| the structure of dreissena polymorpha populations from basins adjacent to the chernobyl atomic power station. | the genetic and morphological differences among seven dreissena polymorpha populations exposed to various environmental factors in the water basins adjacent to the chernobyl atomic power station were examined. all of the populations showed differences in gene frequencies at four polymorphic loci. the populations could be divided into two groups according to temperature regime at the breeding site. differences in dreissena polymorpha populations were observed largely for those loci that showed si ... | 1992 | 1574699 |
| [characterization of the cercaria of bucephalus polymorphus baer, 1827 (trematoda, bucephalidae): chetotaxy and excretory system]. | we describe the excretory system and the chetotaxy of the cercaria of bucephalus polymorphus baer, 1827 which develops in dreissena polymorpha (lamellibranch, dreissenidae) in south-east of france. we compare our observations with those realised in poland and we discuss about the differences observed. | 1984 | 6524822 |
| intestinal fish parasites as heavy metal bioindicators: a comparison between acanthocephalus lucii (palaeacanthocephala) and the zebra mussel, dreissena polymorpha. | | 1997 | 9184035 |
| experimental pathogenicity of aeromonas spp. for the zebra mussel, dreissena polymorpha | experiments were conducted to determine whether species of aeromonas were pathogenic to the zebra mussel dreissena polymorpha. a. jandaei, a. veronii, and a. media, identified with biolog, were originally isolated from dead zebra mussels. when inoculated into living mussels, these bacteria resulted in the mortality of the bivalves. two additional species, a. salmonicida salmonicida (atcc 33678) and a. hydrophila (atcc 7966), were also demonstrated to be pathogenic to the mussels. in addition to ... | 1998 | 9405741 |
| field and laboratory studies of zebra mussel (dreissena polymorpha) infection by the ciliate conchophthirus acuminatus in the republic of belarus. | this study quantifies the infection prevalence and intensity of the european, commensal, host-specific ciliate conchophthirus acuminatus (scuticociliatida: conchophthiridae) in five zebra mussel populations within the republic of belarus. laboratory and field experiments were also conducted to assess variables affecting infection. c. acuminatus was found in zebra mussels in all five waterbodies sampled: naroch, myastro, and lukomskoe lakes, skema stream, and in the svisloch river. prevalence was ... | 1998 | 9538030 |
| bioassays using the midge chironomus riparius and the zebra mussel dreissena polymorpha for evaluation of river water quality. | to evaluate if the water quality of the river meuse affects macrofauna species, the impact of water from this river on two representative species was tested under controlled conditions. short-term bioassays with reference populations of the midge chironomus riparius and the zebra mussel dreissena polymorpha were performed simultaneously, using growth and filtration rate as sublethal parameters, respectively. filtration rates of mussels seemed to be slightly inhibited by meuse water in 1994 and 1 ... | 1998 | 9543505 |
| body cooling and its energetic implications for feeding and diving of tufted ducks. | wintering in a temperate climate with low water temperatures is energetically expensive for diving ducks. the energy costs associated with body cooling due to diving and ingesting large amounts of cold food were measured in tufted ducks (aythya fuligula) feeding on zebra mussels (dreissena polymorpha), using implanted heart rate and body temperature transmitters. the effects of diving depth and food ingestion were measured in two sets of experiments: we measured body cooling and energy costs of ... | 1998 | 9798260 |
| heavy metal concentrations in adult acanthocephalans and cestodes compared to their fish hosts and to established free-living bioindicators. | intestinal helminths of fish caught from freshwater and brackish water biotopes throughout europe were analysed by electrothermal atomic absorption spectrometry for their heavy metal (pb and cd) levels. the metal concentrations of the parasites were compared to those of different organs (muscle, liver, intestine) of the fish hosts and to those detected in the whole bodies of the respective intermediate hosts. the three acanthocephalan species analysed contained very high amounts of pb and cd. th ... | 1997 | 9802069 |
| identification of an enzymatically formed glutathione conjugate of the cyanobacterial hepatotoxin microcystin-lr: the first step of detoxication. | cyanobacterial toxins have adverse effects on mammals, birds and fish and are being increasingly recognised as a potent stress factor and health hazard factor in aquatic ecosystems. microcystins, cyclic heptapeptides and a main group of the cyanotoxins are mainly retained within the producer cells during cyanobacterial bloom development. however, these toxins are released into the surrounding medium by senescence and lysis of the blooms. any toxin present could then come into contact with a wide ... | 1998 | 9838216 |
| formation and identification of azaarene transformation products from aquatic invertebrate and algal metabolism. | the metabolism of two azaarenes, viz. acridine and phenanthridine, by aquatic organisms was studied in short-term and chronic laboratory tests. the identity of metabolites observed in the test waters was investigated with different analytical methods, including hplc, gc and hyphenated lc- or gc-ms. the zebra mussel (dreissena polymorpha), one green alga species (selenastrum capricornutum) and periphyton or bacteria transformed acridine into 9[10h]-acridinone. phenanthridine was transformed into ... | 1999 | 10219667 |
| immunolocalization of dpfp1, a byssal protein of the zebra mussel dreissena polymorpha. | the zebra mussel is one of only a few freshwater bivalves known to produce a byssus. this fibrous, proteinaceous and highly cross-linked structure allows the mussel to attach to a variety of substrata and contributes to its notoriety as a major freshwater biofouling species. we have successfully expressed a full-length version of dreissena polymorpha foot protein 1 (dpfp1), a putative byssal thread precursor, and have used the recombinant protein as an antigen for polyclonal antibody production. ... | 2000 | 11003818 |
| using zebra mussels to monitor escherichia coli in environmental waters. | use of the zebra mussel (dreissena polymorpha) as an indicator of previously elevated bacteria concentrations in a watershed was examined. the ability of the zebra mussel to accumulate and purge escherichia coli over several days was investigated in both laboratory and field experiments. in laboratory experiments, periodic enumeration of e. coli in mussels that had been exposed to a dilute solution of raw sewage demonstrated that (i) maximum concentrations of e. coli are reached within a few hou ... | 2001 | 11215649 |
| cryptosporidium parvum oocysts in zebra mussels (dreissena polymorpha): evidence from the st lawrence river. | molluscan shellfish can recover and concentrate environmentally derived waterborne pathogens and can be used for the sanitary assessment of water quality. oocysts of cryptosporidium parvum (genotype 1) were identified in zebra mussels (dreissena polymorpha) from the st. lawrence river, quebec. approximately 67 oocysts/ml of hemolymph and 129 oocysts/g of soft tissue were recovered. the adjusted concentration of oocysts per gram of tissue was 2.2 x 10(2), and approximately 4.4 x 10(2) oocysts wer ... | 2001 | 11293571 |
