Base de dados : MEDLINE
Pesquisa : B01.050.500.644.080.850.850 [Categoria DeCS]
Referências encontradas : 31 [refinar]
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  1 / 31 MEDLINE  
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[PMID]:27956259
[Au] Autor:Burzynski A; Soroka M; Mioduchowska M; Kaczmarczyk A; Sell J
[Ad] Endereço:Institute of Oceanology Polish Academy of Sciences, Sopot, Poland. Electronic address: aburzynski@iopan.gda.pl.
[Ti] Título:The complete maternal and paternal mitochondrial genomes of Unio crassus: Mitochondrial molecular clock and the overconfidence of molecular dating.
[So] Source:Mol Phylogenet Evol;107:605-608, 2017 Feb.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The availability of a rapidly growing number of complete mitochondrial genome sequences provokes high confidence dating approaches. However, even if the congruence between mitochondrial and nuclear markers is reasonable, the resulting topologies are frequently questionable. The unique opportunity to study the evolutionary history of two independent mitochondrial genomes in one phylogenetic context exists in the freshwater mussels family Unionidae. The two lineages function under doubly uniparental inheritance since well before the emergence of the family. Despite the relatively high number of available complete sequences of maternally inherited genomes, comparative analyses are limited by the small number of sequences of counterpart paternally inherited genomes. We have sequenced for the first time the representative set of five sequences (two maternal and three paternal) from the species Unio crassus. Comparative analysis of the phylogenies reconstructed using relevant mitogenomic data available in GenBank (13 species in total) reveal that single - genome inferences are congruent only if the relaxed clock is assumed.
[Mh] Termos MeSH primário: DNA Mitocondrial/genética
Genoma Mitocondrial
Mitocôndrias/genética
Unio/genética
[Mh] Termos MeSH secundário: Animais
Sequência de Bases
Feminino
Filogenia
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Mitochondrial)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170925
[Lr] Data última revisão:
170925
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161214
[St] Status:MEDLINE


  2 / 31 MEDLINE  
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[PMID]:27890716
[Au] Autor:Morthorst JE
[Ad] Endereço:Department of Biology, University of Southern Denmark, Campusvej 55, DK-5220, Odense M, Denmark. Electronic address: Jamor@biology.sdu.dk.
[Ti] Título:A field study of hemolymph yolk protein levels in a bivalve (Unio tumidus) and future considerations for bivalve yolk protein as endocrine biomarker.
[So] Source:Comp Biochem Physiol C Toxicol Pharmacol;192:16-22, 2017 Feb.
[Is] ISSN:1532-0456
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Induction of yolk protein in male fish is a recognized biomarker for estrogenic exposure because the estrogen-dependent induction mechanism is well investigated and there is a clear difference in yolk protein levels of unexposed males and females. Attempts have been made to use induction of bivalve yolk protein as biomarker for estrogenic exposure. However, several biomarker validation criteria have not yet been investigated e.g. an in-depth understanding of the induction mechanism and background variability is needed and reliable detection assays are yet to be developed. To obtain background knowledge about yolk protein levels freshwater bivalves (Unio tumidus) were collected in an uncontaminated Danish lake over the course of a year (33 collection dates). The hemolymph yolk protein concentration of 569 individuals was determined by a species specific enzyme-linked immunosorbent assay (ELISA) and male and female gonadal development cycles were established. The average yolk protein levels of males and females collected at each sampling date overlapped in some periods; the male and female range was 66,946 - 169,692 ng/mL and 88,731 - 681,667 ng/mL, respectively. Because male and female hemolymph yolk protein levels overlap, great care should be taken if yolk protein induction in bivalve hemolymph is considered as endocrine biomarker.
[Mh] Termos MeSH primário: Proteínas do Ovo/metabolismo
Disruptores Endócrinos/toxicidade
Hemolinfa/metabolismo
Unio/efeitos dos fármacos
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Biomarcadores/metabolismo
Monitoramento Ambiental/métodos
Ensaio de Imunoadsorção Enzimática
Feminino
Água Doce
Masculino
Estações do Ano
Fatores de Tempo
Unio/metabolismo
Regulação para Cima
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biomarkers); 0 (Egg Proteins); 0 (Endocrine Disruptors); 0 (Water Pollutants, Chemical)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170213
[Lr] Data última revisão:
170213
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161129
[St] Status:MEDLINE


  3 / 31 MEDLINE  
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[PMID]:26625617
[Au] Autor:Solovykh GN; Osinkina VV; Vereshchagin NN; Belomestnova VG; Vodyanitskaya OV; Kamaukhova IV
[Ti] Título:[THE CONTENT OF MERCURY IN SEDIMENTS AND THE CLAMS UNIO PICTORUM FROM THE URAL RIVER].
