Base de dados : MEDLINE
Pesquisa : G05.815 [Categoria DeCS]
Referências encontradas : 8478 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 848 ir para página                         

  1 / 8478 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29216900
[Au] Autor:Ribas L; Vanezis K; Imués MA; Piferrer F
[Ad] Endereço:Institut de Ciències del Mar, Consejo Superior de Investigaciones Científicas (CSIC), Passeig Marítim, 37-45, 08003, Barcelona, Spain.
[Ti] Título:Treatment with a DNA methyltransferase inhibitor feminizes zebrafish and induces long-term expression changes in the gonads.
[So] Source:Epigenetics Chromatin;10(1):59, 2017 12 08.
[Is] ISSN:1756-8935
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The role of epigenetic modifications such as DNA methylation during vertebrate sexual development is far from being clear. Using the zebrafish model, we tested the effects of one of the most common DNA methyltransferase (dnmt) inhibitor, 5-aza-2'-deoxycytidine (5-aza-dC), which is approved for the treatment of acute myeloid leukaemia and is under active investigation for the treatment of solid tumours. Several dose-response experiments were carried out during two periods, including not only the very first days of development (0-6 days post-fertilization, dpf), as done in previous studies, but also, and as a novelty, the period of gonadal development (10-30 dpf). RESULTS: Early treatment with 5-aza-dC altered embryonic development, delayed hatching and increased teratology and mortality, as expected. The most striking result, however, was an increase in the number of females, suggesting that alterations induced by 5-aza-dC treatment can affect sexual development as well. Results were confirmed when treatment coincided with gonadal development. In addition, we also found that the adult gonadal transcriptome of 5-aza-dC-exposed females included significant changes in the expression of key reproduction-related genes (e.g. cyp11a1, esr2b and figla), and that several pro-female-related pathways such as the Fanconi anaemia or the Wnt signalling pathways were downregulated. Furthermore, an overall inhibition of genes implicated in epigenetic regulatory mechanisms (e.g. dnmt1, dicer, cbx4) was also observed. CONCLUSIONS: Taken together, our results indicate that treatment with a DNA methylation inhibitor can also alter the sexual development in zebrafish, with permanent alterations of the adult gonadal transcriptome, at least in females. Our results show the importance of DNA methylation for proper control of sexual development, open new avenues for the potential control of sex ratios in fish (aquaculture, population control) and call attention to possibly hidden long-term effects of dnmt therapy when used, for example, in the treatment of prepuberal children affected by some types of cancer.
[Mh] Termos MeSH primário: Metilases de Modificação do DNA/antagonistas & inibidores
Inibidores Enzimáticos/farmacologia
Feminização/induzido quimicamente
Ovário/efeitos dos fármacos
Peixe-Zebra/embriologia
[Mh] Termos MeSH secundário: Animais
Azacitidina/análogos & derivados
Azacitidina/farmacologia
Relação Dose-Resposta a Droga
Feminino
Masculino
Ovário/metabolismo
Razão de Masculinidade
Transcriptoma
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Enzyme Inhibitors); 776B62CQ27 (decitabine); EC 2.1.1.- (DNA Modification Methylases); M801H13NRU (Azacitidine)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180310
[Lr] Data última revisão:
180310
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171209
[St] Status:MEDLINE
[do] DOI:10.1186/s13072-017-0168-7


