Base de dados : MEDLINE
Pesquisa : G01.906.595 [Categoria DeCS]
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  1 / 213664 MEDLINE  
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[PMID]:29447185
[Au] Autor:Taylor GT; Ackerman JT; Shaffer SA
[Ad] Endereço:Department of Biological Sciences, San Jose State University, San Jose, California, United States of America.
[Ti] Título:Egg turning behavior and incubation temperature in Forster's terns in relation to mercury contamination.
[So] Source:PLoS One;13(2):e0191390, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Egg turning behavior is an important determinant of egg hatchability, but it remains relatively understudied. Here, we examined egg turning rates and egg temperatures in Forster's terns (Sterna forsteri). We used artificial eggs containing a data logger with a 3-D accelerometer, a magnetometer, and a temperature thermistor to monitor parental incubation behavior of 131 tern nests. Overall, adults turned their eggs an average (±SD) of 3.8 ± 0.8 turns h-1, which is nearly two times higher than that of other seabirds. Egg turning rates increased with nest initiation date. We also examined egg turning rates and egg temperatures in relation to egg mercury contamination. Mercury contamination has been shown to be associated with reduced egg hatchability, and we hypothesized that mercury may decrease egg hatchability via altered egg turning behavior by parents. Despite the high variability in egg turning rates among individuals, the rate of egg turning was not related to mercury concentrations in sibling eggs. These findings highlight the need for further study concerning the potential determinants of egg turning behavior.
[Mh] Termos MeSH primário: Comportamento Animal/fisiologia
Charadriiformes/fisiologia
Comportamento de Nidação/fisiologia
[Mh] Termos MeSH secundário: Animais
Comportamento Animal/efeitos dos fármacos
Charadriiformes/metabolismo
Ovos/envenenamento
Poluentes Ambientais
Mercúrio/efeitos adversos
Mercúrio/metabolismo
Intoxicação por Mercúrio/fisiopatologia
Temperatura Ambiente
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Water Pollutants, Chemical); FXS1BY2PGL (Mercury)
[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:180216
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191390


  2 / 213664 MEDLINE  
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[PMID]:29385204
[Au] Autor:Mayfield AB; Chen YJ; Lu CY; Chen CS
[Ad] Endereço:Khaled bin Sultan Living Oceans Foundation, Annapolis, MD, United States of America.
[Ti] Título:The proteomic response of the reef coral Pocillopora acuta to experimentally elevated temperatures.
[So] Source:PLoS One;13(1):e0192001, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Although most reef-building corals live near the upper threshold of their thermotolerance, some scleractinians are resilient to temperature increases. For instance, Pocillopora acuta specimens from an upwelling habitat in Southern Taiwan survived a nine-month experimental exposure to 30°C, a temperature hypothesized to induce stress. To gain a greater understanding of the molecular pathways underlying such high-temperature acclimation, the protein profiles of experimental controls incubated at 27°C were compared to those of conspecific P. acuta specimens exposed to 30°C for two, four, or eight weeks, and differentially concentrated proteins (DCPs) were removed from the gels and sequenced with mass spectrometry. Sixty unique DCPs were uncovered across both eukaryotic compartments of the P. acuta-dinoflagellate (genus Symbiodinium) mutualism, and Symbiodinium were more responsive to high temperature at the protein-level than the coral hosts in which they resided at the two-week sampling time. Furthermore, proteins involved in the stress response were more likely to be documented at different cellular concentrations across temperature treatments in Symbiodinium, whereas the temperature-sensitive host coral proteome featured numerous proteins involved in cytoskeletal structure, immunity, and metabolism. These proteome-scale data suggest that the coral host and its intracellular dinoflagellates have differing strategies for acclimating to elevated temperatures.
[Mh] Termos MeSH primário: Recifes de Corais
Proteômica
Temperatura Ambiente
[Mh] Termos MeSH secundário: Eletroforese em Gel Bidimensional
Espectrometria de Massas
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[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:180201
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0192001


