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https://www.readbyqxmd.com/read/28431764/seasonal-monitoring-of-blue-mussel-mytilus-spp-populations-in-a-harbor-area-a-focus-on-responses-to-environmental-factors-and-chronic-contamination
#1
C Lacroix, E Duvieilbourg, N Guillou, J Guyomarch, C Bassoulet, D Moraga, G Chapalain, M Auffret
Coastal waters corresponding to macrotidal systems are among the most variable marine biotopes. Sessile animals as bivalve mollusks may however be found forming intertidal beds at high densities, as allowed by full adaptation to local conditions. A better knowledge of adaptive responses to environmental factors is required to foresee possible adverse effects of global change. At the sub-cellular level, transcriptional responses are among the earliest signals of environmental disturbances and they can reveal subtle and meaningful changes in organism exposed to stress...
April 12, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28413723/physiological-effects-of-five-different-marine-natural-organic-matters-noms-and-three-different-metals-cu-pb-zn-on-early-life-stages-of-the-blue-mussel-mytilus-galloprovincialis
#2
Lygia Sega Nogueira, Adalto Bianchini, Scott Smith, Marianna Basso Jorge, Rachael L Diamond, Chris M Wood
Metals are present in aquatic environments as a result of natural and anthropogenic inputs, and may induce toxicity to organisms. One of the main factors that influence this toxicity in fresh water is natural organic matter (NOM) but all NOMs are not the same in this regard. In sea water, possible protection by marine NOMs is not well understood. Thus, our study isolated marine NOMs by solid-phase extraction from five different sites and characterized them by excitation-emission fluorescence analysis-one inshore (terrigenous origin), two offshore (autochthonous origin), and two intermediate in composition (indicative of a mixed origin)...
2017: PeerJ
https://www.readbyqxmd.com/read/28391487/ecotoxicological-evaluation-of-the-uv-filters-ethylhexyl-dimethyl-p-aminobenzoic-acid-and-octocrylene-using-marine-organisms-isochrysis-galbana-mytilus-galloprovincialis-and-paracentrotus-lividus
#3
A Giraldo, R Montes, R Rodil, J B Quintana, L Vidal-Liñán, R Beiras
The growing concern regarding the negative effects of solar radiation on the skin has led to a drastic increase in the use of sunscreens containing in its composition up to 10% of aromatic chemicals, such as ethylhexyl dimethyl p-aminobenzoic acid (OD-PABA) and octocrylene (OC). The objective of this study was to evaluate the toxicity and to assess the environmental risk posed by these two ultraviolet filters, widely used in cosmetics and as plastic additives, in the marine environment. Several ecotoxicological bioassays were performed with three model organisms belonging to different trophic levels: the microalgae Isochrysis galbana, the mussel Mytilus galloprovincialis, and the sea urchin Paracentrotus lividus...
April 8, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28390964/responses-of-mytilus-galloprovincialis-hemocytes-to-environmental-strains-of-vibrio-parahaemolyticus-vibrio-alginolyticus-vibrio-vulnificus
#4
C Ciacci, A Manti, B Canonico, R Campana, G Camisassi, W Baffone, L Canesi
Marine bivalves are exposed to different types of bacteria in the surrounding waters, in particular of the Vibrio genus. In the hemocytes of the mussel Mytilus spp. immune responses to different vibrios have been largely characterized. However, little information is available on the hemocyte responses to human pathogenic vibrios commonly detected in coastal waters and bivalve tissues that are involved in seafood-borne diseases. In this work, functional parameters of the hemocytes from the Mediterranean mussel M...
April 5, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28390233/physiological-and-biochemical-alterations-induced-in-the-mussel-mytilus-galloprovincialis-after-short-and-long-term-exposure-to-carbamazepine
#5
Patrícia Oliveira, Ângela Almeida, Vânia Calisto, Valdemar I Esteves, Rudolf J Schneider, Frederick J Wrona, Amadeu M V M Soares, Etelvina Figueira, Rosa Freitas
The bivalve Mytilus galloprovincialis collected in the Ria de Aveiro, was selected to evaluate the acute and chronic effects of carbamazepine (CBZ) at environmentally relevant concentrations. CBZ is an antiepileptic drug widely found in the aquatic environment with toxic effects to inhabiting organisms. However, few studies evaluated the acute and chronic toxicity of this drug. The experiment was performed by exposing mussels to 0.0, 0.3, 3.0, 6.0 and 9.0 CBZ μg/L, for 96 h and 28 days. To assess the toxicity of the drug, a battery of biomarkers related to mussels general physiological health status and oxidative stress was applied...