[So] Source:Gig Sanit;94(5):53-6, 2015 Sep-Oct.
[Is] ISSN:0016-9900
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:There was investigated the mercury total content in bottom sediments and some bodies of clams from the area of the middle reach of the Ural river near the Orenburg city. In bottom sediments there was revealed an excess of the ecological standard for mercury. There was noted the uneven distribution of toxicant in bodies of clams: the maximal contents was detected in hepatopancreas, minimal--in "foot", that apparently is determined by the unequal metabolitic activity of these tissues. The highest concentration of mercury in the tissues of clams was noted at the station "Ural river above the camp" Dubki".
[Mh] Termos MeSH primário: Monitoramento Ambiental/métodos
Sedimentos Geológicos/química
Mercúrio/análise
Rios/química
Unio/química
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Animais
Federação Russa
[Pt] Tipo de publicação:ENGLISH ABSTRACT; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); FXS1BY2PGL (Mercury)
[Em] Mês de entrada:1512
[Cu] Atualização por classe:151202
[Lr] Data última revisão:
151202
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151203
[St] Status:MEDLINE


  4 / 31 MEDLINE  
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[PMID]:26227870
[Au] Autor:Didenko T; Proudfoot A; Dutta SK; Serrano P; Wüthrich K
[Ad] Endereço:Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037 (USA) http://www.jcsg.org.
[Ti] Título:Non-Uniform Sampling and J-UNIO Automation for Efficient Protein NMR Structure Determination.
[So] Source:Chemistry;21(35):12363-9, 2015 Aug 24.
[Is] ISSN:1521-3765
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:High-resolution structure determination of small proteins in solution is one of the big assets of NMR spectroscopy in structural biology. Improvements in the efficiency of NMR structure determination by advances in NMR experiments and automation of data handling therefore attracts continued interest. Here, non-uniform sampling (NUS) of 3D heteronuclear-resolved [(1)H,(1)H]-NOESY data yielded two- to three-fold savings of instrument time for structure determinations of soluble proteins. With the 152-residue protein NP_372339.1 from Staphylococcus aureus and the 71-residue protein NP_346341.1 from Streptococcus pneumonia we show that high-quality structures can be obtained with NUS NMR data, which are equally well amenable to robust automated analysis as the corresponding uniformly sampled data.
[Mh] Termos MeSH primário: Proteínas de Bactérias/química
Ressonância Magnética Nuclear Biomolecular/métodos
Soluções/química
Staphylococcus aureus/química
[Mh] Termos MeSH secundário: Animais
Fenômenos Biológicos
Espectroscopia de Ressonância Magnética
Conformação Proteica
Unio
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Solutions)
[Em] Mês de entrada:1604
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150801
[St] Status:MEDLINE
[do] DOI:10.1002/chem.201502544


  5 / 31 MEDLINE  
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[PMID]:25781395
[Au] Autor:Falfushynska H; Gnatyshyna L; Yurchak I; Sokolova I; Stoliar O
[Ad] Endereço:Research Laboratory of Comparative Biochemistry and Molecular Biology, Ternopil National Pedagogical University, 46027, Kryvonosa Str. 2, Ternopil, Ukraine.
[Ti] Título:The effects of zinc nanooxide on cellular stress responses of the freshwater mussels Unio tumidus are modulated by elevated temperature and organic pollutants.
[So] Source:Aquat Toxicol;162:82-93, 2015 May.