| use of zebra mussel (dreissena polymorpha) to assess trace metal contamination in the largest italian subalpine lakes. | trace metal (cd, co, cr, cu, hg, ni, pb and zn) contamination was evaluated in zebra mussels from the lakes maggiore, lugano, como, iseo and garda, which are located in the most highly populated and industrialised area in italy. zebra mussels from lake maggiore contained the highest concentrations (3.44, 1.51, 4.97, 0.158, 5.87, 346 microg g(-1) for cd, co, cr, hg, pb, zn, respectively) of all metals analysed except cu and ni. the lowest levels of most metals were in animals from garda and lugan ... | 2001 | 11444309 |
| ddt contamination in lake maggiore (n. italy) and effects on zebra mussel spawning. | zebra mussel (dreissena polymorpha) is commonly used as contaminant bioindicator in europe and north america. we used the zebra mussel to follow ddt pollution trends from 1996 to 1997 in pallanza bay, lake maggiore, near the inlet of the river toce, after a ddt-manufacturing plant discharging residues into a tributary of the river toce had closed down. ddt contamination fell off sharply outside the bay, but tissue concentrations of the parent compound and residues remained high in molluscs sampl ... | 2001 | 11680736 |
| field and laboratory studies of ophryoglena sp. (ciliata: ophryoglenidae) infection in zebra mussels, dreissena polymorpha (bivalvia: dreissenidae). | this study, conducted in the dnieper-bug canal in belarus, is the first to monitor the seasonal (june-november) dynamics of infection with the parasitic ciliate ophryoglena sp. in a zebra mussel (dreissena polymorpha) population. mean population prevalence and intensity of infection varied, respectively, from 11 to 62% and from 0.9 to 24.1 ciliates/mussel. mean prevalence was highly correlated with mussel length in mussels <20 mm (r(2)=0.97) and was lower in larger mussels. mean infection intens ... | 2002 | 12095236 |
| strong influences of larval diet history on subsequent post-settlement growth in the freshwater mollusc dreissena polymorpha. | a significant seasonal variation in size at settlement has been observed in newly settled larvae of dreissena polymorpha in lake constance. diet quality, which varies temporally and spatially in freshwater habitats, has been suggested as a significant factor influencing the life history and development of freshwater invertebrates. accordingly, experiments were conducted with field-collected larvae to test the proposal that diet quality can determine planktonic larval growth rates, size at settle ... | 2002 | 12396485 |
| histological analysis of trematodes in dreissena polymorpha: their location, pathogenicity, and distinguishing morphological characteristics. | four families of trematodes were observed in histological sections during a 1992-1997 investigation of the parasites of zebra mussels dreissena polymorpha. these included aspidogastridae, i.e., aspidogaster, echinostomatidae, bucephalidae, i.e., bucephalus polymorphus, and gorgoderidae, i.e., phyllodistomumfolium. this article describes the precise location of these trematodes in the tissues of d. polymorpha, provides graphic evidence of their effect on the organs they inhabit, and highlights th ... | 2002 | 12435120 |
| zebra mussels (dreissena polymorpha) as indicators of freshwater contamination with lindane. | zebra mussels are common freshwater mollusks in many european lakes and rivers. their abundance, wide distribution, and filtering activity make them good candidates to evaluate the contamination of freshwaters with environmental contaminants. the purpose of this work was to determine the kinetics of lindane in zebra mussels and compare laboratory results with in situ measurements. exposure was conducted in small tanks, under controlled experimental conditions. our results indicated that mussels ... | 2002 | 12483805 |
| accumulation of human waterborne parasites by zebra mussels (dreissena polymorpha) and asian freshwater clams (corbicula fluminea). | zebra mussels (dreissena polymorpha) and asian freshwater clams (corbicula fluminea) are nonindigenous invasive bivalves present in north american fresh waters that are frequently contaminated with human enteric parasites, cryptosporidium parvum and giardia lamblia. six-week laboratory exposure of d. polymorpha and corbicula fluminea to both parasites seeded daily at concentrations reported from surface waters demonstrated efficient removal of cryptosporidium parvum oocysts and g. lamblia cysts ... | 2003 | 12489009 |
| bioaccumulation and detoxication of nodularin in tissues of flounder (platichthys flesus), mussels (mytilus edulis, dreissena polymorpha), and clams (macoma balthica) from the northern baltic sea. | cyanobacterial hepatotoxin accumulation in mussels (mytilus edulis, dreissena polymorpha), clam (macoma balthica), and flounder (platichthys flesus) tissues was measured. flounder were caught with gillnets from the western gulf of finland on 21 august 1999, 25 july 2000, and 25 august 2000. blue mussels were collected from: (1) a steel cage at a depth of 3 m on 20 august 1999, (2) an enclosure at depths of 3-5 m, and (3) an artificial reef (wreck at 25-30 m) in the western gulf of finland betwee ... | 2002 | 12568468 |
| food quality controls reproduction of the zebra mussel (dreissena polymorpha). | species such as dreissena polymorpha sometimes contribute substantially in the transfer of primary to secondary production. during the ontogenetic cycle, the reproductive investment of adult mussels is one of the main parameters that affect recruitment success. we studied how food quality and temperature affect the reproductive investment in term of egg mass of d. polymorpha in a lake by sampling mussels monthly from 4 m and 15 m depths. temperature affected reproduction directly and also indire ... | 2003 | 12721821 |
| seasonal dynamics of endosymbiotic ciliates and nematodes in dreissena polymorpha. | we report the results of a two-year study in the svisloch river (minsk, belarus) on the dynamics of infection in dreissena polymorpha by nematodes and three ciliate species conchophthirus acuminatus, ophryoglena sp., and ancistrumina limnica. although these endosymbionts were present in most of the samples, their prevalence and infection intensity differed significantly. c. acuminatus and a. limnica infection intensities in both years of the study had a maximum in summer and were positively corr ... | 2003 | 12725815 |
| chromosome analysis of phyllodistomum folium (trematoda, gorgoderidae) infecting three european populations of zebra mussels. | the mitotic chromosome sets of the larval stages of phyllodistomum folium infecting three european populations of dreissena polymorpha were studied using conventional giemsa staining and karyometrical analysis. the karyotype, described herein for the first time, consisted of nine chromosome pairs (2 n=18). the chromosomes were comparatively small and measured from 1.19 micro m to 5.22 micro m. the first and second longest chromosome pairs were, respectively, approximately 20% and 18% of the mean ... | 2003 | 12736817 |
| ddt is still a problem in developed countries: the heavy pollution of lake maggiore. | the zebra mussel (dreissena polymorpha), one of the most widely used bioindicators of persistent organic pollutants, trace metals and radionuclides in several worldwide freshwater ecosystems, has been used to monitor ddt contamination trends in lake maggiore since 1996, caused by industrial effluents on a tributary of the river toce, one of the major affluents of the lake. dreissena specimens were collected at two sampling sites, one within the baveno bay, where the river toce flows, and the oth ... | 2003 | 12738285 |
| bioaccumulation of lead, cadmium, and lindane in zebra mussels (dreissena polymorpha) and associated risk for bioconcentration in tufted duck (aythia fuligula). | | 2003 | 12945847 |
