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[PMID]:28934713
[Au] Autor:Cacciatore F; Boscolo Brusà R; Noventa S; Antonini C; Moschino V; Formalewicz M; Gion C; Berto D; Gabellini M; Marin MG
[Ad] Endereço:ISPRA - Institute for Environmental Protection and Research, Loc. Brondolo, 30015 Chioggia, Italy. Electronic address: federica.cacciatore@isprambiente.it.
[Ti] Título:Imposex levels and butyltin compounds (BTs) in Hexaplex trunculus (Linnaeus, 1758) from the northern Adriatic Sea (Italy): Ecological risk assessment before and after the ban.
[So] Source:Ecotoxicol Environ Saf;147:688-698, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The aim of this study was to compare imposex and butyltin compounds (BTs) data, collected before and after the organotin ban in 2008, in order to assess temporal and spatial variation of the phenomenon, the decline of BT contamination, and the effects on Hexaplex trunculus population in the coastal area of the northern Adriatic Sea, close to the Venice Lagoon. Both in marine and in lagoon sites, the results obtained in 2013-2015 showed a significant decline in the incidence of imposex in respect to those from the 2002 survey. In 2002, lagoon samples exhibited Relative Penis Size Index (RPSI) higher than marine samples, whereas no differences were detected in the recent survey, when all RPSI values were below 0.6%. Vas Deference Sequence Index (VDSI) mean values were over 4 before the ban introduction and below this value after that, indicating more critical conditions for gastropod population in 2002 rather than in 2013-15. Percentage of sterile females was up to 69% in 2002, whilst in the more recent survey no sterile female was found. Range of BT concentrations in gastropods decreased from 252 to 579 to 16-31ng∑BT/g d.w. BT body burdens varied according to a gender dependant pattern, with higher concentrations observed in females than in males. A first attempt to propose a classification based on BT impact on H. trunculus, according to the Water Framework Directive, revealed that most sites were in Bad ecological status before the ban and attained a Poor/Moderate status after that.
[Mh] Termos MeSH primário: Transtornos do Desenvolvimento Sexual/induzido quimicamente
Monitoramento Ambiental/métodos
Gastrópodes/efeitos dos fármacos
Compostos de Trialquitina/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Carga Corporal (Radioterapia)
Feminino
Gastrópodes/metabolismo
Itália
Masculino
Mar Mediterrâneo
Medição de Risco
Água do Mar/química
Compostos de Trialquitina/metabolismo
Poluentes Químicos da Água/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Trialkyltin Compounds); 0 (Water Pollutants, Chemical); 4XDX163P3D (tributyltin)
[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:170922
[St] Status:MEDLINE


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[PMID]:29357381
[Au] Autor:Sala A
[Ad] Endereço:Italian National Research Council (CNR), Institute of Marine Sciences (ISMAR), Ancona, Italy.
[Ti] Título:Influence of tow duration on catch performance of trawl survey in the Mediterranean Sea.
[So] Source:PLoS One;13(1):e0191662, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The aim of this study was to assess the effect of tow duration on catch per unit of swept area (CPUE), trawl catch performance, and the proportion of the species caught in a trawl survey. Longer tows are expected to have a greater probability of catching species. An average of 26 species were caught in the first 30 minutes, whereas only about one additional species was caught in the next 30 minutes in longer tows. The shorter tows involved a decrement in catch weight for 11 of the 12 target species sampled, demonstrating that tow duration did affect catch per unit of swept area CPUE. The shorter tows were associated with a significant reduction of the overall CPUE in terms of weight of the main target species and of the total catch (circa 60%). The same strong reduction of around 70% was found in particular for European hake (Merluccius merluccius) and surmullet (Mullus spp) and 50% for Nephrops (Nephrops norvegicus). The shorter tows were less efficient in catching large-sized hake, surmullet, Nephrops, Atlantic horse mackerel (Trachurus trachurus), and poor cod (Trisopterus minutus), even though the difference was significant only for Nephrops. Regardless of the p-value statistic, these findings suggest that the continuity of survey time series would be severely impaired by changing tow duration. Further work is required to explore a way to reduce tow duration without reducing CPUE.