  3 / 213664 MEDLINE  
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[PMID]:29370273
[Au] Autor:Sswat M; Stiasny MH; Jutfelt F; Riebesell U; Clemmesen C
[Ad] Endereço:GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany.
[Ti] Título:Growth performance and survival of larval Atlantic herring, under the combined effects of elevated temperatures and CO2.
[So] Source:PLoS One;13(1):e0191947, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In the coming decades, environmental change like warming and acidification will affect life in the ocean. While data on single stressor effects on fish are accumulating rapidly, we still know relatively little about interactive effects of multiple drivers. Of particular concern in this context are the early life stages of fish, for which direct effects of increased CO2 on growth and development have been observed. Whether these effects are further modified by elevated temperature was investigated here for the larvae of Atlantic herring (Clupea harengus), a commercially important fish species. Over a period of 32 days, larval survival, growth in size and weight, and instantaneous growth rate were assessed in a crossed experimental design of two temperatures (10°C and 12°C) with two CO2 levels (400 µatm and 900 µatm CO2) at food levels mimicking natural levels using natural prey. Elevated temperature alone led to increased swimming activity, as well as decreased survival and instantaneous growth rate (Gi). The comparatively high sensitivity to elevated temperature in this study may have been influenced by low food levels offered to the larvae. Larval size, Gi and swimming activity were not affected by CO2, indicating tolerance of this species to projected "end of the century" CO2 levels. A synergistic effect of elevated temperature and CO2 was found for larval weight, where no effect of elevated CO2 concentrations was detected in the 12°C treatment, but a negative CO2 effect was found in the 10°C treatment. Contrasting CO2 effects were found for survival between the two temperatures. Under ambient CO2 conditions survival was increased at 12°C compared to 10°C. In general, CO2 effects were minor and considered negligible compared to the effect of temperature under these mimicked natural food conditions. These findings emphasize the need to include biotic factors such as energy supply via prey availability in future studies on interactive effects of multiple stressors.
[Mh] Termos MeSH primário: Dióxido de Carbono/metabolismo
Peixes/crescimento & desenvolvimento
Larva/crescimento & desenvolvimento
Temperatura Ambiente
[Mh] Termos MeSH secundário: Animais
Mudança Climática
Natação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
142M471B3J (Carbon Dioxide)
[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:180126
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191947


  4 / 213664 MEDLINE  
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[PMID]:29367488
[Au] Autor:Autthanit C; Jongsomjit B
[Ad] Endereço:Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University.
[Ti] Título:Production of Ethylene through Ethanol Dehydration on SBA-15 Catalysts Synthesized by Sol-gel and One-step Hydrothermal Methods.
[So] Source:J Oleo Sci;67(2):235-243, 2018 Feb 01.
[Is] ISSN:1347-3352
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:The present work deals with the catalytic performance of SBA-15 supported catalysts in the gas phase catalytic dehydration of ethanol in the temperature range of 200 to 400°C. The SBA-15 support was incorporated on a zirconium (Zr) and bimetal of zirconium and lanthanum (Zr-La) prepared by sol-gel (SG) and hydrothermal (HT) methods. The catalysts were characterized by means of N physisorption, SEM/EDX, and NH -TPD. The experimental results demonstrated that the Zr-La/SBA-15-HT exhibited the highest catalytic activity. Ethanol conversion and ethylene selectivity were found to increase with increased reaction temperature. The best catalytic results were achieved for Zr-La/SBA-15-HT indicating values of ethanol conversion and ethylene yield of ca. 84% and 80%, respectively at 400°C. The most important parameter influencing their catalytic properties appears to be the interaction between metal and support depending on different methods. The metal dispersion inside the siliceous matrix of SBA-15 has a direct influence on their surface acidity. Meanwhile, the performance of these SBA-15 supported catalysts in ethanol dehydration is also related with the alteration of surface acidity caused by the introduction of Zr and Zr-La.
[Mh] Termos MeSH primário: Química Orgânica/métodos
Etanol/química
Etilenos/síntese química
Dióxido de Silício/química
[Mh] Termos MeSH secundário: Catálise
Dessecação
Lantânio/química
Temperatura Ambiente
Zircônio/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ethylenes); 0 (SBA-15); 3K9958V90M (Ethanol); 6I3K30563S (Lanthanum); 7631-86-9 (Silicon Dioxide); 91GW059KN7 (ethylene); C6V6S92N3C (Zirconium)
[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:180126
[St] Status:MEDLINE
[do] DOI:10.5650/jos.ess17167