March 27, 2017: Water Research
https://www.readbyqxmd.com/read/28389696/temperature-increases-hypoxia-and-changes-in-food-availability-affect-immunological-biomarkers-in-the-marine-mussel-mytilus-galloprovincialis
#6
M G Parisi, M Mauro, G Sarà, M Cammarata
Temperature increases, hypoxia, and changes in food availability are predicted to occur in the future. There is growing concern for the health status of wild and farmed organisms, since environmental stressors alter organism functions, and elicit coordinated physiological responses for homeostasis. Mussels are good bioindicators of environmental conditions. Their ability to maintain unaltered immunosurveillance under adverse environmental conditions may enhance their survival capability. Few studies are currently concerned with the relationships and feedback among multiple stressors...
April 7, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28382446/quantification-and-characterization-of-microplastics-in-blue-mussels-mytilus-edulis-protocol-setup-and-preliminary-data-on-the-contamination-of-the-french-atlantic-coast
#7
Nam Ngoc Phuong, Aurore Zalouk-Vergnoux, Abderrahmane Kamari, Catherine Mouneyrac, Frederic Amiard, Laurence Poirier, Fabienne Lagarde
Microplastics (MPs) constitute a main environmental issue due to their threat to marine organisms and so far to humans. The lack of a fast standard protocol in MP isolation and identification from living organisms bring to challenge for the science. In this paper, an optimized protocol using potassium hydroxide 10% (KOH 10%; m/v) for digestion of mussel soft tissues (Mytilus edulis) and multi-steps of sedimentation has been developed. Efficiency higher than 99.9% of organic and mineral matter elimination was shown by application on mussels sampled on the French Atlantic coast...
April 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28380406/the-role-of-acetone-in-the-omim-bf4-mediated-adverse-effects-on-tissues-of-mussels-human-lymphocytes-and-the-fruit-fly-drosophila-melanogaster
#8
Vasiliki Tsarpali, Andreas Goutas, Anna Karyda, Ioanna Efthimiou, Maria Antonopoulou, Elena Drosopoulou, Dimitrios Vlastos, Ioannis Konstantinou, Penelope Mavragani-Tsipidou, Stefanos Dailianis
The present study investigated [omim][BF4]-mediated adverse effects on biological models widely used in toxicological studies. Specifically, mussels of the genus Mytilus, human lymphocytes and fruit flies of the species Drosophila melanogaster, were exposed to [omim][BF4] at concentrations ranging from micro- to milligrams per liter, with or without the presence of acetone as a carrier solvent and thereafter [omim][BF4]-mediated adverse effects were analyzed appropriately (stress indices, such as lipid peroxidation byproducts, acetylcholinesterase/AChE activity and micronucleus/MN formation frequency, in mussel gills, Cytokinesis Block Micronucleus/CBMN assay and SMART test in human lymphocytes and fruit flies respectively)...
March 24, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28376248/keystone-predation-and-molecules-of-keystone-significance
#9
Richard K Zimmer, Graham A Ferrier, Steven J Kim, Rachel R Ogorzalek Loo, Cheryl Ann Zimmer, Joseph A Loo
Keystone species structure ecological communities and are major determinants of biodiversity. A synthesis of research on keystone species is nonetheless missing a critical component -NDASH- the sensory mechanisms for behavioral interactions that determine population- and community-wide attributes. Here, we establish the chemosensory basis for keystone predation by sea stars (Pisaster ochraceus) on mussels. This consumer-resource interaction is prototypic of top-down driven trophic cascades. Each mussel species (Mytilus californianus and M...
April 4, 2017: Ecology
https://www.readbyqxmd.com/read/28372235/high-resolution-melting-analysis-for-identification-of-commercially-important-mytilus-species
#10
Felipe Jilberto, Cristián Araneda, María Angélica Larraín
Mytilus are edible mussels, including commercially-significant species such as M. chilensis, M. galloprovincialis and M. edulis. The scientific name of the species must be indicated on commercial products to satisfy labelling and traceability requirements. Species identification using morphological criteria is difficult due the plasticity of these characteristics and the absence of shells in processed products, and conventional PCR-based methods are laborious and time-intensive. As alternative, we propose high resolution melting (HRM) analysis as a simple tool to detect and identify SNP (single nucleotide polymorphisms) and length polymorphisms in Mytilus spp...