  2 / 8478 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28858705
[Au] Autor:Biandolino F; Parlapiano I; Faraponova O; Prato E
[Ad] Endereço:CNR-IAMC, Institute for Coastal Marine Environment, Taranto, Italy. Electronic address: francesca.biandolino@iamc.cnr.it.
[Ti] Título:Effects of short- and long-term exposures to copper on lethal and reproductive endpoints of the harpacticoid copepod Tigriopus fulvus.
[So] Source:Ecotoxicol Environ Saf;147:327-333, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The long-term exposure provides a realistic measurement of the effects of toxicants on aquatic organisms. The harpacticoid copepod Tigriopus fulvus has a wide geographical distribution and is considered as an ideal model organism for ecotoxicological studies for its good sensitivity to different toxicants. In this study, acute, sub-chronic and chronic toxicity tests based on lethal and reproductive responses of Tigriopus fulvus to copper were performed. The number of moults during larval development was chosen as an endpoint for sub-chronic test. Sex ratio, inhibitory effect on larval development, hatching time, fecundity, brood number, nauplii/brood, total newborn production, etc, were calculated in the chronic test (28d). Lethal effect of copper to nauplii showed the LC50-48h of 310 ± 72µgCu/L (mean ± sd). It was observed a significant inhibition of larval development at sublethal copper concentrations, after 4 and 7 d. After 4d, the EC50 value obtained for the endpoint in "moult naupliar reduction" was of 55.8 ± 2.5µgCu/L (mean ± sd). The EC50 for the inhibition of naupliar development into copepodite stage, was of 21.7 ± 4.4µgCu/L (mean ± sd), after 7 days. Among the different traits tested, copper did not affect sex ratio and growth, while fecundity and total nauplii production were the most sensitive endpoints. The reproductive endpoints offer the advantage of being detectable at very low pollutant concentrations.
[Mh] Termos MeSH primário: Copépodes/efeitos dos fármacos
Cobre/toxicidade
Monitoramento Ambiental/métodos
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Copépodes/crescimento & desenvolvimento
Determinação de Ponto Final
Fertilidade/efeitos dos fármacos
Dose Letal Mediana
Reprodução/efeitos dos fármacos
Razão de Masculinidade
Fatores de Tempo
Testes de Toxicidade Aguda
Testes de Toxicidade Crônica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 789U1901C5 (Copper)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170901
[St] Status:MEDLINE


  3 / 8478 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29478635
[Au] Autor:Chen J; Meng T; Li Y; Gao K; Qin Z
[Ad] Endereço:State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: 13070171175@163.com.
[Ti] Título:Effects of triclosan on gonadal differentiation and development in the frog Pelophylax nigromaculatus.
[So] Source:J Environ Sci (China);64:157-165, 2018 Feb.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Previous studies have reported that triclosan (TCS) could possess an androgenic activity. We aimed to investigate the effects of TCS on gonadal differentiation and development in the frog Pelophylax nigromaculatus, a sensitive amphibian species to androgenic chemicals. P. nigromaculatus tadpoles at stage 24 were exposed to TCS (3, 30, and 300nmol/L) to stage 46 in a semi-static exposure system. At the end of exposure, gonadal morphology and histology, sex ratio and gonadal expression of sex-biased genes were examined in P. nigromaculatus. In each TCS treatment group, we found several individuals whose gonads exhibited morphological and/or histological abnormalities. Gonadal histological abnormalities were characterized by few oocytes and many somatic cells. Although the percentage of the individuals with abnormal gonads was low (7.8%) among all animals treated with TCS, statistical test revealed the sex ratios in the 3 and 300nmol/L TCS treatment groups were significantly different from the solvent control. In the 30nmol/L TCS treatment group, abnormal gonads were also observed, although the sex ratio was not changed compared with the solvent control, which was possibly due to the smaller sample size in this group. In all the TCS treatment groups, the sex ratios were not obviously male-biased, but the expression levels of some sex-biased genes were significantly altered by TCS. Altogether, our results suggest that TCS, even at environmentally relevant concentrations, could disrupt gonadal differentiation and development in P. nigromaculatus, but we are not sure whether the disrupting effects were associated with masculinization or feminization.
[Mh] Termos MeSH primário: Ranidae/fisiologia
Testículo/efeitos dos fármacos
Triclosan/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Diferenciação Celular
Larva/fisiologia
Masculino
Metamorfose Biológica/efeitos dos fármacos
Razão de Masculinidade
Testículo/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 4NM5039Y5X (Triclosan)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180301
[Lr] Data última revisão:
180301
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180227
[St] Status:MEDLINE