  5 / 213664 MEDLINE  
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[PMID]:29367487
[Au] Autor:Lin Y; Xie X; Yuan B; Fu J; Liu L; Tian H; Chen T; He D
[Ad] Endereço:College of Food Science and Engineering, Wuhan polytechnic University.
[Ti] Título:Optimization of Enzymatic Cell Disruption for Improving Lipid Extraction from Schizochytrium sp. through Response Surface Methodology.
[So] Source:J Oleo Sci;67(2):215-224, 2018 Feb 01.
[Is] ISSN:1347-3352
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:This study is aimed to explore the optimal conditions of cell disruption in the extraction algae oil process, using alkaline protease to disrupt cell of Schizochytrium sp. to extract oil in this paper. The effects of enzymatic lysis temperature, enzymatic lysis time, enzyme dosage and pH value on oil yield and DHA yield were studied. Through the combination of single factor test and response surface design, the optimal cell disruption conditions were screened out. The fatty acid composition of algal oil was analyzed by gas chromatography-massspectrometry (GC-MS). The results showed that when the conditions were: enzymatic lysis temperature 55°C, enzymatic lysis time 9 h, enzyme dosage 3% of biomass and pH 8,oil yield and DHA yield reached the highest 14.52 g/L and 7.12 g/L, respectively. When the strains were cultured in 50 L fermentor, oil yield reached 26.27 g/L and DHA yield reached 12.89 g/L. They were 1.81 times higher than that in shake-flask cultivation. The optimization experiment provides the basis for the industrial production of Schizochytrium sp.
[Mh] Termos MeSH primário: Proteínas de Bactérias
Endopeptidases
Extração Líquido-Líquido/métodos
Óleos/isolamento & purificação
Estramenópilas/química
[Mh] Termos MeSH secundário: Ácidos Graxos/análise
Cromatografia Gasosa-Espectrometria de Massas
Concentração de Íons de Hidrogênio
Óleos/química
Estramenópilas/citologia
Temperatura Ambiente
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Fatty Acids); 0 (Oils); EC 3.4.- (Endopeptidases); EC 3.4.99.- (alkaline protease)
[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:180126
[St] Status:MEDLINE
[do] DOI:10.5650/jos.ess17166


  6 / 213664 MEDLINE  
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[PMID]:29367481
[Au] Autor:Chanwattanakit J; Chavadej S
[Ad] Endereço:The Petroleum and Petrochemical College, Chulalongkorn University.
[Ti] Título:Laundry Detergency of Solid Non-Particulate Soil Using Microemulsion-Based Formulation.
[So] Source:J Oleo Sci;67(2):187-198, 2018 Feb 01.
[Is] ISSN:1347-3352
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:Laundry detergency of solid non-particulate soil on polyester and cotton was investigated using a microemulsion-based formulation, consisting of an anionic extended surfactant (C -4PO-SO Na) and sodium mono-and di-methyl naphthalene sulfonate (SMDNS) as the hydrophilic linker, to provide a Winsor Type III microemulsion with an ultralow interfacial tension (IFT). In this work, methyl palmitate (palmitic acid methyl ester) having a melting point around 30°C, was used as a model solid non-particulate (waxy) soil. A total surfactant concentration of 0.35 wt% of the selected formulation (4:0.65 weight ratio of C -4PO-SO Na:SMDNS) with 5.3 wt% NaCl was able to form a middle phase microemulsion at a high temperature (40°C),which provided the highest oil removal level with the lowest oil redeposition and the lowest IFT, and was much higher than that with a commercial detergent or de-ionized water. Most of the detached oil, whether in liquid or solid state, was in an unsolubilized form. Hence, the dispersion stability of the detached oil droplets or solidified oil particles that resulted from the surfactant adsorption played an important role in the oil redeposition. For an oily detergency, the lower the system IFT, the higher the oil removal whereas for a waxy (non-particulate) soil detergency, the lower the contact angle, the higher the solidified oil removal. For a liquefied oil, the detergency mechanism was roll up and emulsification with dispersion stability, while that for the waxy soil (solid oil) was the detachment by wettability with dispersion stability.
[Mh] Termos MeSH primário: Detergentes/química
Lavanderia
Palmitatos
[Mh] Termos MeSH secundário: Fibra de Algodão
Emulsões
Interações Hidrofóbicas e Hidrofílicas
Material Particulado
Poliésteres
Tensão Superficial
Tensoativos
Temperatura Ambiente
Têxteis
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Detergents); 0 (Emulsions); 0 (Palmitates); 0 (Particulate Matter); 0 (Polyesters); 0 (Surface-Active Agents); DPY8VCM98I (methyl palmitate)
[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:180126
[St] Status:MEDLINE
[do] DOI:10.5650/jos.ess17135