| inducibility of the p-glycoprotein transport activity in the marine mussel mytilus galloprovincialis and the freshwater mussel dreissena polymorpha. | previous investigations directed to the determination of the p-glycoprotein (pgp) expression in aquatic organisms have indicated the possibility of the multixenobiotic resistance mechanism (mxr) induction as a response to organic pollution. however, in numerous cases no significant and/or no clear relationship between pgp contents and pollution level was detected. concerning these discrepancies the results of an extensive, 3-year study of the pgp mediated mxr induction in the selected freshwater ... | 2003 | 14568358 |
| genome size estimates for two important freshwater molluscs, the zebra mussel (dreissena polymorpha) and the schistosomiasis vector snail (biomphalaria glabrata). | the haploid genome sizes of two important molluscs were assessed by feulgen image analysis densitometry. the genome size of the zebra mussel (dreissena polymorpha), a prolific invader of north american lakes, was estimated to be 1c = 1.70 +/- 0.03 pg, and that of the freshwater snail biomphalaria glabrata, the predominant intermediate vector of the human parasite schistosoma mansoni, was estimated at 0.95 +/- 0.01 pg. these estimates will be important in future efforts in molluscan genomics, whi ... | 2003 | 14608401 |
| the intestinal parasite pomphorhynchus laevis (acanthocephala) from barbel as a bioindicator for metal pollution in the danube river near budapest, hungary. | concentrations of as, al, ag, ba, bi, cd, co, cr, cu, fe, ga, mg, mn, ni, pb, sb, sn, sr, tl, v and zn were analyzed by inductively coupled mass spectrometry (icp-ms) in the intestinal helminth pomphorhynchus laevis and its host barbus barbus. the fish were caught in the danube river downstream of the city of budapest (hungary). ten out of twenty one elements analyzed were found at higher concentrations in the acanthocephalan than in different tissues (muscle, intestine, liver and kidney) of bar ... | 2004 | 15016463 |
| retrospective monitoring of alkylphenols and alkylphenol monoethoxylates in aquatic biota from 1985 to 2001: results from the german environmental specimen bank. | breams (abramis brama) and zebra mussels (dreissena polymorpha) from freshwater, and common mussels (mytilus edulis) from marine ecosystems, archived in the german environmental specimen bankwere analyzed for the presence of 4-nonylphenol (np), 4-tert-octylphenol (op), nonylphenol monoethoxylate (np1eo), and octylphenol monoethoxylate (op1eo). the samples were collected in the german rivers elbe, rhine, and saar, and in lake belau between 1992 and 2001, as well as in the north sea and baltic sea ... | 2004 | 15074671 |
| species-specific responses to metals in organically enriched river water, with emphasis on effects of humic acids. | invertebrate communities in polluted rivers are often exposed to a wide variety of compounds. due to complex interactions, 'pollution tolerant' species are not necessarily the most tolerant species to toxicants tested under standard laboratory conditions. it was hypothesized that the distribution of species in polluted rivers is not only dependent on the tolerance of species to toxicants, but also on species-specific capacities to modify or compensate for negative effects of toxicants. to test t ... | 1999 | 15093066 |
| identification of the multidrug resistance-associated protein (mrp) related gene in red mullet (mullus barbatus). | multixenobiotic resistance mechanism (mxr) in aquatic organisms is mediated by the activity of the p-glycoprotein (pgp) transporter that binds and actively effluxes different chemicals out of cell. in addition to the pgp, several other, non-pgp transport proteins have been recently identified in different human and animal tissues. given their characteristics and tissue distribution we hypothesized that members of the so-called multidrug resistance-associated protein (mrp) family may be expressed ... | 2004 | 15178032 |
| human waterborne parasites in zebra mussels ( dreissena polymorpha) from the shannon river drainage area, ireland. | zebra mussels ( dreissena polymorpha) from throughout the shannon river drainage area in ireland were tested for the anthropozoonotic waterborne parasites cryptosporidium parvum, giardia lamblia, encephalitozoon intestinalis, e. hellem, and enterocytozoon bieneusi, by the multiplexed combined direct immunofluorescent antibody and fluorescent in situ hybridization method, and pcr. parasite transmission stages were found at 75% of sites, with the highest mean concentration of 16, nine, and eight c ... | 2004 | 15221465 |
| ddt in zebra mussels from lake maggiore (n. italy): level of contamination and endocrine disruptions. | the ddt contamination of lake maggiore (northern italy) has been monitored since a serious pollution event occurred in 1996. to assess the environmental risk associated with this contamination, bioaccumulation data coupled with histopathological markers were evaluated on zebra mussel populations from two different contaminated sites from april 2001 to april 2002. biomonitoring results showed high ddt pollution in 2001 because of a flood which transported ddts still contained in the sediments of ... | 2004 | 15261453 |
| assimilation and depuration of microcystin-lr by the zebra mussel, dreissena polymorpha. | zebra mussels (dreissena polymorpha) are an important component of the foodweb of shallow lakes in the netherlands, amongst others in lake ijsselmeer, an international important wetland. large numbers of ducks feed on these mussels in autumn and winter. the mussels are filter feeders and are exposed to high densities of cyanobacteria in summer and autumn. mussels and cyanobacteria both thrive in lake ijsselmeer. apparently the mussels are somehow protected against accumulation of harmful quantit ... | 2004 | 15312721 |
| polychlorinated naphthalenes and polychlorinated biphenyls in benthic organisms of a great lakes food chain. | invasion of zebra mussels, dreissena polymorpha, and round gobies, neogobius melanostomus, into the great lakes has altered the food web structure and thereby the pathways of toxic contaminants such as polychlorinated biphenyls (pcbs) and polychlorinated naphthalenes (pcns). in this study, concentrations of pcns and pcbs were measured in organisms of a great lakes benthic food chain encompassing zebra mussels. pcns were found in all of the benthic organisms, including phytoplankton, algae, amphi ... | 2004 | 15346781 |
| comet and micronucleus assays in zebra mussel cells for genotoxicity assessment of surface drinking water treated with three different disinfectants. | the aim of this research was to study the influence of classic (sodium hypochlorite and chlorine dioxide) and alternative (peracetic acid [paa]) disinfectants on the formation of mutagens in surface waters used for human consumption. for this proposal, in vivo genotoxicity tests (comet and micronucleus assay) were performed in an experimental pilot plant set up near lake trasimeno (central italy). the effects were detected in different tissues (haemocytes for the comet assay and gills for the mi ... | 2004 | 15364524 |
| comparison of rdna sequences from colchicine treated and untreated sporocysts of phyllodistomum folium and bucephalus polymorphus (digenea). | the most frequently used antimitotic agent in cytogenetic studies is colchicine. we investigated whether the initial treatment of trematodes for karyological analysis with colchicine would have mutagenic or degradational effect on rdna sequences. dreissena polymorpha is the intermediate host of phyllodistomum folium and bucephalus polymorphus, and the sporocyst stage of these trematode species develop, respectively, in the gills and gonads of this mussel. sporocysts of p. folium and b. polymorph ... | 2004 | 15468529 |
| perfluoroalkyl contaminants in a food web from lake ontario. | perfluorooctane sulfonate (pfos) is a persistent and bioaccumulative perfluorinated acid detectable in humans and wildlife worldwide that has alerted scientists to examine the environmental fate of other fluorinated organic contaminants. recently a homologous series of perfluoroalkyl carboxylates (pfcas) was detected in the arctic, yet little is known about their sources, breadth of contamination, or environmental distribution. in this study we analyzed for pfos, the homologous series of pfcas r ... | 2004 | 15543740 |