August 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28371659/the-ros-mediated-pathway-coupled-with-the-mapk-p38-signalling-pathway-and-antioxidant-system-plays-roles-in-the-responses-of-mytilus-edulis-haemocytes-induced-by-bde-47
#11
Yongshun Jiang, Xuexi Tang, Bin Zhou, Tianli Sun, Hongmei Chen, Xinyu Zhao, You Wang
Our previous study found that BDE-47 could change the immune function of haemocytes in Mytilus edulis, and reactive oxygen species (ROS) might be involved in the process of physiological alteration. Here, we aimed to better understand this relationship. To accomplish this, we analysed changes in different ROS as well as various antioxidant system components. Additionally, the expression of MAPK-p38, a signalling protein regulated by ROS that helps to regulate numerous cellular processes, was also analysed. BDE-47 was given at low, medium, and high amounts...
March 18, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28368680/transcriptional-variations-in-biomarkers-of-mytilus-galloprovincialis-sampled-from-central-adriatic-coastal-waters-marche-region-italy
#12
Paolo Cocci, Martina Capriotti, Gilberto Mosconi, Francesco Alessandro Palermo
OBJECTIVE: this work evaluates the expression of several biomarker genes (i.e. CAT, HSPs, MT10, p53, GSTpi, ER1/2) in Mytilus galloprovincialis native specimens to identify pollution related transcriptional changes. METHODS: gene expression levels were analyzed in the gills of mussels from 5 sites along a coastal area of the central Adriatic sea, using qPCR. RESULTS: we observed higher expression levels of biomarker genes in mussels from the local harbour or river mouths than in mussels from the reference site and offshore platform...
April 3, 2017: Biomarkers: Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
https://www.readbyqxmd.com/read/28366394/the-relationship-between-pseudo-nitzschia-peragallo-and-domoic-acid-in-scottish-shellfish
#13
E Bresnan, R J Fryer, S Fraser, N Smith, L Stobo, N Brown, E Turrell
The diatom genus Pseudo-nitzschia (Peragallo) associated with the production of domoic acid (DA), the toxin reposnsible for amnesic shellfish poisoning, is abundant in Scottish waters. A two year study examined the relationship between Pseudo-nitzschia cells in the water column and DA concentration in blue mussels (Mytilus edulis) at two sites, and king scallops (Pecten maximus) at one site. The rate of DA uptake and depuration differed greatly between the two species with M. edulis whole tissue accumulating and depurating 7μgg(-1) (now expressed as mgkg(-1)) per week...
March 2017: Harmful Algae
https://www.readbyqxmd.com/read/28361486/size-effect-on-the-mineralogy-and-chemistry-of-mytilus-trossulus-shells-from-the-southern-baltic-sea-implications-for-environmental-monitoring
#14
Anna Piwoni-Piórewicz, Piotr Kukliński, Stanislav Strekopytov, Emma Humphreys-Williams, Jens Najorka, Anna Iglikowska
Mussels have the ability to control biomineral production and chemical composition, producing shells with a range of functions. In addition to biological control, the environment also seems to influence the process of biomineralization; thus, shells can be used as archives of ambient water parameters during the calcium carbonate deposition. Past and present environmental conditions are recorded in the shells in the form of various proxies including Mg/Ca or Sr/Ca ratios. For such proxies to be accurate and robust, the influence of biological effects including the size of studied organism must be examined and eliminated or minimized, so that the environmental signal can be efficiently extracted...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28337153/defense-responses-to-short-term-hypoxia-and-seawater-acidification-in-the-thick-shell-mussel-mytilus-coruscus
#15
Yanming Sui, Yimeng Liu, Xin Zhao, Sam Dupont, Menghong Hu, Fangli Wu, Xizhi Huang, Jiale Li, Weiqun Lu, Youji Wang
The rising anthropogenic atmospheric CO2 results in the reduction of seawater pH, namely ocean acidification (OA). In East China Sea, the largest coastal hypoxic zone was observed in the world. This region is also strongly impacted by ocean acidification as receiving much nutrient from Changjiang and Qiantangjiang, and organisms can experience great short-term natural variability of DO and pH in this area. In order to evaluate the defense responses of marine mussels under this scenario, the thick shell mussel Mytilus coruscus were exposed to three pH/pCO2 levels (7...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28334251/isolation-of-vibrionaceae-from-wild-blue-mussel-mytilus-edulis-adults-and-their-impact-on-blue-mussel-larviculture
#16
Mieke Eggermont, Peter Bossier, Gde Sasmita Julyantoro Pande, Vyshal Delahaut, Ali Md Rayhan, Nipa Gupta, Shikder Saiful Islam, Elsie Yumo, Nancy Nevejan, Patrick Sorgeloos, Bruno Gomez-Gil, Tom Defoirdt
The blue mussel (Mytilus edulis) is known as a robust bivalve species, although its larviculture appears to be highly susceptible to diseases. In this study, we isolated 17 strains from induced mortality events in healthy wild-caught blue mussel adults and demonstrated that they caused between 17% and 98% mortality in blue mussel larvae in a newly developed, highly controlled immersion challenge test model. Eight of the isolates belong to the Splendidus clade of vibrios, while the other isolates belong to the genus Photobacterium...
April 1, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28316346/invasion-trajectory-of-pacific-oysters-in-the-northern-wadden-sea
#17
Karsten Reise, Christian Buschbaum, Heike Büttger, Johannes Rick, K Mathias Wegner
Invasion trajectories of introduced alien species usually begin with a long establishment phase of low abundance, often followed by exponential expansion and subsequent adjustment phases. We review the first 26 years of feral Pacific oysters Crassostrea gigas around the island of Sylt in the Wadden Sea (North Sea, NE Atlantic), and reveal causal conditions for the invasion phases. Sea-based oyster farming with repeated introductions made establishment of feral oysters almost inevitable. Beds of mussels Mytilus edulis on mud flats offered firm substrate for attachment and ideal growth conditions around low tide level...
2017: Marine Biology
https://www.readbyqxmd.com/read/28284552/mussels-as-bioindicators-of-diclofenac-contamination-in-coastal-environments
#18
S C Cunha, A Pena, J O Fernandes
Diclofenac a nonsteroidal anti-inflammatory drug (NSAID) has been confirmed as an emerging contaminant in the aquatic environment. Toxicology studies have revealed that harmful effects may emerge from diclofenac presence not only for human health, but also for marine organisms, which implies its monitoring. To overcome the demanding challenges of diclofenac quantification in biotic aquatic species, a novel method for the determination of diclofenac in mussels (Mytilus galloprovincialis and Mytilus edulis) and macroalgae (Laminaria digitata) using high performance liquid chromatography coupled to tandem mass spectrometry was developed and validated according to the EC Decision 2002/657/EC...
March 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28282459/nuclear-morphometry-and-ploidy-of-normal-and-neoplastic-haemocytes-in-mussels
#19
Francesca Carella, Gionata De Vico, Gabriel Landini
Haemic neoplasia (HN) in bivalves has been reported in association with mass mortality events in various species of molluscs. The aim of this work was to quantify the nuclear morphometry and DNA content of neoplastic cells of mussels Mytilus galloprovincialis affected by HN using nuclear densitometry in Feulgen-stained preparations. The results were also compared with a population of normal mussel haemocytes. We captured 256 images of 3 different neoplasia stages and 120 images of normal haemocytes; thus, a total of 120,166 nuclei were analysed...
2017: PloS One
https://www.readbyqxmd.com/read/28280946/efficacy-and-ecotoxicity-of-novel-anti-fouling-nanomaterials-in-target-and-non-target-marine-species
#20
Francisco Avelelas, Roberto Martins, Tânia Oliveira, Frederico Maia, Eliana Malheiro, Amadeu M V M Soares, Susana Loureiro, João Tedim
Biofouling is a global problem that affects virtually all the immersed structures. Currently, several novel environmentally friendly approaches are being tested worldwide to decrease the toxicity of biocides in non-fouling species, such as the encapsulation/immobilization of commercially available biocides, in order to achieve control over the leaching rate. The present study addresses the toxicity of two widely used booster biocides, zinc pyrithione (ZnPT) and copper pyrithione (CuPT), in its free and incorporated forms in order to assess their toxicity and anti-fouling efficacy in target and non-target species...
March 9, 2017: Marine Biotechnology
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