  7 / 213664 MEDLINE  
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[PMID]:29367478
[Au] Autor:Sun M; Xu X; Zhang Q; Rui X; Wu J; Dong M
[Ad] Endereço:College of Food Science and Technology, Nanjing Agricultural University.
[Ti] Título:Ultrasonic-assisted Aqueous Extraction and Physicochemical Characterization of Oil from Clanis bilineata.
[So] Source:J Oleo Sci;67(2):151-165, 2018 Feb 01.
[Is] ISSN:1347-3352
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:Ultrasound-assisted aqueous extraction (UAAE) was used to extract oil from Clanis bilineata (CB), a traditional edible insect that can be reared on a large scale in China, and the physicochemical property and antioxidant capacity of the UAAE-derived oil (UAAEO) were investigated for the first time. UAAE conditions of CB oil was optimized using response surface methodology (RSM) and the highest oil yield (19.47%) was obtained under optimal conditions for ultrasonic power, extraction temperature, extraction time, and ultrasonic interval time at 400 W, 40°C, 50 min, and 2 s, respectively. Compared with Soxhlet extraction-derived oil (SEO), UAAEO had lower acid (AV), peroxide (PV) and p-anisidine values (PAV) as well as higher polyunsaturated fatty acids contents and thermal stability. Furthermore, UAAEO showed stronger antioxidant activities than those of SEO, according to DPPH radical scavenging and ß-carotene bleaching tests. Therefore, UAAE is a promising process for the large-scale production of CB oil and CB has a developing potential as functional oil resource.
[Mh] Termos MeSH primário: Fenômenos Químicos
Larva/química
Lepidópteros/química
Extração Líquido-Líquido/métodos
Óleos/química
Óleos/isolamento & purificação
Ultrassom
Água
[Mh] Termos MeSH secundário: Animais
Antioxidantes
Ácidos Graxos Insaturados/análise
Óleos/farmacologia
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antioxidants); 0 (Fatty Acids, Unsaturated); 0 (Oils); 059QF0KO0R (Water)
[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:180126
[St] Status:MEDLINE
[do] DOI:10.5650/jos.ess17108


  8 / 213664 MEDLINE  
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[PMID]:29346418
[Au] Autor:Collaco JM; Appel LJ; McGready J; Cutting GR
[Ad] Endereço:Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America.
[Ti] Título:The relationship of lung function with ambient temperature.
[So] Source:PLoS One;13(1):e0191409, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Lung function is complex trait with both genetic and environmental factors contributing to variation. It is unknown how geographic factors such as climate affect population respiratory health. OBJECTIVE: To determine whether ambient air temperature is associated with lung function (FEV1) in the general population. DESIGN/SETTING: Associations between spirometry data from two National Health and Nutrition Examination Survey (NHANES) periods representative of the U.S. non-institutionalized population and mean annual ambient temperature were assessed using survey-weighted multivariate regression. PARTICIPANTS/MEASUREMENTS: The NHANES III (1988-94) cohort included 14,088 individuals (55.6% female) and the NHANES 2007-12 cohort included 14,036 individuals (52.3% female), with mean ages of 37.4±23.4 and 34.4±21.8 years old and FEV1 percent predicted values of 99.8±15.8% and 99.2±14.5%, respectively. RESULTS: After adjustment for confounders, warmer ambient temperatures were associated with lower lung function in both cohorts (NHANES III p = 0.020; NHANES 2007-2012 p = 0.014). The effect was similar in both cohorts with a 0.71% and 0.59% predicted FEV1 decrease for every 10°F increase in mean temperature in the NHANES III and NHANES 2007-2012 cohorts, respectively. This corresponds to ~2 percent predicted difference in FEV1 between the warmest and coldest regions in the continental United States. CONCLUSIONS: In the general U.S. population, residing in regions with warmer ambient air temperatures was associated with lower lung function with an effect size similar to that of traffic pollution. Rising temperatures associated with climate change could have effects on pulmonary function in the general population.
[Mh] Termos MeSH primário: Ar
Volume Expiratório Forçado
Temperatura Ambiente
[Mh] Termos MeSH secundário: Adulto
Estudos de Coortes
Fatores de Confusão (Epidemiologia)
Feminino
Seres Humanos
Masculino
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL
[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:180119
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191409