  4 / 8478 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29338023
[Au] Autor:Alesina A; Giuliano P; Nunn N
[Ad] Endereço:Department of Economics, Harvard University, Cambridge, MA, United States of America.
[Ti] Título:Traditional agricultural practices and the sex ratio today.
[So] Source:PLoS One;13(1):e0190510, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:We study the historical origins of cross-country differences in the male-to-female sex ratio. Our analysis focuses on the use of the plough in traditional agriculture. In societies that did not use the plough, women tended to participate in agriculture as actively as men. By contrast, in societies that used the plough, men specialized in agricultural work, due to the physical strength needed to pull the plough or control the animal that pulls it. We hypothesize that this difference caused plough-using societies to value boys more than girls. Today, this belief is reflected in male-biased sex ratios, which arise due to sex-selective abortion or infanticide, or gender-differences in access to family resources, which results in higher mortality rates for girls. Testing this hypothesis, we show that descendants of societies that traditionally practiced plough agriculture today have higher average male-to-female sex ratios. We find that this effect systematically increases in magnitude and statistical significance as one looks at older cohorts. Estimates using instrumental variables confirm our findings from multivariate OLS analysis.
[Mh] Termos MeSH primário: Agricultura
Razão de Masculinidade
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Masculino
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180117
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190510


  5 / 8478 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27775172
[Au] Autor:Favre A; Widmer A; Karrenberg S
[Ad] Endereço:Plant Ecological Genetics, ETH Zurich, Institute of Integrative Biology, Universitätstrasse 16, 8092, Zurich, Switzerland.
[Ti] Título:Differential adaptation drives ecological speciation in campions (Silene): evidence from a multi-site transplant experiment.
[So] Source:New Phytol;213(3):1487-1499, 2017 Feb.
[Is] ISSN:1469-8137
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In order to investigate the role of differential adaptation for the evolution of reproductive barriers, we conducted a multi-site transplant experiment with the dioecious sister species Silene dioica and S. latifolia and their hybrids. Crosses within species as well as reciprocal first-generation (F ) and second-generation (F ) interspecific hybrids were transplanted into six sites, three within each species' habitat. Survival and flowering were recorded over 4 yr. At all transplant sites, the local species outperformed the foreign species, reciprocal F hybrids performed intermediately and F hybrids underperformed in comparison to F hybrids (hybrid breakdown). Females generally had slightly higher cumulative fitness than males in both within- and between-species crosses and we thus found little evidence for Haldane's rule acting on field performance. The strength of selection against F and F hybrids as well as hybrid breakdown increased with increasing strength of habitat adaptation (i.e. the relative fitness difference between the local and the foreign species) across sites. Our results suggest that differential habitat adaptation led to ecologically dependent post-zygotic reproductive barriers and drives divergence and speciation in this Silene system.
[Mh] Termos MeSH primário: Adaptação Fisiológica
Ecossistema
Especiação Genética
Silene/genética
Silene/fisiologia
[Mh] Termos MeSH secundário: Cruzamentos Genéticos
Flores/fisiologia
Aptidão Genética
Hibridização Genética
Modelos Biológicos
Razão de Masculinidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161025
[St] Status:MEDLINE
[do] DOI:10.1111/nph.14202


  6 / 8478 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27777265
[Au] Autor:Gellatly C; Petrie M
[Ad] Endereço:Institute of Health and Society, Newcastle University, Newcastle upon Tyne, UK.
[Ti] Título:Prenatal sex selection and female infant mortality are more common in India after firstborn and second-born daughters.
[So] Source:J Epidemiol Community Health;71(3):269-274, 2017 Mar.
[Is] ISSN:1470-2738
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The Indian sex ratio has become highly male-biased in recent decades. This may be attributed to prenatal sex selection (PSS) and excess female infant mortality. However, the question of whether these factors are related has not been adequately studied. Here we examine whether increased use of PSS may offset excess female infant mortality, by reducing the number of 'unwanted' daughters being born. METHODS: We analyse the National Family Health Survey (NHFS) data sets for India, which contain nationally representative samples of birth histories for women aged 15-49, interviewed in 1992-1993, 1998-1999 and 2005-2006. We test for missing female births at the second and third birth order, by analysis of the frequencies of sibling sex combinations, and examine the mortality differential between male and female infants, controlling for household wealth and sex(es) of older siblings. RESULTS: PSS was used most in wealthier households at the second and third birth order, when the firstborn, or firstborn and second-born, siblings were female. Having preceding female siblings was a significant risk factor for female infant mortality, but was not correlated with household wealth. CONCLUSIONS: PSS and female infant mortality increase with the presence of older female siblings, yet we find no evidence that increasing use of PSS prevents female infant mortality, because PSS and the proportion of female infant mortality attributable to having older sisters increased over the study period. Increased pressure on higher birth order females caused by the trend towards smaller family sizes may explain this.
[Mh] Termos MeSH primário: Mortalidade Infantil
Núcleo Familiar
Pré-Seleção do Sexo
[Mh] Termos MeSH secundário: Adolescente
Adulto
Ordem de Nascimento
Feminino
Seres Humanos
Índia
Lactente
Recém-Nascido
Meia-Idade
Fatores de Risco
Razão de Masculinidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180208
[Lr] Data última revisão:
180208
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161026
[St] Status:MEDLINE
[do] DOI:10.1136/jech-2016-207489