| evaluation of the role of black carbon in attenuating bioaccumulation of polycyclic aromatic hydrocarbons from field-contaminated sediments. | the significance of black carbon (bc) for the bioavailability of polycyclic aromatic hydrocarbons (pahs) was examined by using historically contaminated intact sediment cores in laboratory exposure experiments with the deposit-feeding amphipod monoporeia affinis. log values of amphipod biota-sediment accumulation factors (bsafs) were significantly related to log bc, whereas log bsafs were related to log octanol-water partition coefficients only in background sediments containing less bc. in the ... | 2004 | 15559275 |
| byssal detachment underestimates tolerance of mussels to toxic compounds. | mussels are sedentary organisms attached to solid substrata by means of byssus threads. mussels detached from their substratum tend to reattach by producing new byssus threads. therefore, in bioassays using mussels, if the test animals are in an unattached status, increased byssogenic activity would expose their soft body parts to the toxic compound used. we test the tolerance of two mussel species (mytilopsis leucophaeata and mytilus edulis) to an oxidizing biocide (chlorine) and show that deta ... | 2005 | 15664030 |
| use of transplanted zebra mussels (dreissena polymorpha) to assess the bioavailability of microcontaminants in flemish surface waters. | zebra mussels (dreissena polymorpha) were translocated in cages to 56 water bodies in flanders (belgium) during summer 2001. after six weeks, concentrations of polychlorinated biphenyls (pcbs), hexachlorobenzene (hcb), p,p'-dde, and trace metals were measured in the transplanted mussels. it was investigated whether total dissolved water and sediment pollutant levels or bioaccumulation factors (bafs) and biota-sediment accumulation factors (bsafs) were predictive for mussel tissue levels. the sam ... | 2005 | 15819201 |
| distribution of microcystins in a lake foodweb: no evidence for biomagnification. | microcystins, toxins produced by cyanobacteria, may play a role in fish kills, although their specific contribution remains unclear. a better understanding of the eco-toxicological effects of microcystins is hampered by a lack of analyses at different trophic levels in lake foodwebs. we present 3 years of monitoring data, and directly compare the transfer of microcystin in the foodweb starting with the uptake of (toxic) cyanobacteria by two different filter feeders: the cladoceran daphnia galeat ... | 2005 | 16052377 |
| ophryoglena hemophaga n. sp. (ciliophora: ophryoglenidae): a parasite of the digestive gland of zebra mussels dreissena polymorpha. | ophryoglena hemophaga n. sp. is described from a freshwater dreissena polymorpha population in the rhine delta of the netherlands. this is the first ophryoglenine species (order hymenostomatida, suborder ophryoglenina) recorded as a molluscan parasite. as is typical of ciliates in the suborder ophryoglenina, o. hemophaga exhibits a polymorphic life history with cystment and reproduction by palintomy. trophonts were observed within digestive gland lumina, and zebra mussel hemocytes were present i ... | 2005 | 16119892 |
| comparing grazing on lake seston by dreissena and daphnia: lessons for biomanipulation. | biomanipulation measures in lakes, taken to diminish algal blooms, have mainly been restricted to the reduction of zooplanktivorous fish with the aim to stimulate the grazing pressure by native filter feeders such as daphnia. however, larger filter feeders like the exotic zebra mussel, dreissena polymorpha, have been suggested as an optional tool because of their high filtering capacity. we compared grazing by two filter feeders, d. polymorpha and daphnia galeata, offered seston from lake ijssel ... | 2005 | 16184335 |
| screening of pop pollution by ache and erod activities in zebra mussels from the italian great lakes. | the increase of ethoxyresorufin dealkylation (erod) and the inhibition of acetylcholinesterase (ache) as biomarkers have been commonly used in vertebrates for the persistent organic pollutants (pops) biomonitoring of aquatic environments, but very few studies have been performed for invertebrates. previous researches demonstrated the interference due to some chemicals on erod and ache activities of the freshwater bivalve zebra mussel (dreissena polymorpha) in laboratory and field studies, showin ... | 2005 | 16263378 |
| a battery of in vivo and in vitro tests useful for genotoxic pollutant detection in surface waters. | since the 1980s, stricter water quality regulations have been promulgated in many countries throughout the world. we discuss the application of a battery of both in vivo and in vitro genotoxicity tests on lake water as a tool for a more complete assessment of surface water quality. the lake water concentrated by adsorption on c18 silica cartridges were used for the following in vitro biological assays: gene conversion, point mutation, mitochondrial dna mutability assays on the diploid saccharomy ... | 2006 | 16313981 |
| use of two biomarkers (cyp450 and acetylcholinesterase) in zebra mussel for the biomonitoring of lake maggiore (northern italy). | the use of zebra mussel dreissena polymorpha as a bioaccumulator for lipophilic compounds is nowadays standardized, but its employment in early warning systems by the biomarker approach is much less frequent. one of the main problems with the biomarker approach is due to natural variation of abiotic factors such as temperature that influence the activity of several enzymes. in this study, we investigated the influence of this environmental parameter on the activities of two different biomarkers: ... | 2006 | 16406590 |
| pseudodiarrhoea in zebra mussels dreissena polymorpha (pallas) exposed to microcystins. | microcystins are produced by bloom-forming cyanobacteria and pose significant health and ecological problems. in this study we show that zebra mussels respond differently to different strains of microcystis aeruginosa, and that a highly toxic strain causes zebra mussels to produce large quantities of mucous pseudofaeces, 'pseudodiarrhoea', that are periodically expelled hydraulically through the pedal gape by shell valve adductions rather than by the normal ciliary tracts. analysis of the pseudo ... | 2006 | 16481570 |
| a pollution-monitoring pilot study involving contaminant and biomarker measurements in the seine estuary, france, using zebra mussels (dreissena polymorpha). | zebra mussel (dreissena polymorpha) is an invasive species that has proliferated in european and north american rivers and lakes during the last century. in this study, d. polymorpha has been used to provide information on contamination levels and biological effects in the seine estuary (france). the bivalves accumulated polychlorinated biphenyls (pcbs) and polycyclic aromatic hydrocarbons (pahs) to a high degree with values reaching 800 ng/g dry weight for pcbs (sum of 20 congeners), and 1,000 ... | 2006 | 16494231 |
| phyllodistomum folium (trematoda: gorgoderidae) infecting zebra mussels (dreissena polymorpha) in the ebro river, spain. | zebra mussels (dreissena polymorpha) were first found in the ebro river (spain) in ribaroja reservoir, in the summer of 2001. this paper reports a study to detect parasites in this bivalve species. from september 2003 to august 2004, a total of 1380 zebra mussels were collected and dissected or sectioned in paraffin and haematoxylin and eosin staining. we observed the presence of phyllodistomum folium (olfers, 1816) in two hosts (prevalence 0.14%). sporocysts containing metacercariae were locate ... | 2006 | 16503186 |