[Mh] Termos MeSH primário: Pesqueiros
Peixes
[Mh] Termos MeSH secundário: Animais
Tamanho Corporal
União Europeia
Pesqueiros/legislação & jurisprudência
Pesqueiros/estatística & dados numéricos
Peixes/anatomia & histologia
Peixes/fisiologia
Mar Mediterrâneo
Recursos Naturais
Densidade Demográfica
Especificidade da Espécie
Inquéritos e Questionários
Natação
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180123
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191662


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[PMID]:28521524
[Au] Autor:Roggatz CC; González-Wangüemert M; Pereira H; Vizetto-Duarte C; Rodrigues MJ; Barreira L; da Silva MM; Varela J; Custódio L
[Ad] Endereço:a Faculty of Sciences and Technology, Center of Marine Sciences (CCMAR) , University of Algarve , Faro , Portugal.
[Ti] Título:A first glance into the nutritional properties of the sea cucumber Parastichopus regalis from the Mediterranean Sea (SE Spain).
[So] Source:Nat Prod Res;32(1):116-120, 2018 Jan.
[Is] ISSN:1478-6427
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This work reports for the first time the nutritional profile, including proximate chemical composition, amino acids, fatty acids and minerals of Parastichopus regalis from the Mediterranean Sea (SE Spain). The studied species had a high moisture content, moderate protein and low lipid levels. The most abundant amino acids were glutamic acid, arginine and tyrosine. Polyunsaturated fatty acids, especially arachidonic acid, dominated the fatty acid profile. Iron, sodium, calcium and zinc were the most abundant mine rals. In general, P. regalis has a balanced nutritional quality suitable for human consumption.
[Mh] Termos MeSH primário: Aminoácidos/análise
Ácidos Graxos/análise
Minerais/análise
Valor Nutritivo
Pepinos-do-Mar/química
[Mh] Termos MeSH secundário: Animais
Ácidos Graxos Insaturados/análise
Mar Mediterrâneo
Espanha
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Amino Acids); 0 (Fatty Acids); 0 (Fatty Acids, Unsaturated); 0 (Minerals)
[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:170520
[St] Status:MEDLINE
[do] DOI:10.1080/14786419.2017.1331224


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[PMID]:28888791
[Au] Autor:Furfaro G; Salvi D; Mancini E; Mariottini P
[Ad] Endereço:Department of Sciences, University "Roma Tre", Viale G. Marconi 446, I-00146 Rome, Italy. Electronic address: giulia.furfaro@uniroma3.it.
[Ti] Título:A multilocus view on Mediterranean aeolid nudibranchs (Mollusca): Systematics and cryptic diversity of Flabellinidae and Piseinotecidae.
[So] Source:Mol Phylogenet Evol;118:13-22, 2018 Jan.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Recent molecular studies revealed high level of endemism and numerous cryptic species within opisthobranchs, with Mediterranean taxa clearly understudied. Here we used genetic data from both mitochondrial and nuclear gene fragments as well as morphological data from taxonomically relevant characters to investigate the phylogenetic relationships and systematics of Mediterranean taxa of the Flabellinidae and Piseinotecidae families. Phylogenetic analyses based on Bayesian and Maximum-Likelihood methods indicate that Flabellinidae and Pisenotecidae taxa and species within the genera Flabellina, Calmella and Piseinotecus do not form monophyletic clades. These results are supported by our morphological analyses which allowed the re-evaluation of the triseriate radula condition in Pisenotecidae and Calmella taxa and their inclusion in the genus Flabellina as Flabellina gaditanacomb. nov. (synonym of F. confusa), Flabellina gabiniereicomb. nov. and Flabellina cavolinicomb. nov. Species delimitation and barcoding gap analyses allowed uncovering cryptic species within Flabellina gracilis (Alder and Hancock, 1844), F. trophina (Bergh, 1890), F. verrucosa (M. Sars, 1829) and F. ischitana Hirano and Thompson, 1990, the latter with an Atlantic form which is under description. This study corroborates the relevance of combining molecular and morphological data from multiple populations and species in the assessment of nudibranch diversity and classification.
[Mh] Termos MeSH primário: Gastrópodes/classificação
[Mh] Termos MeSH secundário: Animais
Teorema de Bayes
Biodiversidade
Gastrópodes/anatomia & histologia
Gastrópodes/genética
Funções Verossimilhança
Mar Mediterrâneo
Filogenia
RNA Ribossômico 16S/química
RNA Ribossômico 16S/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Ribosomal, 16S)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170911
[St] Status:MEDLINE


  5 / 2744 MEDLINE  
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[PMID]:29324758
[Au] Autor:Cuadros A; Basterretxea G; Cardona L; Cheminée A; Hidalgo M; Moranta J
[Ad] Endereço:Instituto Español de Oceanografía (IEO), Estació d'Investigació Jaume Ferrer, Maó, Spain.
[Ti] Título:Settlement and post-settlement survival rates of the white seabream (Diplodus sargus) in the western Mediterranean Sea.
[So] Source:PLoS One;13(1):e0190278, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Survival during the settlement window is a limiting variable for recruitment. The survival is believed to be strongly determined by biological interactions and sea conditions, however it has been poorly investigated. We examined the settlement patterns related to relevant biotic and abiotic factors (i.e. Density-dependence, wind stress, wave height and coastal current velocity) potentially determining post-settler survival rates of a coastal necto-benthic fish of wide distribution in the Mediterranean and eastern Atlantic, the white seabream (Diplodus sargus). An observational study of the demography of juveniles of this species was carried out at six coves in Menorca Island (Balearic Islands, western Mediterranean). Three of the coves were located in the northern and wind exposed coast, at the Northeast (NE) side; while the other three were found along the southern and sheltered coast, at the Southwest (SW) side of the island. The settlement period extended from early May to late June and maximum juvenile densities at the sampling sites varied between 5 and 11 ind. m-1 with maximum values observed in late May simultaneously occurring in the two coasts. Our analysis of juvenile survival, based on the interpretation of the observed patters using an individual based model (IBM), revealed two stages in the size-mortality relationships. An initial density-dependent stage was observed for juveniles up to 20 mm TL, followed by a density independent stage when other factors dominated the survival at sizes > 20 mm TL. No significant environmental effects were observed for the small size class (<20mm TL). Different significant environmental effects affecting NE and SW coves were observed for the medium (20-30mm TL) and large (>30mm TL) size class. In the NE, the wind stress consistently affected the density of fish of 20-30 mm and >30 mm TL with a dome-shape effect with higher densities at intermediate values of wind stress and negative effect at the extremes. The best models applied in the SW coves showed a significant non-linear negative effect on fish density that was also consistent for both groups 20-30 mm and >30 mm TL. Higher densities were observed at low values of wave height in the two groups. Because of these variations, the number of juveniles present at the end of the period was unrelated to their initial density and average survival varied among locations. In consequence, recruitment was (1) primarily limited by denso-dependient procedures at settlement stage, and (2) by sea conditions at post-settlement, where extreme wave conditions depleted juveniles. Accordingly, regional hydrodynamic conditions during the settlement season produced significant impacts on the juvenile densities depending on their size and with contrasted effects in respectto cove orientation. The similar strength in larval supply between coves, in addition to the similar mean phenology for settlers in the north and south of the Island, suggests that all fish may come from the same parental reproductive pool. These factors should be taken into account when assessing relationships between settlers, recruits and adults of white seabream.
[Mh] Termos MeSH primário: Ecossistema
Dourada/fisiologia
[Mh] Termos MeSH secundário: Animais
Mar Mediterrâneo
Taxa de Sobrevida
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180206
[Lr] Data última revisão:
180206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180112
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190278


  6 / 2744 MEDLINE  
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[PMID]:28747531
[Au] Autor:Buba Y; van Rijn I; Blowes SA; Sonin O; Edelist D; DeLong JP; Belmaker J
[Ad] Endereço:School of Zoology, Tel Aviv University, 6997801 Tel Aviv, Israel hezibuba@mail.tau.ac.il.
[Ti] Título:Remarkable size-spectra stability in a marine system undergoing massive invasion.
[So] Source:Biol Lett;13(7), 2017 07.
[Is] ISSN:1744-957X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The Mediterranean Sea is an invasion hotspot, with non-indigenous species suspected to be a major driver behind community changes. We used size spectra, a reliable index of food web structure, to examine how the influx of Red Sea fishes into the Mediterranean Sea has impacted the indigenous species community. This is the first attempt to use changes in the size spectra to reveal the effect of biological invasions. We used data from trawl catches along Israel's shoreline spanning 20 years to estimate changes in the community size spectra of both indigenous and non-indigenous species. We found that the relative biomass of non-indigenous species increased over the 20 years, especially for small and large species, leading to a convergence with the indigenous species size spectra. Hence, the biomass of indigenous and non-indigenous species has become identical for all size classes, suggesting similar energetic constraints and sensitivities to fishing. However, over this time period the size spectrum of indigenous species has remained remarkably constant. This suggests that the wide-scale invasion of non-indigenous species into the Mediterranean may have had little impact on the community structure of indigenous species.
[Mh] Termos MeSH primário: Cadeia Alimentar
[Mh] Termos MeSH secundário: Animais
Ecossistema
Peixes
Oceano Índico
Mar Mediterrâneo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1712
[Cu] Atualização por classe:180204
[Lr] Data última revisão:
180204
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170728
[St] Status:MEDLINE


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[PMID]:27779617
[Au] Autor:Lopes Dos Santos A; Gourvil P; Tragin M; Noël MH; Decelle J; Romac S; Vaulot D
[Ad] Endereço:Sorbonne Universités, UPMC Université Paris 06, CNRS, UMR 7144 Station Biologique de Roscoff, Roscoff, France.
[Ti] Título:Diversity and oceanic distribution of prasinophytes clade VII, the dominant group of green algae in oceanic waters.
[So] Source:ISME J;11(2):512-528, 2017 02.
[Is] ISSN:1751-7370
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Prasinophytes clade VII is a group of pico/nano-planktonic green algae (division Chlorophyta) for which numerous ribosomal RNA (rRNA) sequences have been retrieved from the marine environment in the last 15 years. A large number of strains have also been isolated but have not yet received a formal taxonomic description. A phylogenetic analysis of available strains using both the nuclear 18S and plastidial 16S rRNA genes demonstrates that this group composes at least 10 different clades: A1-A7 and B1-B3. Analysis of sequences from the variable V9 region of the 18S rRNA gene collected during the Tara Oceans expedition and in the frame of the Ocean Sampling Day consortium reveal that clade VII is the dominant Chlorophyta group in oceanic waters, replacing Mamiellophyceae, which have this role in coastal waters. At some location, prasinophytes clade VII can even be the dominant photosynthetic eukaryote representing up to 80% of photosynthetic metabarcodes overall. B1 and A4 are the overall dominant clades and different clades seem to occupy distinct niches, for example, A6 is dominant in surface Mediterranean Sea waters, whereas A4 extend to high temperate latitudes. Our work demonstrates that prasinophytes clade VII constitute a highly diversified group, which is a key component of phytoplankton in open oceanic waters but has been neglected in the conceptualization of marine microbial diversity and carbon cycle.