[Is] ISSN:1879-1514
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Nanoparticle toxicity is a growing concern in freshwater habitats. However, understanding of the nanoparticle effects on aquatic organisms is impeded by the lack of the studies of the nanoparticles effects in the environmentally relevant context of multiple stress exposures. Zinc oxide nanoparticles (n-ZnO) are widely used metal-based nanoparticles in electronics and personal care products that accumulate in aquatic environments from multiple non-point sources. In this study, we evaluated the effects of n-ZnO in a model organism, a mussel Unio tumidus, and the potential modulation of these effects by common co-occurring environmental stressors. Male U. tumidus were exposed for 14 days to n-ZnO (3.1 µM), Zn(2+) (3.1 µM), Ca-channel blocker nifedipine (Nfd 10 µM), combinations of n-ZnO and Nfd or n-ZnO and thiocarbamate fungicide Tattoo (Ta, 91 µg L(-1)) at 18 °C, and n-ZnO at 25 °C (n-ZnO+t°). Total and metallothionein-bound Zn levels as well as levels of metallothioneins (MT), cellular stress responses and cytotoxicity biomarkers were assessed in the mussels. The key biomarkers that showed differential responses to different single and combined stressors in this study were activities of caspase-3 and lysosomal cathepsin D, as well as protein carbonyl content. At 18 °C, exposures to n-ZnO, organic pollutants and their combinations led to a prominent up-regulation of MT levels (by ∼30%) and oxidative stress response including up-regulation of superoxide dismutase activity, an increase in oxyradical production, and a 2-3-fold decrease in the levels of protein carbonyls in all exposures except nZnO+Ta. Expos ure to n-ZnO in the absence of other stressors also led to a strong (∼7-fold) elevation of cathepsin D activity. Cellular responses to Zn(2+) and n-ZnO were different indicating that n-ZnO was not due exclusively to Zn release. Ca-channel blocker Nfd affected intracellular Zn distribution (reflected in the prominent elevation of Zn-MT levels) and caused reductive stress indicated by elevated levels of reduced glutathione levels and an increase in lactate/pyruvate ratio (reflecting higher NADH/NAD ratio). Elevated temperature (25 °C) abolished most of the typical responses to n-ZnO and induced oxidative injury, DNA fragmentation and caspase-3 mediated apoptosis in n-ZnO-exposed mussels. DNA fragmentation was also induced by exposure to organic toxins (alone and in combination with n-ZnO) but not by n-ZnO alone. These data indicate that n-ZnO toxicity to freshwater organisms is modulated by organic pollutants and enhanced by elevated temperatures.
[Mh] Termos MeSH primário: Bloqueadores dos Canais de Cálcio/toxicidade
Temperatura Alta/efeitos adversos
Nanopartículas/toxicidade
Nifedipino/toxicidade
Unio/efeitos dos fármacos
Poluentes Químicos da Água/toxicidade
Óxido de Zinco/toxicidade
[Mh] Termos MeSH secundário: Animais
Apoptose/efeitos dos fármacos
Biomarcadores/metabolismo
Água Doce
Masculino
Metalotioneína/metabolismo
Estresse Oxidativo/efeitos dos fármacos
Estresse Oxidativo/fisiologia
Unio/metabolismo
Regulação para Cima
[Pt] Tipo de publicação:EVALUATION STUDIES; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Biomarkers); 0 (Calcium Channel Blockers); 0 (Water Pollutants, Chemical); 0 (zinc thionein); 9038-94-2 (Metallothionein); I9ZF7L6G2L (Nifedipine); SOI2LOH54Z (Zinc Oxide)
[Em] Mês de entrada:1512
[Cu] Atualização por classe:150414
[Lr] Data última revisão:
150414
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150318
[St] Status:MEDLINE


  6 / 31 MEDLINE  
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[PMID]:25681606
[Au] Autor:Khazri A; Sellami B; Dellali M; Corcellas C; Eljarrat E; Barceló D; Mahmoudi E
[Ad] Endereço:Laboratoire de Biosurveillance de l'Environnement (LBE), Unité d'Ecotoxicologie et d'Ecologie Côtière (GREEC), Faculté des Sciences de Bizerte, 7021 Zarzouna, Bizerte, Tunisia.
[Ti] Título:Acute toxicity of cypermethrin on the freshwater mussel Unio gibbus.
[So] Source:Ecotoxicol Environ Saf;115:62-6, 2015 May.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Cypermethrin is a synthetic pyrethroid insecticide used worldwide in agriculture, home pest control, food stuff protection and disease vector control. We investigate the potential of cypermethrin to induce oxidative stress and enzyme activities within the gills of freshwater mussel Unio gibbus. This study was carried out under laboratory conditions using two nominal cypermethrin concentrations C1 (100µg/L) and C2 (150µg/L) during 96h. The measured concentrations of cypermethrin using GC-MS-MS in the treatment aquariums were respectively 59.7 µg/L and 97.5µg/L. Antioxidant enzyme activities (superoxide dismutase (SOD) and catalase (CAT)) as well as H2O2, malondialdehyde (MDA) and protein carbonyl (PCO) levels were assessed. An exposure during 96h induced the SOD activity at the highest concentration. The CAT activity and H2O2 level were increased significantly (P<0.05) in gills following a dose-dependent profile. Cypermethrin also generated an increase in malondialdehyde (MDA) levels reaching the highest value at the high concentration. The considered parameters can be used as biomarkers of exposure to cypermethrin. Freshwater mussel U. gibbus can be potentially employed in biomonitoring surveys of such threatened ecosystems.
[Mh] Termos MeSH primário: Inseticidas/toxicidade
Piretrinas/toxicidade
Unio/efeitos dos fármacos
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Antioxidantes/metabolismo
Biomarcadores/metabolismo
Catalase/metabolismo
Monitoramento Ambiental
Brânquias/efeitos dos fármacos
Brânquias/enzimologia
Peróxido de Hidrogênio/metabolismo
Inseticidas/análise
Malondialdeído/metabolismo
Estresse Oxidativo/efeitos dos fármacos
Piretrinas/análise
Superóxido Dismutase/metabolismo
Unio/enzimologia
Unio/metabolismo
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antioxidants); 0 (Biomarkers); 0 (Insecticides); 0 (Pyrethrins); 0 (Water Pollutants, Chemical); 1TR49121NP (cypermethrin); 4Y8F71G49Q (Malondialdehyde); BBX060AN9V (Hydrogen Peroxide); EC 1.11.1.6 (Catalase); EC 1.15.1.1 (Superoxide Dismutase)
[Em] Mês de entrada:1511
[Cu] Atualização por classe:151119
[Lr] Data última revisão:
151119
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150215
[St] Status:MEDLINE


  7 / 31 MEDLINE  
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[PMID]:25335578
[Au] Autor:Sabbioni E; Polettini AE; Fortaner S; Farina M; Groppi F; Manenti S; Libralato G
[Ad] Endereço:CeSI, Aging Research Center, "G. d'Annunzio" University Foundation, Via Colle dell'Ara, 66100, Chieti, Italy.
[Ti] Título:Uptake from water, internal distribution and bioaccumulation of selenium in Scenedesmus obliquus, Unio mancus and Rattus norvegicus: part B.
[So] Source:Bull Environ Contam Toxicol;94(1):90-5, 2015 Jan.
[Is] ISSN:1432-0800
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:(75)Se-selenite transfer was investigated in a phytoplankton-mussel-rat food chain model consisting of Scenedesmus obliquus (Turpin) Kützing, Unio mancus Lamark and Rattus norvegicus Berkenhout. (75)Se-metabolized forms were investigated in order to identify potential critical steps in the food chain, as well as its relative bioavailability looking also at intracellular, cellular and organ partitioning. Tissue and intracellular distribution of (75)Se in mussels fed with (75)Se-S. obliquus was different compared to those exposed only to inorganic (75)Se-selenite. The intracellular distribution of (75)Se in the hepatopancreas and mantle of mussels fed (75)Se-microalgae was similar to hepatic and renal distributions in rats, suggesting that their stomach dissociated larger (75)Se-containing molecules. The (75)Se partitioned from water (culture medium) to microalgae showing a bioconcentration factor of 435. The bottleneck in the trophic transfer of (75)Se occurred between S. obliquus-U. mancus. From microalgae to mussels and subsequently to rats no bioaccumulation was verified.
[Mh] Termos MeSH primário: Scenedesmus/metabolismo
Selênio/análise
Selênio/farmacocinética
Unio/metabolismo
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Animais
Disponibilidade Biológica
Meios de Cultura
Cadeia Alimentar
Água Doce/química
Rim/metabolismo
Fígado/metabolismo
Masculino
Microalgas/metabolismo
Ratos
Ratos Sprague-Dawley
Compostos de Selênio/metabolismo
Frações Subcelulares
Distribuição Tecidual
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Culture Media); 0 (Selenium Compounds); 0 (Water Pollutants, Chemical); H6241UJ22B (Selenium)
[Em] Mês de entrada:1507
[Cu] Atualização por classe:150105
[Lr] Data última revisão:
150105
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141023
[St] Status:MEDLINE
[do] DOI:10.1007/s00128-014-1406-3


  8 / 31 MEDLINE  
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[PMID]:25327388
[Au] Autor:Polettini AE; Fortaner S; Farina M; Groppi F; Manenti S; Libralato G; Sabbioni E
[Ad] Endereço:Medicine and Public Health, University of Verona, P.le L.A. Scuro 10, Policlinico Borgoroma Verona, 37134, Verona, Italy.
[Ti] Título:Uptake from water, internal distribution and bioaccumulation of selenium in Scenedesmus obliquus, Unio mancus and Rattus norvegicus: part A.
[So] Source:Bull Environ Contam Toxicol;94(1):84-9, 2015 Jan.
[Is] ISSN:1432-0800
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The (75)Se internal bioavailability was investigated in microalgae, mussels and rats as biological experimental models. The (75)Se accumulation from freshwater to microalgae [Scenedesmus obliquus (Turpin) Kützing], from freshwater to mussels (Unio mancus Lamark) and, finally, per os to rats (Rattus norvegicus Berkenhout) was followed using (75)Se-labelled selenite looking at (75)Se uptake, retention, intracellular distribution and binding with cellular biocomplexes. After exposure to 10, 50 and 500 µg Se L(-1), the microalgae showed an inhibitory effect on population growth only at the highest concentration. Mussels exposed to 105 µg Se L(-1) showed an accumulation of the element with time in all tissues. Intracellularly, Se was present in all subcellular fractions, especially in the cytosol. Rats were treated via oral administration with 5 µg Se rat(-1). After 24 h, liver and kidney showed the highest Se concentration.
[Mh] Termos MeSH primário: Scenedesmus/metabolismo
Selênio/análise
Selênio/farmacocinética
Unio/metabolismo
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Animais
Água Doce/química
Rim/metabolismo
Fígado/metabolismo
Masculino
Microalgas/metabolismo
Ratos
Ratos Sprague-Dawley
Compostos de Selênio/metabolismo
Frações Subcelulares
Distribuição Tecidual
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Selenium Compounds); 0 (Water Pollutants, Chemical); H6241UJ22B (Selenium)
[Em] Mês de entrada:1507
[Cu] Atualização por classe:150105
[Lr] Data última revisão:
150105
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141021
[St] Status:MEDLINE
[do] DOI:10.1007/s00128-014-1407-2


  9 / 31 MEDLINE  
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[PMID]:25066673
[Au] Autor:Morthorst JE; Holbech H; Jeppesen M; Kinnberg KL; Pedersen KL; Bjerregaard P
[Ad] Endereço:Department of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark. Electronic address: Jamor@biology.sdu.dk.
[Ti] Título:Evaluation of yolk protein levels as estrogenic biomarker in bivalves; comparison of the alkali-labile phosphate method (ALP) and a species-specific immunoassay (ELISA).
[So] Source:Comp Biochem Physiol C Toxicol Pharmacol;166:88-95, 2014 Nov.
[Is] ISSN:1532-0456
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Altered concentration of the vertebrate yolk protein precursor vitellogenin is a recognized biomarker for endocrine disruption in fish, and within recent years yolk protein alteration has also been associated with endocrine disruption in bivalves. Species-specific, direct and sensitive methods for quantification of vitellogenin in fish have been available for years whereas bivalve yolk protein levels have been estimated indirectly by alkali-labile phosphate (ALP) liberated from high molecular weight proteins because the sequence and biochemical structure of most bivalve yolk proteins are unknown. By applying a species-specific enzyme-linked immunosorbent assay (ELISA) for accurate determination of yolk protein level the impact of 17ß-estradiol (57, 164 and 512 ng/L) on the freshwater bivalve Unio tumidus was investigated and compared with ALP estimations. Seven weeks of exposure during the pre-spawning and spawning period had no consistent effect on yolk protein concentration in hemolymph, and ALP levels in hemolymph also remained unchanged in both males and females. Further, basal male and female ALP levels were indistinguishable whereas the ELISA demonstrated that yolk protein levels of females exceeded male levels at the time of sampling, although male basal levels were high compared to fish. Altogether it is shown that individual ALP levels do not reflect yolk protein levels and hence hemolymph ALP levels cannot serve as biomarker for estrogenic exposure during the pre-spawning and spawning period in U. tumidus. The necessity of sensitive and validated biomarkers for reliable interpretation of data and the utility of ALP and yolk protein levels as biomarkers in bivalves are discussed.