  9 / 213664 MEDLINE  
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[PMID]:29279438
[Au] Autor:Ebitani M; Ebitani T
[Ad] Endereço:Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University.
[Ti] Título:[Rotational Isomers of Diphenhydramine].
[So] Source:Yakugaku Zasshi;138(3):417-424, 2018 Mar 01.
[Is] ISSN:1347-5231
[Cp] País de publicação:Japan
[La] Idioma:jpn
[Ab] Resumo: Diphenhydramine (DP), an antihistaminic agent, may become colored and daker or more fluorescent during storage. Herein, we spectroscopically examined the causes of this phenomenon under various DP storage conditions and durations. The infrared vibration-rotation spectrum shows multiple Gauche (G)-type conformers with different intramolecular n→π interaction strengths. The splitting pattern of the dimethylamino group protons in the H-NMR spectrum indicates that DP is mainly in the G-type with a small portion in the Trans (T)-type. The correlation between the red-shifted peak intensity in the UV•VIS absorbance spectrum and the coloring progression indicates a decreased intramolecular n→π interaction of the G-type under elevated temperature during storage. Enhanced fluorescence detected in the Excitation•Fluorescence spectrum demonstrates G-type (quenching) to T-type (fluorescent) conformation conversion, which is due to activated internal rotation of the dimethylamino group under elevated storage temperature and electronic excitation in the phenyl groups under light irradiation during storage. A signal detected in the ESR spectrum corresponds to the G-type charge transfer (CT) structure wherein part of the nonbonding electron pair on the N atom is intramolecularly redistributed to the phenyl groups. The CT structure presents the G-type quenching characteristics, whereas weak CT bonding corresponds to coloring. The results indicate that the quenching G-type is converted to T-type by heat or light to become color faded and bright with enhanced fluorescence and that T-type is reverted to G-type after storage under cool and dark conditions or by vacuum distillation to lose fluorescence.
[Mh] Termos MeSH primário: Difenidramina/química
Estabilidade de Medicamentos
Armazenamento de Medicamentos
Antagonistas dos Receptores Histamínicos/química
[Mh] Termos MeSH secundário: Cor
Espectroscopia de Ressonância de Spin Eletrônica
Fluorescência
Isomerismo
Luz
Espectroscopia de Ressonância Magnética
Conformação Molecular
Rotação
Espectrometria de Fluorescência
Espectrofotometria Infravermelho
Análise Espectral
Temperatura Ambiente
Vibração
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Histamine Antagonists); 8GTS82S83M (Diphenhydramine)
[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:171228
[St] Status:MEDLINE
[do] DOI:10.1248/yakushi.17-00175


  10 / 213664 MEDLINE  
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[PMID]:29202687
[Au] Autor:Kealy S; Beck R
[Ad] Endereço:Archaeology and Natural History, School of Culture, History and Language, College of Asia and the Pacific, Australian National University, Acton, ACT, Australia.
[Ti] Título:Total evidence phylogeny and evolutionary timescale for Australian faunivorous marsupials (Dasyuromorphia).
[So] Source:BMC Evol Biol;17(1):240, 2017 Dec 04.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The order Dasyuromorphia is a diverse radiation of faunivorous marsupials, comprising >80 modern species in Australia and New Guinea. It includes dasyurids, the numbat (the myrmecobiid Myrmecobius fasciatus) and the recently extinct thylacine (the thylacinid Thylacinus cyncocephalus). There is also a diverse fossil record of dasyuromorphians and "dasyuromorphian-like" taxa known from Australia. We present the first total evidence phylogenetic analyses of the order, based on combined morphological and molecular data (including a novel set of 115 postcranial characters), to resolve relationships and calculate divergence dates. We use this information to analyse the diversification dynamics of modern dasyuromorphians. RESULTS: Our morphology-only analyses are poorly resolved, but our molecular and total evidence analyses confidently resolve most relationships within the order, and are strongly congruent with recent molecular studies. Thylacinidae is the first family to diverge within the order, and there is strong support for four tribes within Dasyuridae (Dasyurini, Phascogalini, Planigalini and Sminthopsini). Among fossil taxa, Ankotarinja and Keeuna do not appear to be members of Dasyuromorphia, whilst Barinya and Mutpuracinus are of uncertain relationships within the order. Divergence dates calculated using total evidence tip-and-node dating are younger than both molecular node-dating and total evidence tip-dating, but appear more congruent with the fossil record and are relatively insensitive to calibration strategy. The tip-and-node divergence dates indicate that Dasyurini, Phascogalini and Sminthopsini began to radiate almost simultaneously during the middle-to-late Miocene (11.5-13.1 MYA; composite 95% HPD: 9.5-15.9 MYA); the median estimates for these divergences are shortly after a drop in global temperatures (the middle Miocene Climatic Transition), and coincide with a faunal turnover event in the mammalian fossil record of Australia. Planigalini radiated much later, during the latest Miocene to earliest Pliocene (6.5 MYA; composite 95% HPD: 4.4-8.9 MYA); the median estimates for these divergences coincide with an increase in grass pollen in the Australian palynological record that suggests the development of more open habitats, which are preferred by modern planigale species. CONCLUSIONS: Our results provide a phylogenetic and temporal framework for interpreting the evolution of modern and fossil dasyuromorphians, but future progress will require a much improved fossil record.
[Mh] Termos MeSH primário: Comportamento Alimentar
Marsupiais/classificação
Filogenia
[Mh] Termos MeSH secundário: Animais
Austrália
Teorema de Bayes
Temperatura Ambiente
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[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:171206
[St] Status:MEDLINE
[do] DOI:10.1186/s12862-017-1090-0



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