Cu] Atualização por classe:070307
[Lr] Data última revisão:
070307
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:050407
[St] Status:MEDLINE


  9 / 9 MEDLINE  
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[PMID]:12698003
[Au] Autor:Ráb P; Crossman EJ; Reed KM; Rábová M
[Ad] Endereço:Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Libechov, Czech Republic. rab@iapg.cas.cz
[Ti] Título:Chromosomal characteristics of ribosomal DNA in two extant species of North American mudminnows Umbra pygmaea and U. limi (Euteleostei: Umbridae).
[So] Source:Cytogenet Genome Res;98(2-3):194-8, 2002.
[Is] ISSN:1424-8581
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:The locations and chromosomal characteristics of ribosomal DNA (rDNA) sites in the karyotypes of two extant North American species of mudminnows, Umbra pygmaea and U. limi (2n = 22, NF = 44), were analyzed sequentially by conventional Giemsa staining, Ag staining, CMA(3) fluorescence and fluorescence in situ hybridization (FISH). The nucleolar organizer regions (NORs) were located in the fourth chromosomal pair in both species (pericentromeric region in U. pygmaea and subtelomeric in U. LIMI). These sites were strongly CMA(3)-positive suggesting that the rDNA sites in these species are associated with GC-rich DNA. FISH with a rDNA probe gave consistently positive signals in the same regions detected by Ag-staining and CMA(3)-fluorescence. However, both species also had additional CMA(3)-positive/Ag-negative heterochromatic blocks at pericentrometric regions of several chromosomal pairs (three in U. pygmaea and five in U. limi). FISH revealed additional rDNA clusters in both species. It is hypothesized that a paracentric inversion of the chromosome arm carrying the NORs might be one of the rearrangements differentiating the karyotypes of two North American species. The presence of additional rDNA sites is indicative of more complex rearrangements. The pericentromeric NOR phenotype of Umbra pygmaea is similar to that seen in U. krameri and in the distantly related genus Esox.
[Mh] Termos MeSH primário: Cromossomos
DNA Ribossômico/genética
Umbridae/genética
[Mh] Termos MeSH secundário: Animais
Bandeamento Cromossômico
Mapeamento Cromossômico
Cromossomos/ultraestrutura
Hibridização in Situ Fluorescente
Cariotipagem
América do Norte
Região Organizadora do Nucléolo
Coloração pela Prata
Umbridae/classificação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (DNA, Ribosomal)
[Em] Mês de entrada:0305
[Cu] Atualização por classe:171101
[Lr] Data última revisão:
171101
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:030417
[St] Status:MEDLINE



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