| cadmium and zinc bioaccumulation and metallothionein response in two freshwater bivalves (corbicula fluminea and dreissena polymorpha) transplanted along a polymetallic gradient. | this study was designed to compare the metallothionein (mt) response capacity of two freshwater bivalves, corbicula fluminea and dreissena polymorpha, along an environmental gradient of polymetallic pollution. the bivalves were transplanted into 4 stations in southwestern france, with a cadmium and zinc pollution gradient. mt and metal concentrations were measured in the soft bodies of the clams and mussels over 2.5 months. in the zebra mussels, variations in mt concentrations were strictly corr ... | 2006 | 16545425 |
| molecular ecology of zebra mussel invasions. | the invasion of the zebra mussel, dreissena polymorpha, into north american waters has resulted in profound ecological disturbances and large monetary losses. this study examined the invasion history and patterns of genetic diversity among endemic and invading populations of zebra mussels using dna sequences from the mitochondrial cytochrome oxidase i (coi) gene. patterns of haplotype frequency indicate that all invasive populations of zebra mussels from north america and europe originated from ... | 2006 | 16599964 |
| phylogeography and systematics of zebra mussels and related species. | the genus dreissena includes two widespread and aggressive aquatic invaders, the zebra mussel, dreissena polymorpha, and the quagga mussel, dreissena bugensis. this genus evolved in the ponto-caspian sea basin, characterized by dynamic instability over multiple timescales and a unique evolutionary environment that may predispose to invasiveness. the objectives of this study were to gain insights into the demographic history of dreissena species in their endemic range, to reconstruct intraspecifi ... | 2006 | 16599965 |
| trophic transfer and biotransformation of polychlorinated biphenyls in zebra mussel, round goby, and smallmouth bass in lake erie, usa. | trophic transfer of polychlorinated biphenyl (pcb) congeners in zebra mussels (dreissena polymorpha), round gobies (neogobius melanstomus), and smallmouth bass (micropterus dolomieu) were assessed in four sites along the south shore of the west and central basin of lake erie (all sites were in oh, usa). total pcb levels in smallmouth bass (1,091-1,520 ng/g wet weight) and round gobies (118-256 ng/g wet weight) were similar among sites despite a west-to-east decrease in total pcb concentrations i ... | 2006 | 16629146 |
| histological changes and micronucleus induction in the zebra mussel dreissena polymorpha after paraquat exposure. | the herbicide paraquat (pq), still widely used in developing countries, represents a serious risk factor for human and environmental health. to test the sublethal effects of pq on the freshwater bivalve dreissena polymorpha, mussels were exposed to 0.125, 0.250, 0.500 mg/l for 7 and 14 days and histologically screened. pq's genotoxic potential was also determined in haemocytes by the micronucleus, mn, assay. at concentrations > or = 0.250 mg/l, severe lesions, such as cellular vacuolation, lysis ... | 2006 | 16691535 |
| assimilation efficiencies of cd and zn in the common carp (cyprinus carpio): effects of metal concentration, temperature and prey type. | the impact of several factors on the assimilation efficiency (ae) of cd and zn from food in the common carp (cyprinus carpio) was studied. tested prey species were midge larvae (chironomus riparius), zebra mussels (dreissena polymorpha) and oligochaetes (tubifex tubifex). the cd load of the larvae did not affect the cd ae in the carp. the zn ae however, was negatively related to the zn load of the prey. food quantity and starvation of the carp did not significantly affect the cd ae. for zn, a si ... | 2007 | 16764974 |
| dna adduct measurements in zebra mussels, dreissena polymorpha, pallas. potential use for genotoxicant biomonitoring of fresh water ecosystems. | the purpose of this study was to examine pah accumulation and bulky dna adduct formation in the digestive gland of zebra mussels exposed in their habitat or in controlled laboratory conditions to complex mixture of pah. dna adducts were measured using a 32p-postlabelling protocol with nuclease p1 enrichment adapted from reddy and randerath [reddy, m.v., randerath, k., 1986. nuclease p1-mediated enhancement of sensitivity of 32p-postlabelling test for structurally diverse dna adducts. carcinogene ... | 2006 | 16780971 |
| impacts of microcystins on the feeding behaviour and energy balance of zebra mussels, dreissena polymorpha: a bioenergetics approach. | microcystins are produced by bloom-forming cyanobacteria and pose significant health and ecological problems. to investigate the impacts of these biotoxins on the physiology of the zebra mussels, dreissena polymorpha, a series of short-term feeding experiments were conducted in the laboratory. we used five microalgal diets consisting of single-cell suspensions of the green algae, chlorella vulgaris, the diatom, asterionella formosa, the cryptophyte, cryptomonas sp. and two strains of the toxic c ... | 2006 | 16911837 |
| long-term response of dreissena polymorpha larvae to physical and biological forcing in a shallow lake. | müggelsee, a shallow eutrophic lake (berlin, germany), has been subject to global warming and concurrent reductions of anthropogenic nutrient loading during the past decades. here, we focus on the recent increase in abundance of dreissena polymorpha larvae. we aimed at ascertaining whether the change in abundance of larvae was driven by changes in climate, especially by climate warming, and/or by the concurrent changes in trophic state of the lake. both the numbers of small, newly developed larv ... | 2007 | 16964499 |
| control of microbial communities by the macrofauna: a sensitive interaction in the context of extreme summer temperatures? | climate models predict an increasing frequency of extremely hot summer events in the northern hemisphere for the near future. we hypothesised that microbial grazing by the metazoan macrofauna is an interaction that becomes unbalanced at high temperatures due to the different development of the grazing rates of the metazoans and the growth rates of the microbial community with increasing temperature. in order to test this hypothesis, we performed grazing experiments in which we measured the impac ... | 2007 | 16964501 |
| integrated use of biomarkers and bioaccumulation data in zebra mussel (dreissena polymorpha) for site-specific quality assessment. | one of the useful biological tools for environmental management is the measurement of biomarkers whose changes are related to the exposure to chemicals or environmental stress. since these responses might vary with different contaminants or depending on the pollutant concentration reached in the organism, the support of bioaccumulation data is needed to prevent false conclusions. in this study, several persistent organic pollutants -- 23 polychlorinated biphenyl (pcb) congeners, 11 polycyclic ar ... | 2006 | 16966160 |
| do zebra mussels (dreissena polymorpha) alter lake water chemistry in a way that favours microcystis growth? | this study examined possible relationships between the presence of zebra mussels (dreissena polymorpha) and microcystis spp. abundance. experiments were conducted in 12 microcosms designed to mimic shallow lake ecosystems. fresh, aerated water with phytoplankton (pseudokirchneriella spp. and microcystis spp.) was pumped into each microcosm daily to ensure zebra mussels were exposed to oxygen and food. microcosms containing zebra mussels experienced significantly higher fluxes of nitrate (p=0.019 ... | 2006 | 17011023 |
| comparison of key enzymes in the zebra mussel, dreissena polymorpha, the earthworm allolobophora chlorotica and chironomus riparius larvae. | the levels of the enzymes, glutathione s-transferase, catalase, nad(p)h-cytochrome c reductases, and dt-diaphorase were determined and compared in the tissues of three invertebrates commonly used in monitoring environmental quality: a freshwater mussel, dreissena polymorpha, the earthworm allolobophora chlorotica and the fourth instar of chironomus riparius. it was found that the activities of gst, catalase, and nad(p)-cytochrome c reductases were comparable in a. chlorotica and c. riparius, whe ... | 2007 | 17052754 |
| effects of increasing temperatures on population dynamics of the zebra mussel dreissena polymorpha: implications from an individual-based model. | zebra mussels (dreissena polymorpha, pallas, 1771) have had unprecedented success in colonizing european and north american waters under strongly differing temperature regimes. thus, the mussel is an excellent model of a species which is able to cope with increasing water temperatures expected under global change. we study three principle scenarios for successful survival of the mussel under rising temperatures: (1) no adaptation to future thermal conditions is needed, existing performance is gr ... | 2007 | 17096169 |
| in vivo exposure to microcystins induces dna damage in the haemocytes of the zebra mussel, dreissena polymorpha, as measured with the comet assay. | the comet assay was used to investigate the potential of the biotoxin microcystin (mc) to induce dna damage in the freshwater zebra mussel, dreissena polymorpha. mussels maintained in the laboratory were fed daily, over a 21-day period, with one of four strains of the cyanobacterium, microcystis aeruginosa. three of the strains produced different profiles of mc toxin, while the fourth strain did not produce mcs. the mussels were sampled at 0, 7, 14, and 21 days by withdrawing haemocytes from the ... | 2007 | 17163507 |
| identification of multixenobiotic defence mechanism (mxr) background activities in the freshwater bivalve dreissena polymorpha as reference values for its use as biomarker in contaminated ecosystems. | the biological defence mechanism called mxr or mxd for multixenobiotic resistance or defence protects cells against the entry and the accumulation of xenobiotics. as the defence is modulated by man made chemicals, mxr is used as a biomarker of organisms' exposure to environmental contamination. however, to reliably assess and evidence mxr induction, the use of a reference level is required. in this context, we focused on mxr background level in a freshwater bivalve, the zebra mussel dreissena po ... | 2007 | 17217984 |
| towards a validation of a cellular biomarker suite in native and transplanted zebra mussels: a 2-year integrative field study of seasonal and pollution-induced variations. | two of the questions raised in the validation process of biomarkers are their relevance in the identification and discrimination of environmental perturbations, and the influence of seasonal factors on these biological endpoints. determining the advantages and restrictions associated with the use of native or transplanted animals and comparing their responses is also needed. to obtain this information, a 2-year integrative field study was conducted in the vicinity of a nuclear power plant in nor ... | 2007 | 17313981 |
| prokaryotic gene profiling assays to detect sediment toxicity: evaluating the ecotoxicological relevance of a cell-based assay. | despite their complexity, ecotoxicological measurements using higher level responses remain a major tool in the assessment of ecosystem integrity. nevertheless, the past decade saw an increasing number of cell based testing systems have found widespread application in ecotoxicology. one such test is bacterial bioreporters carrying a stress sensitive promoter fused to an easily detectable reporter gene. in the presence of a specific toxic stress,the expression cassette is switched on and the repo ... | 2007 | 17396675 |
| evaluation of several priority pollutants in zebra mussels (dreissena polymorpha) in the largest italian subalpine lakes. | zebra mussel (dreissena polymorpha) has been used for the biomonitoring of several pops (pcbs, ddts, hcb and hchs) in the largest italian subalpine great lakes (lake maggiore, garda, como, iseo and lugano). samplings were carried out in april 2003 at 15 locations selected according to industrial and anthropic levels of lakes. results have pointed out high ddt levels in d. polymorpha specimens from lake maggiore (700-1400 ng/g lipids, 5-9 times higher than those measured in mussels of other itali ... | 2008 | 17561323 |
| biomarkers in zebra mussel for monitoring and quality assessment of lake maggiore (italy). | three different biomarkers (acetylcholinesterase (ache), ethoxy resorufin-o-deethylase (erod) and dna strand breaks) were measured in zebra mussel (dreissena polymorpha) specimens collected in april 2005 at six different sampling sites on lake maggiore, the second largest italian lake in terms of depth and volume, in order to assess the spatial variation of exposure to man-made contaminants. mussels maintained at fixed laboratory conditions were used as controls to eliminate potential interferen ... | 2007 | 17564842 |
| profiles of environmental and endogenous estrogens in the zebra mussel dreissena polymorpha. | contamination of freshwater environments by estrogenic compounds has led to concern over potential impacts on invertebrate species. the uptake of the environmental estrogen 17beta-estradiol (e2) by the freshwater bivalve dreissena polymorpha and the nature of estrogenic substances in tissues of d. polymorpha mussels collected from four freshwater sites were investigated. exposure of mussels to [(14)c]-e2 (7.5 ngl(-1), 13 days) revealed that the estrogen bioconcentrated 840+/-58 (males) and 580+/ ... | 2007 | 17582461 |
| exploration of structure-antifouling relationships of capsaicin-like compounds that inhibit zebra mussel (dreissena polymorpha) macrofouling. | macrofouling of aquatic man-made structures by zebra mussels (dreissena polymorpha) poses significant economic burdens on commercial freshwater shipping and facilities utilising raw water. the negative environmental impact of some current antifouling technologies has limited their use and prompted investigation of non-organometallic and non-oxidising antifoulants as possible environment-friendly alternatives. the plant-derived natural product capsaicin and 18 other compounds with one or more cap ... | 2007 | 17852065 |
| a social analysis of the bioinvasions of dreissena polymorpha in spain and hydrilla verticillata in guatemala. | human agency plays a key role in the processes of biological invasions. this comprises not only the human role in the configuration of driving forces or in the perception of the impacts, but also the conceptualization of alien species themselves as an environmental problem. this paper examines different stakeholders' positions in bioinvasion processes at different scales, and it looks at their relevance for the management of invasive species. it compares two cases: the invasion process of dreiss ... | 2007 | 17879125 |
| levels and congener profiles of polybrominated diphenyl ethers (pbdes) in zebra mussels (d. polymorpha) from lake maggiore (italy). | several congeners of polybrominated diphenyl ethers (pbdes) were monitored in 14 different sampling stations of lake maggiore, the second largest italian lake in regard to surface, volume and average depth, using the sentinel-organism zebra mussel (dreissena polymorpha). results revealed a moderate contamination with summation operatorpbde levels (bde-17, -28, -47, -66, -71, -85, -99, -100, -138, -153, -154, -183, -190 and -209) ranging from 40 to 447ngg(-1) lipid weight which are similar to tho ... | 2008 | 17997208 |