[Mh] Termos MeSH primário: Clorófitas/genética
Eucariotos/genética
Variação Genética
Fitoplâncton/genética
[Mh] Termos MeSH secundário: Clorófitas/classificação
DNA Ribossômico/química
DNA Ribossômico/genética
Eucariotos/classificação
Eucariotos/isolamento & purificação
Mar Mediterrâneo
Oceanos e Mares
Fotossíntese
Filogenia
Fitoplâncton/classificação
Fitoplâncton/isolamento & purificação
Água do Mar
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA, Ribosomal)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:180201
[Lr] Data última revisão:
180201
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161026
[St] Status:MEDLINE
[do] DOI:10.1038/ismej.2016.120


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[PMID]:29267395
[Au] Autor:Pedrotti ML; Mousseau L; Marro S; Passafiume O; Gossaert M; Labat JP
[Ad] Endereço:Sorbonne Universités, UPMC Univ Paris 06, UMR 7093, LOV, Villefranche sur mer, France.
[Ti] Título:Variability of ultraplankton composition and distribution in an oligotrophic coastal ecosystem of the NW Mediterranean Sea derived from a two-year survey at the single cell level.
[So] Source:PLoS One;12(12):e0190121, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Ultraplankton [heterotrophic prokaryotes and ultraphytoplankton (<10 µm)] were monitored weekly over two years (2009 & 2010) in a coastal area of the NW Mediterranean Sea. Six clusters were differentiated by flow cytometry on the basis of their optical properties, two heterotrophic prokaryote (HP) subgroups labelled LNA and HNA (low and high nucleic acid content respectively), Prochlorococcus, Synechococcus, autotrophic picoeukaryotes and nanoeukaryotes. HP represented an important component of the microbial assemblage over the survey with relatively small abundance variation through seasons. The carbon biomass ratio HP/ultraphytoplankton averaged 0.45, however this ratio exceeded 1 during spring. Ultraphytoplankton biomass made about 50% of the total autotrophic carbon estimates but this contribution increased up to 97% and 67% during the 2009 and 2010 spring periods respectively. Within ultraphytoplankton, nanoeukaryote represent the most important ultraphytoplankton group in terms of autotrophic carbon biomass (up to 70%). Picoeukaryote maximum abundance occurred in winter. Synechococcus was the most abundant population (maximum 1.2 x 10 5 cells cm-3) particularly in spring where it represented up to 54% of ultraphytoplankton carbon biomass. The warmer winter-spring temperatures and the lengthening of the stratification period created a favorable situation for the earlier appearance of Synechococcus and its persistence throughout summer, paralleling Prochlorococcus development. Prochlorococcus was dominant over summer and autumn with concentrations up to 1.0 × 10 5 cells cm-3. While the abundance of Synechococcus throughout survey was of the same order as that reported in western Mediterranean Sea, Prochlorococcus was more abundant and similar to the more typical oligotrophic and warm waters. The abundance variation of the ultraplankton components through the survey was relatable to variations in the hydrological and nutrient conditions.
[Mh] Termos MeSH primário: Ecossistema
Plâncton/classificação
[Mh] Termos MeSH secundário: Biomassa
Clorofila/metabolismo
Citometria de Fluxo
Mar Mediterrâneo
Plâncton/crescimento & desenvolvimento
Plâncton/metabolismo
Análise de Célula Única
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
1406-65-1 (Chlorophyll); YF5Q9EJC8Y (chlorophyll a)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180116
[Lr] Data última revisão:
180116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171222
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190121


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[PMID]:29190825
[Au] Autor:Dzoic T; Beg Paklar G; Grbec B; Ivatek-Sahdan S; Zorica B; Segvic-Bubic T; Cikes Kec V; Lepen Pleic I; Mladineo I; Grubisic L; Verley P
[Ad] Endereço:Physical Oceanography Laboratory, Institute of Oceanography and Fisheries, Split, Croatia.
[Ti] Título:Spillover of the Atlantic bluefin tuna offspring from cages in the Adriatic Sea: A multidisciplinary approach and assessment.
[So] Source:PLoS One;12(11):e0188956, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:During routine monitoring of commercial purse seine catches in 2011, 87 fingerling specimens of scombrids were collected in the southern Adriatic Sea. Sequencing of the mitochondrial DNA control region locus inferred that specimens belonged to the Atlantic bluefin tuna, Thunnus thynnus (Linnaeus, 1758) (N = 29), bullet tuna, Auxis rochei (Risso, 1810) (N = 30) and little tunny, Euthynnus alletteratus, Rafinesque, 1810 (N = 28). According to previously published growth parameters, the age of the collected specimens was estimated at approximately 30-40 days, suggesting they might have been spawned in the Adriatic Sea, contrary to the current knowledge. A coupled modelling system with hydrodynamic (ROMS) and individual based model (IBM-Ichthyop) was set up to determine the location of the spawning event. Numerical simulations with the IBM model, both backward and forward in time, indicate commercial tuna cages in the middle Adriatic coastal area as possible spawning location. The two other non-commercial species likely opportunistically use the positive environmental (abiotic and biotic) conditions to spawn in the same area.
[Mh] Termos MeSH primário: Atum
[Mh] Termos MeSH secundário: Animais
Oceano Atlântico
Hidrodinâmica
Mar Mediterrâneo
Meteorologia
Modelos Teóricos
Reprodução
Atum/crescimento & desenvolvimento
Atum/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180101
[Lr] Data última revisão:
180101
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171201
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188956


  10 / 2744 MEDLINE  
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[PMID]:28945750
[Au] Autor:López-Pérez M; Haro-Moreno JM; Gonzalez-Serrano R; Parras-Moltó M; Rodriguez-Valera F
[Ad] Endereço:Evolutionary Genomics Group, División de Microbiología, Universidad Miguel Hernández, Campus de San Juan, San Juan de Alicante, Spain.
[Ti] Título:Genome diversity of marine phages recovered from Mediterranean metagenomes: Size matters.
[So] Source:PLoS Genet;13(9):e1007018, 2017 Sep.
[Is] ISSN:1553-7404
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Marine viruses play a critical role not only in the global geochemical cycles but also in the biology and evolution of their hosts. Despite their importance, viral diversity remains underexplored mostly due to sampling and cultivation challenges. Direct sequencing approaches such as viromics has provided new insights into the marine viral world. As a complementary approach, we analysed 24 microbial metagenomes (>0.2 µm size range) obtained from six sites in the Mediterranean Sea that vary by depth, season and filter used to retrieve the fraction. Filter-size comparison showed a significant number of viral sequences that were retained on the larger-pore filters and were different from those found in the viral fraction from the same sample, indicating that some important viral information is missing using only assembly from viromes. Besides, we were able to describe 1,323 viral genomic fragments that were more than 10Kb in length, of which 36 represented complete viral genomes including some of them retrieved from a cross-assembly from different metagenomes. Host prediction based on sequence methods revealed new phage groups belonging to marine prokaryotes like SAR11, Cyanobacteria or SAR116. We also identified the first complete virophage from deep seawater and a new endemic clade of the recently discovered Marine group II Euryarchaeota virus. Furthermore, analysis of viral distribution using metagenomes and viromes indicated that most of the new phages were found exclusively in the Mediterranean Sea and some of them, mostly the ones recovered from deep metagenomes, do not recruit in any database probably indicating higher variability and endemicity in Mediterranean bathypelagic waters. Together these data provide the first detailed picture of genomic diversity, spatial and depth variations of viral communities within the Mediterranean Sea using metagenome assembly.
[Mh] Termos MeSH primário: Organismos Aquáticos/genética
Bacteriófagos/genética
Variação Genética
Metagenoma/genética
[Mh] Termos MeSH secundário: Organismos Aquáticos/virologia
Genoma Viral
Sequenciamento de Nucleotídeos em Larga Escala
Mar Mediterrâneo
Anotação de Sequência Molecular
[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:170926
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pgen.1007018



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