  7 / 8478 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29362783
[Ti] Título:Predetermination of Sex.
[So] Source:JAMA;319(4):413, 2018 01 23.
[Is] ISSN:1538-3598
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Drosophila melanogaster/genética
Processos de Determinação Sexual
[Mh] Termos MeSH secundário: Animais
Pesquisa Biomédica/história
Drosophila melanogaster/fisiologia
Feminino
Genótipo
História do Século XX
Seres Humanos
Masculino
Fenômenos Reprodutivos Fisiológicos
Cromossomos Sexuais
Razão de Masculinidade
[Pt] Tipo de publicação:CLASSICAL ARTICLE; HISTORICAL ARTICLE; JOURNAL ARTICLE
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180131
[Lr] Data última revisão:
180131
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:180125
[St] Status:MEDLINE
[do] DOI:10.1001/jama.2017.12215


  8 / 8478 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29236723
[Au] Autor:Ververs C; van Zijll Langhout M; Hostens M; Otto M; Govaere J; Durrant B; Van Soom A
[Ad] Endereço:Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan, 9820 Merelbeke, Belgium.
[Ti] Título:Reproductive performance parameters in a large population of game-ranched white rhinoceroses (Ceratotherium simum simum).
[So] Source:PLoS One;12(12):e0187751, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The population of free-roaming white rhinoceroses (Ceratotherium simum) is under serious threat. Captive breeding of this species is therefore becoming more important, but this is challenging and often not successful. Obtaining reproductive reference values is a crucial aspect of improving these breeding results. In this study performed between 2008 and 2016, reproductive performance was analysed in 1,354 animals kept in a 8000 hectares game-ranched environment. Descriptive statistics of this captive population showed an average annual herd growth (%) of 7 .0±0.1 (min -9 -max 15). Average calving rates were calculated as an annual calving rate of 20% and biennial calving rate of 37% adult females calving per year. Females had a median age of 83.2 months at first calving (IQR 72.9-110.7) and inter-calving intervals of 29.2 (IQR 24.6-34.8) months. Furthermore, translocations of animals did not interfere with reproductive success in terms of inter-calving periods or age at first calving. Multivariate models showed a clear seasonal calving pattern with a significant increase of the number of calvings during December-April when compared to April-December. Our results did not show any significant skewed progeny sex ratios. Weather observations showed no significant influence of rain or season on sex ratios of the calves.
[Mh] Termos MeSH primário: Perissodáctilos/fisiologia
[Mh] Termos MeSH secundário: Animais
Feminino
Masculino
Perissodáctilos/crescimento & desenvolvimento
Reprodução
Estações do Ano
Razão de Masculinidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180104
[Lr] Data última revisão:
180104
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171214
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0187751