| molecular biomarkers of dreissena polymorpha for evaluation of renaturation success of a formerly sewage polluted stream. | the renaturation success of an urban stream, formally used for discharge of treated sewage waters was investigated by active biomonitoring with dreissena polymorpha based on molecular biomarkers and compared to a semi-natural stream and laboratory controls. response to pollution charges were analyzed by reverse transcriptase-pcr of heat-shock protein (hsp70), p-glycoprotein (p-gp), catalase (cat) and pi class glutathione s-transferase (pigst). hsp70 transcription was similarly induced at both si ... | 2008 | 18045758 |
| biomonitoring of surface and coastal water for cryptosporidium, giardia, and human-virulent microsporidia using molluscan shellfish. | surface inland and coastal waters in ireland were surveyed for the human waterborne enteropathogens; cryptosporidium parvum, giardia lamblia, encephalitozoon intestinalis, encephalitozoon hellem, and enterocytozoon bieneusi by utilizing bivalve mussel species, i.e., mytilus edulis (blue mussel), anodonta anatina (duck 'mussel', actually a unionid clam), and the invasive dreissena polymorpha (zebra mussel) as biomonitors at twelve sites located in three irish river-basin districts with various wa ... | 2008 | 18704498 |
| is meltwater from alpine glaciers a secondary ddt source for lakes? | a sharp increase in 2005 of pp'ddt and its metabolites was observed in mussels and fish from lakes como and iseo, the main glacier-fed southern alpine lakes. ddts in zebra mussels (dreissena polymorpha) were more than 150 times higher than levels in 2003, and concentrations in pelagic fish (0.12 mgkg(-1) w.w.) exceeded the italian safety threshold for human consumption (0.05 mgkg(-1) w.w.). the histological examination of the ovaries revealed many mussels with oocyte degeneration throughout the ... | 2008 | 18805565 |
| multi-xenobiotic-resistance a possible explanation for the insensitivity of bivalves towards cyanobacterial toxins. | filterfeeders, such as bivalves, are highly affected during toxic cyanobacterial blooms, as they are non-selective and may use the cyanobacteria as main nutrition source. the freshwater mussel dreissena polymorpha, living in lakes and rivers coexisting with cyanobacteria, was exposed to 100 microg l(-1) microcystin-lr (mc-lr) for up to three days. mc-lr concentration in mussel tissue and surrounding media was quantified by hplc-pda during uptake and depuration phase, revealing an immediate, cont ... | 2008 | 18930753 |
| [clonal and population rapd variation of cercariae obtained from bucephalus polymorphus sporocysts (trematoda: bucephalidae)]. | three arbitrary primers produced 114 rapd markers for 37 cercariae from nine bucephalus polymorphus sporocysts obtained from three dreissena polymorpha mollusks, which were collected in two water reservoirs of the volga basin. analysis of the rapd patterns established a unique genotype for each cercaria. the topology of an upgma dendrogram did not reliably differentiate the cercaria according to the corresponding sporocysts. however, three groups of genotypes were isolated and corresponded to th ... | 2009 | 19239100 |
| a multi-biomarker assessment of the impact of the antibacterial trimethoprim on the non-target organism zebra mussel (dreissena polymorpha). | a battery of eight biomarkers was applied in the freshwater mussel dreissena polymorpha to evaluate potential sub-lethal effects of the antimicrobial trimethoprim (tmp, 5-[3,4,5-trimethoxybenzyl]pyrimidine-2,4-diamine). mussels were exposed for 96 h to increasing concentrations (1, 3, 10 nm) of tmp in in vivo experiments. we determined the single cell gel electrophoresis (scge) assay, the micronucleus test (mn test), the apoptotic frequency (halo assay) and the lysosomal membrane stability (neut ... | 2009 | 19481616 |
| biotransformation and antioxidant enzymes of dreissena polymorpha for detection of site impact in watercourses of berlin. | this study investigated whether biotransformation and antioxidant enzymes of an organism tolerant to pollution such as the zebra mussel dreissena polymorpha can be employed to evaluate the extent of urban water pollution. activity changes of soluble and membrane bound glutathione s-transferase (s- and mgst), superoxide dismutase (sod), catalase (cat) and glutathione peroxidase (gpx) to environmental stress were explored in precultured mussels exposed for one day to one week at selected sites wit ... | 2009 | 19513445 |
| interactions between parasitism and biological responses in zebra mussels (dreissena polymorpha): importance in ecotoxicological studies. | given that virtually all organisms are hosts for parasites, the investigation of the combined effects of contamination and parasitism is important in the framework of aquatic bioindication procedures. to assess the impact of such multistresses at the host cellular level, we sampled parasitized zebra mussel (dreissena polymorpha) populations from two sites in northeast france that presented different levels of contamination. experimental groups were formed based on parasite species and host gende ... | 2009 | 19691958 |
| bucephalus polymorphus baer, 1827 - a new fish parasite in austria? | during parasitological studies of the invasive round goby fish species apollonia melanostoma (pallas, 1814) from the danube river in 2007 the digenean bucephalus polymorphus baer, 1827 was detected for the first time in austria. encysted metacercariae of the parasite were found on the fins, skin and gills of the fish. the occurrence of the parasite is strictly dependant on the zebra mussel dreissena polymorpha (pallas, 1771), which acts as the obligatory first intermediate host in its life cycle ... | 2009 | 19915818 |
| contaminant accumulation and multi-biomarker responses in field collected zebra mussels (dreissena polymorpha) and crayfish (procambarus clarkii), to evaluate toxicological effects of industrial hazardous dumps in the ebro river (ne spain). | large amounts of industrial waste containing high concentrations of mercury, cadmium and organochlorine residues were dumped in a reservoir adjacent to a chlorine-alkali plant in the village of flix(catalonia, spain), situated at the shore of the lower ebro river. effects of these contaminants to aquatic river invertebrates were assessed by integrating analyses of metals and organochlorine residues in field collected zebra mussels and crayfish with a wide range of biomarkers. biological response ... | 2010 | 19954812 |
| field evidence for a parasite spillback caused by exotic mollusc dreissena polymorpha in an invaded lake. | this study provides field evidence in support of the "parasite spillback hypothesis" that predicts a positive numerical response of native parasites to the presence of an exotic host that is competing for these parasites with native hosts. we examined the role that the exotic mollusc dreissena polymorpha (zebra mussel) plays as the second intermediate host of the echinostomatid trematode echinoparyphium recurvatum in lake naroch, belarus. we found that due likely to the disproportionately high a ... | 2010 | 20107837 |
| multi-biomarker approach to investigate the state of contamination of the r. lambro/r. po confluence (italy) by zebra mussel (dreissena polymorpha). | this study assesses the response of the zebra mussel (dreissena polymorpha) to chemical pollution derived from the r. lambro/r. po confluence, which is one of the most polluted aquatic environments in europe. the mussels were tested under laboratory conditions to water sampled in the spring and fall at three sites located upstream or downstream of the confluence or directly in r. lambro alone. we performed on mussel specimens a biomarker battery composed by eight different assays: single cell ge ... | 2010 | 20202670 |
| multi-biomarker approach for the evaluation of the cyto-genotoxicity of paracetamol on the zebra mussel (dreissena polymorpha). | paracetamol (pcm; n-(4-hydroxyphenyl)acetamide) is a widely used analgesic and antipyretic agent that is utilized in human medicine. its use is so widespread that it is constantly being introduced into global water bodies where it reaches concentrations up to several microgl(-1). a battery of eight biomarkers was applied in the freshwater bivalve dreissena polymorpha in order to evaluate its potential sub-lethal effect. mussels were exposed for 96h to increasing environmental concentrations (1, ... | 2010 | 20227746 |
| evaluation of 4-nonylphenol in vivo exposure in dreissena polymorpha: bioaccumulation, steroid levels and oxidative stress. | nonylphenol (np) represents the most critical metabolite of alkylphenols (aps) and alkylphenol ethoxylates (apes), non-ionic surfactants widely used in the formulation of domestic and industrial products. on the basis of in vitro and in vivo animal studies 4-nonylphenol (4-np) is considered an endocrine disrupting chemical (edc). the evidence to date indicates that mollusks are able to synthesize sex steroids from the precursor cholesterol and their endocrine pathways are theoretically susceptib ... | 2010 | 20388554 |
| defensin of the zebra mussel (dreissena polymorpha): molecular structure, in vitro expression, antimicrobial activity, and potential functions. | a 409 bp full length defensin gene was cloned and sequenced based on an expressed sequence tag (est) obtained from a normalized zebra mussel (dreissena polymorpha) foot cdna library developed in our laboratory. the d. polymorpha defensin (dpd) gene encoded a peptide with 76 amino acid residues. the mature dpd contains 54 amino acids with a fully functional insect defensin a domain. homologue searching against genbank database suggested that this dpd was phylogenetically close to defensins from a ... | 2010 | 20537393 |
| accumulation of a low pathogenic avian influenza virus in zebra mussels (dreissena polymorpha). | in order to investigate the potential role of mussels as a vector of influenza a viruses, we exposed zebra mussels (dreissena polymorpha) to natural lake water containing a low pathogenic h5n1 avian influenza virus. mussels were kept in water containing virus for 48 hr, then transferred into fresh water for another 14 days. virus detection in mussels and water samples was performed by quantitative real-time reverse transcriptase-pcr (qrrt-pcr) and egg culture methods. virus uptake was detected i ... | 2010 | 21313838 |
| chronic effects induced by ibuprofen on the freshwater bivalve dreissena polymorpha. | the sub-lethal effects induced by the non-steroidal anti-inflammatory drug ((nsaid) ibuprofen (ibu; ((±)-2-(p-isobutylphenyl) propionic acid))) were investigated using a battery of biomarkers on the freshwater bivalve dreissena polymorpha. according to the results from a semi-static in vivo approach, mussels were exposed for 96h to increasing levels of environmentally relevant ibu concentrations (0.2, 2 and 8μg/l, corresponding to 1, 9 and 35nm, respectively). cyto-genotoxicity was evaluated via ... | 2011 | 21550113 |
| Adaptation of freshwater mussels to cyanobacterial toxins: Response of the biotransformation and antioxidant enzymes. | Freshwater mussels such as the invasive Dreissena polymorpha and the indigenous Unio tumidus nourish by high filtration rates and may accumulate cyanobacteria and their toxins during cyanobacterial blooms. Physiological adaptations to cyanotoxins enable organisms to endure cyanobacterial blooms but may differ between species. Biotransformation and excretion capacities for cyanobacteria and anthropogenic pollutants have been demonstrated for Dreissena polymorpha but less for unionid species. This ... | 2011 | 22172521 |
| Is there a link between shell morphology and parasites of zebra mussels? | The shell morphology of zebra mussels, Dreissena polymorpha, was analyzed to determine if alterations in shell shape and asymmetry between valves were related to its infection status, i.e. infected or not by microparasites like ciliates Ophryoglena spp. or intracellular bacteria Rickettsiales-like organisms (RLOs), and by macroparasites like trematodes Phyllodistomum folium and Bucephalus polymorphus. For microparasites, two groups of mussels were observed depending on shell measurements. Mussel ... | 2011 | 22146241 |
| Exposure to human pharmaceuticals Carbamazepine, Ibuprofen and Bezafibrate causes molecular effects in Dreissena polymorpha. | Carbamazepine (CBZ), Ibuprofen (IBU) and Bezafibrate (BEZ) were tested for their potential to bioaccumulate and provoke molecular changes in the non-target organism Dreissena polymorpha. mRNA changes of enzymes and other proteins involved in the prevention from protein damage (heat shock protein 70, hsp70) and oxidative stress (superoxide dismutase, SOD; catalase, CAT; metallothionein, MT), biotransformation (pi-class glutathione S-transferase, piGST; aryl hydrocarbon receptor, AH-R), eliminatio ... | 2011 | 21872554 |
| Cross-effects of nickel contamination and parasitism on zebra mussel physiology. | Aquatic organisms are exposed to pollution which may make them more susceptible to infections and diseases. The present investigation evaluated effects of nickel contamination and parasitism (ciliates Ophryoglena spp. and intracellular bacteria Rickettsiales-like organisms), alone and in combination, on biological responses of the zebra mussel Dreissena polymorpha, and also the infestation abilities of parasites, under laboratory controlled conditions. Results showed that after 48 h, more organi ... | 2011 | 22076027 |
| factorial microarray analysis of zebra mussel (dreissena polymorpha: dreissenidae, bivalvia) adhesion. | the zebra mussel (dreissena polymorpha) has been well known for its expertise in attaching to substances under the water. studies in past decades on this underwater adhesion focused on the adhesive protein isolated from the byssogenesis apparatus of the zebra mussel. however, the mechanism of the initiation, maintenance, and determination of the attachment process remains largely unknown. | 2010 | 20509938 |
| differentiation of european freshwater bucephalids (digenea: bucephalidae) based on karyotypes and dna sequences. | three species of bucephalid digeneans are known in european freshwater habitats. in this study parthenitae of rhipidocotyle campanula (dujardin, 1845) and r. fennica gibson, taskinen & valtonen, 1992, infecting unionid bivalves, and adult bucephalus polymorphus von baer, 1827 from perch (perca fluviatilis l.) were investigated using karyological analysis and dna sequencing. our previously published data on genetic characteristics of parthenitae of b. polymorphus from dreissena polymorpha pallas ... | 2014 | 24474041 |
| involvement of apoptosis in host-parasite interactions in the zebra mussel. | the question of whether cell death by apoptosis plays a biological function during infection is key to understanding host-parasite interactions. we investigated the involvement of apoptosis in several host-parasite systems, using zebra mussels dreissena polymorpha as test organisms and their micro- and macroparasites. as a stress response associated with parasitism, heat shock proteins (hsp) can be induced. in this protein family, hsp70 are known to be apoptosis inhibitors. mussels were diagnose ... | 2013 | 23785455 |
| filtration effects of zebra mussels on pathogens and total bacterial burden in the odra lagoon (south baltic). | as a result of their mode of filter feeding, zebra mussels (dreissena polymorpha pall.) have been observed to purify natural water bodies and in vitro. therefore, the possibility of using zebra mussels for water purification was investigated in a slightly brackish water body of a large lagoon. in this study, water samples were taken above, near and at distance from zebra mussel beds (mb) in the odra lagoon in north east germany. near typical bacterial species like aeromonas spp. pathogenic bacte ... | 2015 | 25945852 |