[Mh] Termos MeSH primário: Proteínas na Dieta/análise
Proteínas do Ovo/análise
Disruptores Endócrinos/toxicidade
Inspeção de Alimentos/métodos
Frutos do Mar/análise
Unio/efeitos dos fármacos
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Especificidade de Anticorpos
Biomarcadores/análise
Biomarcadores/metabolismo
Dinamarca
Proteínas na Dieta/metabolismo
Relação Dose-Resposta a Droga
Proteínas do Ovo/metabolismo
Disruptores Endócrinos/administração & dosagem
Ensaio de Imunoadsorção Enzimática
Estradiol/administração & dosagem
Estradiol/toxicidade
Estrogênios/administração & dosagem
Estrogênios/toxicidade
Feminino
Hemolinfa/química
Hemolinfa/efeitos dos fármacos
Hemolinfa/metabolismo
Lagos
Limite de Detecção
Masculino
Reprodução/efeitos dos fármacos
Caracteres Sexuais
Unio/crescimento & desenvolvimento
Unio/metabolismo
Poluentes Químicos da Água/administração & dosagem
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; VALIDATION STUDIES
[Nm] Nome de substância:
0 (Biomarkers); 0 (Dietary Proteins); 0 (Egg Proteins); 0 (Endocrine Disruptors); 0 (Estrogens); 0 (Water Pollutants, Chemical); 4TI98Z838E (Estradiol)
[Em] Mês de entrada:1505
[Cu] Atualização por classe:151119
[Lr] Data última revisão:
151119
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140729
[St] Status:MEDLINE


  10 / 31 MEDLINE  
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[PMID]:24956953
[Au] Autor:Lurman GJ; Walter J; Hoppeler HH
[Ad] Endereço:Institute of Anatomy, University of Bern, Baltzerstr. 2, 3012 Bern, Switzerland. Electronic address: glenn.lurman@ana.unibe.ch.
[Ti] Título:The effect of seasonal temperature variation on behaviour and metabolism in the freshwater mussel (Unio tumidus).
[So] Source:J Therm Biol;43:13-23, 2014 Jul.
[Is] ISSN:0306-4565
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Temperature plays a critical role in determining the biology of ectotherms. Many animals have evolved mechanisms that allow them to compensate biological rates, i.e. adjust biological rates to overcome thermodynamic effects. For low energy-organisms, such as bivalves, the costs of thermal compensation may be greater than the benefits, and thus prohibitive. To examine this, two experiments were designed to explore thermal compensation in Unio tumidus. Experiment 1 examined seasonal changes in behaviour in U. tumidus throughout a year. Temperature had a clear effect on burrowing rate with no evidence of compensation. Valve closure duration and frequency were also strongly affected by seasonal temperature change, but there was slight evidence of partial compensation. Experiment 2 examined oxygen consumption during burrowing, immediately following valve opening and at rest in summer (24 °C), autumn (14 °C), winter (4 °C), and spring (14 °C) acclimatized U. tumidus. Again, there was little evidence of burrowing rate compensation, but some evidence of partial compensation of valve closure duration and frequency. None of the oxygen compensation rates showed any evidence of thermal compensation. Thus, in general, there was only very limited evidence of thermal compensation of behaviour and no evidence of thermal compensation of oxygen compensation rates. Based upon this evidence, we argue that there is no evolutionary pressure for these bivalves to compensate these biological rates. Any pressure may be to maintain or even lower oxygen consumption as their only defence against predation is to close their valves and wait. An increase in oxygen consumption will be detrimental in this regard so the cost of thermal compensation may outweigh the benefits.
[Mh] Termos MeSH primário: Comportamento Animal/fisiologia
Unio/fisiologia
[Mh] Termos MeSH secundário: Aclimatação
Animais
Água Doce
Consumo de Oxigênio
Estações do Ano
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1502
[Cu] Atualização por classe:140624
[Lr] Data última revisão:
140624
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140625
[St] Status:MEDLINE



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