  9 / 8478 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28452079
[Au] Autor:Li Y; Akimoto S
[Ad] Endereço:Department of Ecology and Systematics, Graduate School of Agriculture, Hokkaido University, Sapporo, Japan.
[Ti] Título:Frequency-dependent selection acting on the widely fluctuating sex ratio of the aphid Prociphilus oriens.
[So] Source:J Evol Biol;30(7):1347-1360, 2017 Jul.
[Is] ISSN:1420-9101
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo:Frequency-dependent selection is a fundamental principle of adaptive sex ratio evolution in all sex ratio theories but has rarely been detected in the wild. Through long-term censuses, we confirmed large fluctuations in the population sex ratio of the aphid Prociphilus oriens and detected frequency-dependent selection acting on these fluctuations. Fluctuations in the population sex ratio were partly attributable to climatic factors during the growing season. Climatic factors likely affected the growth conditions of host plants, which in turn led to yearly fluctuations in maternal conditions and sex ratios. In the process of frequency-dependent selection, female proportion higher or lower than ca. 60% was associated with a reduction or increase in female proportion, respectively, the next year. The rearing of aphid clones in the laboratory indicated that mothers of each clone produced an increasing number of females as maternal size increased. However, the mean male number was not related to maternal size, but varied largely among clones. Given genetic variance in the ability to produce males among clones, selection should favour clones that can produce more numerous males in years with a high female proportion. Population-level sex allocation to females was on average 71%-73% for three localities and more female-biased when maternal conditions were better. This tendency was accounted for by the hypothesis of competition among foundresses rather than the hypothesis of local mate competition. We conclude that despite consistent operation of frequency-dependent selection, the sex ratio continues to fluctuate because environmental conditions always push it away from equilibrium.
[Mh] Termos MeSH primário: Afídeos
Meio Ambiente
Razão de Masculinidade
[Mh] Termos MeSH secundário: Animais
Tamanho Corporal
Feminino
Variação Genética
Masculino
Seleção Genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171228
[Lr] Data última revisão:
171228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE
[do] DOI:10.1111/jeb.13107


  10 / 8478 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28981550
[Au] Autor:Hernández-Orts JS; Brandão M; Georgieva S; Raga JA; Crespo EA; Luque JL; Aznar FJ
[Ad] Endereço:Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos Almirante Storni (CIMAS-CCT CONICET-CENPAT) y Escuela Superior de Ciencias Marinas (ESCiMar), Universidad Nacional del Comahue, San Antonio Oeste, Río Negro, Argentina.
[Ti] Título:From mammals back to birds: Host-switch of the acanthocephalan Corynosoma australe from pinnipeds to the Magellanic penguin Spheniscus magellanicus.
[So] Source:PLoS One;12(10):e0183809, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Trophically-transmitted parasites are regularly exposed to potential new hosts through food web interactions. Successful colonization, or switching, to novel hosts, occur readily when 'donor' and 'target' hosts are phylogenetically related, whereas switching between distantly related hosts is rare and may result from stochastic factors (i.e. rare favourable mutations). This study investigates a host-switching event between a marine acanthocephalan specific to pinnipeds that is apparently able to reproduce in Magellanic penguins Spheniscus magellanicus from Brazil. Detailed analysis of morphological and morphometrical data from acanthocephalans from penguins indicates that they belong to Corynosoma australe Johnston, 1937. Partial fragments of the 28S rRNA and mitochondrial cox1 genes were amplified from isolates from penguins and two pinniped species (i.e. South American sea lion Otaria flavescens and South American fur seal Arctocephalus australis) to confirm this identification. Infection parameters clearly differ between penguins and the two pinniped species, which were significantly lower in S. magellanicus. The sex ratio of C. australe also differed between penguins and pinnipeds; in S. magellanicus was strongly biased against males, while in pinnipeds it was close to 1:1. Females of C. australe from O. flavescens were smaller than those from S. magellanicus and A. australis. However, fecundity (i.e. the proportion of fully developed eggs) was lower and more variable in females collected from S. magellanicus. At first glance, the occurrence of reproductive individuals of C. australe in Magellanic penguins could be interpreted as an adaptive colonization of a novel avian host through favourable mutations. However, it could also be considered, perhaps more likely, as an example of ecological fitting through the use of a plesimorphic (host) resource, since the ancestors of Corynosoma infected aquatic birds.
[Mh] Termos MeSH primário: Acantocéfalos
Otárias/parasitologia
Interações Hospedeiro-Parasita/fisiologia
Leões-Marinhos/parasitologia
Spheniscidae/parasitologia
[Mh] Termos MeSH secundário: Animais
Ecologia
Feminino
Masculino
Filogenia
Razão de Masculinidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171022
[Lr] Data última revisão:
171022
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171006
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0183809



página 1 de 848 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde