an assessment of the toxicological significance of anthropogenic contaminants in canadian arctic wildlife.anthropogenic contaminants have been a concern in the canadian arctic for over 30 years due to relatively high concentrations of bioaccumulating and biomagnifying organochlorine contaminants (ocs) and toxic metals found in some arctic biota and humans. however, few studies have addressed the potential effects of these contaminants in canadian arctic wildlife. prior to 1997, biological effects data were minimal and insufficient at any level of biological organization. the present review summarize ...200516154621
development of fish mercury concentrations in finnish reservoirs from 1979 to 1994.mercury (hg) concentrations in burbot (lota lota), perch (perca fluviatilis), northern pike (esox lucius), roach (rutilus rutilus), whitefish (coregonus lavaretus) and peled (c. peled) were monitored in 18 reservoirs situated in western and northern finland over a period of 16 years (1979-1994). the reservoirs were impounded from 1964 to 1980. the surface areas ranged between 1 and 417 km2. data from downstream sites and reference lakes were compared to reservoir mercury data. generally, fish hg ...19989652133
triaenophorus nodulosus and t. crassus in fish from northern finland.10,288 fish specimens of 34 species from three water bodies in northern finland were studied mainly in 1978-1982 triaenophorus nodulosus and t. crassus parasites. six of the 31 species from the bothnian bay were found to harbour t. nodulosus plerocercoids, four of the 11 from the cold, oligotrophic lake yli-kitka in northeastern finland and only one of the 6 from the small, eutrophic lake kuivasjärvi. the ruff (gymnocephalus cernuus) was most essential intermediate host in the lakes, as supporte ...19892488051
geographic variation of chlorinated hydrocarbons in burbot (lota lota) from remote lakes and rivers in canada.the variation in levels of polychlorinated biphenyls (sigma pcbs), chlorobenzenes and chlorinated pesticides was studied in burbot (lota lota) from eight remote locations along a northwesterly transect from northwestern ontario to the mackenzie river delta in canada. significant declines in concentrations of pcb congeners, ddt isomers (sigma ddt), lindane, dieldrin, and mirex in burbot liver were found with increasing north latitude. mean sigma pcb concentrations ranged from 1,290 ng/g (lipid wt ...19902386409
[electron microscope investigation of bacteria associated with the tegument of the tapeworm species eubothrium rugosum, a parasite of the intestine of burbot].bacteria associated with the tegument of the tapeworm species eubothrium rugosum (cestoda, pseudophyllidea) parasitizing the intestine of burbot (lota lota) were studied using transmission and scanning electron microscopy. three morphological types of the bacteria were revealed. bacteria of the first type are localized between microtrichia and fit to them closely. bacteria of the second (gram-positive) and third (gram-negative) types are localized over microtrichia of the tegument and do not att ...200516134784
[trophic relationship in the system host (lota lota) - parasite (eubothrium rugosum): symbiont microflora in hydrolysis of food carbohydrate components]. 200617087012
temperature acclimation modifies na+ current in fish cardiac myocytes.the present study was designed to test the hypothesis that temperature acclimation modifies sarcolemmal na+ current (ina) of the fish cardiac myocytes differently depending on the animal's lifestyle in the cold. two eurythermal fish species with different physiological strategies for surviving in the cold, a cold-dormant crucian carp (carassius carassius l.) and a cold-active rainbow trout (oncorhynchus mykiss), were used in acclimation experiments. the ina of carp and trout were also compared w ...200415235011
[parasite fauna of the burbot lota lota l. in body of water of the kol'skiĭ peninsula].the results of a parasitological study of the burbot lota iota l. inhabiting the kola region are presented. 51 species of parasite were found on burbot in 16 waterbodies belonging to the white sea and barents sea basins (muxosporea - 7, suctoria - 1, peritricha - 6, monogenea - 1, cestoda - 6, trematoda - 13, nematoda - 6, acanthocephala - 5, hirudinea - 3, bivalvia - 1 and crustacea - 2 species). data on the infestation of burbot by different parasite species and their prevalence in investigate ...200616913298
natural transfer of helminths of marine origin to freshwater fishes with observations on the development of diphyllobothrium alascense.infective stages of helminths of 5 species that occur as adults in marine mammals were found in burbot, lota lota (l.) (gadidae), from the lower kuskokwim river (southwestern alaska): diphyllobothrium alascense rausch et williamson, 1958; pyramicocephalus phocarum (fabricius, 1780); corynosoma strumosum (rudolphi, 1801); corynosoma semerme (forsell, 1904); and pseudoterranova decipiens (krabbe, 1878). some larval stages were obtained also from smelt, osmerus mordax dentex steindachner, an anadro ...200010780552
parasites of the deepwater sculpin (myoxocephalus thompsonii) across its canadian range.deepwater sculpin (myoxocephalus thompsonii) were collected from 19 lakes across the species' distribution in canada and examined for parasites. six helminth species (crepidostomum farionis, bothriocephalus cuspidatus, proteocephalus sp., cyathocephalus truncatus, raphidascaris acus, and echinorhynchus salmonis), 1 crustacean species (ergasilus nerkae), and 1 molluscan species (glochidia) parasitized these hosts. crepidostomum farionis, proteocephalus sp., r. acus, e. nerkae, and the glochidia r ...200919382824
partial characterization of the thyroid proteinase of the burbot, lota lota l. 19734147937
[helminths fauna of fishes in the mała panew river drainage basin].a parasitological investigation was made at 420 fishes from 10 species: perca fluviatilis l., gymnocephalus cernuus (l.), gobio gobio (l.), tinca tinca (l.), leuciscus idus (l), noemacheilus barbatulus (l.), lota lota (l.), leucaspisus delineatus (heckell 843), blicca biorkna (l.) and rhodeus sericeus amarus (bloch 1782). the fishes were caught over one year period (1995-1996) in the mała panew river drainage basin (south poland). in examined fishes the following parasite species were found: dip ...200016886354
the effect of echinorhynchus borealis (acanthocephala) infection on the anti-predator behavior of a benthic benthic habitats, predators can generally not be detected visually, so olfaction may be particularly important for inducing anti-predation behaviors in prey organisms. manipulative parasites infecting benthic hosts could suppress these responses so as to increase the probability of predation and thus trophic transmission. we studied how infection with the acanthocephalan echinorhynchus borealis affects the response of the benthic amphipod pallasea quadrispinosa to water conditioned by burbot ...200818564759
prevalence of listeria monocytogenes in, and microbiological and sensory quality of, rainbow trout, whitefish, and vendace roes from finnish retail markets.the prevalence of listeria monocytogenes in retail roe, as well as the microbiological and sensory qualities of the roe, were studied for three fish species under three different storage conditions. a total of 147 finnish rainbow trout (oncorhynchus mykiss), whitefish (coregonus lavaretus), vendace (coregonus albula), and burbot (lota lota) roe samples were bought fresh, frozen, or frozen-thawed from finnish retail markets. the overall prevalence of l. monocytogenes was 5%; however, the prevalen ...200314572220
lysozyme activities and immunoglobulin concentrations in seminal plasma and spermatozoa of different teleost species and indications on its significance for sperm function.the occurrence of lysozyme and immunoglobulin (ig) in semen of different teleost species (brown trout-salmo trutta, perch-perca fluviatilis, burbot-lota lota) was studied. in all investigated species lysozyme activities (1.13-1.45 u ml(-1)) and ig concentrations (t-ig: 1.11-1.61 microg ml(-1), igg [measured only in brown trout]: 1.49 microg ml(-1)) were detected in seminal plasma. ig was also found in spermatozoa (t-ig: 0.234-0.357 microg/g protein, igg: 0.198 microg ml(-1)) while spermatozoal l ...201020416943
molecular faunistics of accidental infections of gyrodactylus nordmann, 1832 (monogenea) parasitic on salmon salmo salar l. and brown trout salmo trutta l. in nw russia.salmon salmo salar l. and brown trout s. trutta l. juveniles were examined for the presence of accidental monogenean ectoparasitic species of gyrodactylus nordmann, 1832 in the baltic and white sea basins of russian karelia in order to estimate the frequency of host-switching attempts on an ecological timescale. to collect phylogeographical information and for exact species identification, the parasites were characterised by nuclear internal transcribed spacer sequences of rdna (its) and, for so ...200818038199
[morphological characteristics and certain biological problems of the representatives of the genus apiosoma (infusoria, peritricha) from the young of predatory fishes].13 species of apiosoma were recorded from the young of esox lucius, lota lota and perca fluviatilis. 7 species were reported from lota lota, 9 species-from esox lucius and 6 species--from perca fluviatilis. apiosomes were found mainly on the body surface and fins of fishes and move seldom on their gills. under changing conditions the transition of parasites from one organ to another is possible. great morphological variability of apiosoma is reflected in variability of shape and size of the body ...1976138836
levels of ddt and hexachlorocyclohexane in burbot (lota lota l.) from russian arctic rivers.the concentrations of organochlorine pesticides (ocps =p,p'ddt, p,p'ddd, p,p'dde, alpha-hch and gamma-hch) were measured in the sediments, water and burbot (whole liver and liver lipids) of eight russian arctic rivers near their outflows to the arctic ocean between 1988 and 1994. ddt was not detected in any river sediments above the limit of quantification (loq) of 2.5 ng g(-1) dry wt. concentrations of ddd and dde were only found in three of the river sediments above the loq of 0.75 ng g(-1) dr ...200212146522
fasting reduces plasma leptin-and ghrelin-immunoreactive peptide concentrations of the burbot (lota lota) at 2 degrees c but not at 10 degrees c.the effects of fasting at two water temperatures (2 and 10 degrees c) on plasma leptin- and ghrelin-immunoreactive peptide concentrations and energy metabolism were investigated in the burbot (lota lota), a freshwater gadoid, which lives in cold waters and tolerates long periods of fasting. burbot were assigned to fed and fasted groups at 2 and 10 degrees c. leptin- and ghrelin-immunoreactive peptides were identified in burbot plasma. fasting at 2 degrees c reduced the plasma leptin- and ghrelin ...200314578571
establishment and partial characterization of a cell line from burbot lota lota maculosa: susceptibility to ihnv, ipnv and vhsv.this study describes the development and partial characterization of a continuous fibroblastic-like cell line (bef-1) developed from late stage embryos of north american burbot lota lota maculosa. this cell line has been maintained for over 5 yr and 100 passages in vitro. cells were cultured using eagle's minimum essential medium with earle's salts (mem) supplemented with glutamax, and 10% fetal bovine serum (fbs), ph 7.4. the addition of penicillin-streptomycin-neomycin (psn) antibiotic mixture ...201020597426
[pleistophora ladogensis sp. n., a microsporidian (protozoa, microsporidia) from the musculature of the burbot, lota lota, and of the smelt, osmerus eperlanus eperlanus ladogensis].the parasite develops inside the fibres of the cross-striated musculature. on the histologic sections of the affected tissue most young stages of p. ladogensis are represented by 2--6 nucleic cells 5--6 mu in size. mature pansporoblasts have a thick and solid membrane. their average size is 43 (18--60) mu. the number of spores in pansporoblasts is over 16. live spores are egg-shaped and are 5.4 (5.0--5.8).2.9 (2.7--3.3) mu in size. the length of the polar filament is 100 to 180 mu.1978151848
temperature and ca2+ dependence of [3h]ryanodine binding in the burbot (lota lota l.) heart.opening and closing of the cardiac ryanodine (ry) receptor (ryr) are coordinated by the free intracellular ca2+ concentration, thus making the ca2+ binding properties of the ryr important for excitation-contraction coupling. unlike mammalian cardiac ryrs, which lose their normal function at low temperatures, ryrs of ectothermic vertebrates remain operative at 2-4 degrees c, as indicated by ry sensitivity of contractile force. to investigate the mechanisms of low temperature adaptation of ectothe ...200616179490
the crossroads of molecular, typological and biological species concepts: two new species of gyrodactylus nordmann, 1832 (monogenea: gyrodactylidae).nucleotide sequences of nuclear ribosomal dna internal transcribed spacers (its) were used to confirm morphological identification of gyrodactylus species in fennoscandia. three pairs of morphologically similar or cryptic species are compared in this study. g. branchicus malmberg, 1964 and g. rarus wegener, 1910, hosted by the sticklebacks gasterosteus aculeatus l. and pungitius pungitius (l.), respectively, displayed a genetic divergence of 0.9-1.3% along 774 nucleotides of its (jukes & cantor ...200312815215
[proteolytic activity of microflora associated with digestive intestinal surface transportation of burbot lota lota parasitized by eubothrium rugosum]. 200314689729
[fatty acid composition of lecithin and cholesterol esters of high density lipoproteins from blood of humans, some mammals, and fish].fatty acid composition of lecithin and cholesterol esters was studied in high density lipoproteins obtained from blood serum of 20 male volunteers, 10 pigs, 10 rats and 30 burbots (lota lota); the study was carried out using isolation (precipitation) of the lipoproteins, thin-layer chromatography of lipoproteins and gas liquid chromatography of fatty acids. the findings suggest that the fatty acid composition of the preparations studied may serve as a more exact index of lipid metabolism than th ...19938279147
the impact of quorum sensing on the virulence of aeromonas hydrophila and aeromonas salmonicida towards burbot (lota lota l.) this study, the link between quorum sensing in aeromonas spp. and its virulence towards burbot (lota lota) was investigated. high mortality occurred in burbot juveniles challenged with aeromonas salmonicida hn-00, but not in juveniles challenged with aeromonas hydrophila ah-1n. meanwhile, both a. hydrophila ah-1n and a. salmonicida hn-00 were virulent towards larvae. the effect of quorum sensing on the virulence of a. hydrophila ah-1n towards burbot larvae was further investigated using quoru ...201222465799
electron microscopical identification of the flagellate spironucleus torosa (hexamitidae) from burbot lota lota (gadidae) with comments upon its probable introduction to this freshwater host.hexamitid flagellates from the rectum of the freshwater gadid burbot, from the river glomma in southeastern norway, were studied by scanning and transmission electron microscopy. the surface morphology of the flagellates was consistent with that of spironucleus torosa, previously only found in the cod, haddock, and saithe, all marine gadids. posteriolateral depressions with central protrusions were present in the flagellates, a feature reported from s. torosa only. further, the microtubular cyto ...19989794636
natural mixtures of persistent organic pollutants (pop) increase weight gain, advance puberty, and induce changes in gene expression associated with steroid hormones and obesity in female the present study, developmental and reproductive effects of lifelong exposure to environmental relevant concentrations of two natural mixtures of persistent organic pollutants (pop) were investigated using classical and molecular methods in a controlled zebrafish model. the mixtures used were extracted from burbot (lota lota) liver originating from freshwater systems in norway: one mixture with high levels and one mixture with background levels of polybrominated diphenyl ethers (pbde), polyc ...201020526952
concentrations of polychlorinated dibenzo-p-dioxins and furans in fish downstream from a ky-5 manufacturing.concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (pcdd/fs) were studied in seven fish species, burbot (lota lota), pike (esox lucius), perch (perca fluviatilis), pikeperch (stizopedion lucioperca), bream (abramis brama), salmon (salmo salar) and baltic herring (clupea harengus membras) in river kymijoki and its estuary polluted by ky-5 manufacturing. the fish were caught at 14 localities along the river and its estuary. the selected species represent different trophic levels ...200111372842
characterization of susceptibility and carrier status of burbot, lota lota (l.), to ihnv, ipnv, flavobacterium psychrophilum, aeromonas salmonicida and renibacterium this study, susceptibility and potential carrier status of burbot, lota lota, were assessed for five important fish pathogens. burbot demonstrated susceptibility and elevated mortality following challenge with infectious haematopoietic necrosis virus (ihnv) by immersion and to aeromonas salmonicida by intraperitoneal (i.p.) injection. ihnv persisted in fish for at least 28 days, whereas a. salmonicida was not re-isolated beyond 17 days post-challenge. in contrast, burbot appeared refractory t ...201020367740
further observations on the presence of wandering phagocytes within the teleostean retina.a previous report by this author has noted the presence of wandering phagocytes at the photo-receptor-retinal epithelial interface in five teleostean species. a further 5 species have now been investigated by electron microscopy and again all specimens examined consistently show the presence of this population of phagocytes. the new species studied are the goldeye (hiodon alosoides), the yellow eel (anguilla anguilla), the archer fish (toxotes jaculatrix), the goldfish (carassius auratus) and th ...19854073522
redescription of eubothrium fragile (rudolphi, 1802) and e. rugosum (batsch, 1786) (cestoda: pseudophyllidea), parasites of fish in the holarctic region.two fish cestodes, the little-known eubothrium fragile (rudolphi, 1802) and e. rugosum (batsch, 1786), the type species of the genus eubothrium nybelin, 1922, are redescribed on the basis of new material from twaite shad, alosa fallax (lacépède, 1803), from england and burbot, lota lota (linnaeus, 1758), from russia, respectively. the tapeworms are compared with two other species of the genus, e. crassum (bloch, 1779) and e. salvelini (schrank, 1790), common parasites of salmonid fish in the hol ...200516270806
high prevalence of infections and pathological changes in burbot (lota lota) from a polluted lake (lake mjøsa, norway).the aim of the present study was to investigate whether exposure to high levels of persistent organic pollutants (pops) affected a fish population in lake mjøsa. lake mjøsa is known to be contaminated by polybrominated diphenyl ethers (pbdes), a subgroup of brominated flame retardants from local industrial activities. fish from lake losna, a less contaminated lake located close to lake mjøsa, was used as reference (control). the sampling of burbot (lota lota) was carried out between 2005 and 200 ...201323149183
comparison of sarcoplasmic reticulum calcium content in atrial and ventricular myocytes of three fish species.ryanodine (ry) sensitivity of cardiac contraction differs between teleost species, between atrium and ventricle, and according to the thermal history of the fish. the hypothesis that variability in ry sensitivity of contraction is due to species-specific, chamber-specific, and temperature-related differences in the sarcoplasmic reticulum (sr) ca(2+) content, was tested by comparing steady-state (ss) and maximal (max) ca(2+) loads of the sr in three teleost fish, rainbow trout (oncorhynchus mykis ...200919692664
transcriptional regulation in liver and testis associated with developmental and reproductive effects in male zebrafish exposed to natural mixtures of persistent organic pollutants (pop).persistent organic pollutants (pop) occur as mixtures in nature and it is difficult to predict the toxicity of such mixtures based on knowledge about toxicity and mechanisms of action for single compounds. the present knowledge on the combined toxic effects and modes of actions of exposure to mixtures is limited. thus, the scientifically based hazard and risk assessment of pop requires analytical and toxicological data from studies with environmental mixtures of pop. the application of genome wi ...200919184727
arsenic speciation patterns in freshwater fish.muscle of 16 freshwater fish (9 different species belonging to 4 different families) was analysed for arsenic species using hplc separation (anion and cation exchange) followed by on-line uv-decomposition, hydride generation and afs detection. the main arsenic compounds found in the extracts were arsenobetaine (asb), which accounted for 92-100% of extractable arsenic in species of salmonids (salmo marmoratus, oncorhynchus mykiss, salmo trutta m. fario), and dimethylarsinic acid (dmaa), which acc ...200418969382
amylolytic activity in fish intestinal mucosa: temperature effects.the activity, temperature characteristics and energy of activation of amylolytic enzymes in the intestinal mucosa were studied in six species of fish living in a boreal zone [burbot (lota lota l.), northern pike (exos lucius l.), perch (perca fluviatilis l.), bream (abramis brama l.), roach (rutilis rutilis l.), and carp (cyprinus carpio l.)] and in three species from tropical and subtropical areas [pilchard (sardina pilchardus w.), jack mackerel (trachurus trecae c.) and round sardinella (sardi ...200312628384
[analysis of parasitic communities in fishes from lake baikal].analysis of infracommunities and component communities of fish parasites in lake baikal has been conducted for the first time. it has been revealed that parasite infracommunities for the majority of baikal fishes are weakly balanced and impoverished (the berger-parker index is > 0.5; evension is < 0.5; the brillouin index is < 1). the highest diversity and balance of the communities are characteristic for carnivorous fishes (brachymystax lenok, hucho taimen, thymallus arcticus, esox lucius, and ...200716755724
species- and chamber-specific responses of 12 kda fk506-binding protein to temperature in fish heart.the sarcoplasmic reticulum (sr) ca(2+) release channel or ryanodine receptor (ryr) of the vertebrate heart is regulated by the fk506-binding proteins, fkbp12 and fkbp12.6. this study examines whether temperature-related changes in the sr function of fish hearts are associated with changes in fkbp12 expression. for this purpose, a polyclonal antibody against trout fkbp12 was used to compare fkpb12 expression in cold-acclimated (4 °c, ca) and warm-acclimated (18 °c, wa) rainbow trout (oncorhynchus ...201424048915
temperature dependence of sarco(endo)plasmic reticulum ca2+ atpase expression in fish hearts.cardiac function in fish acclimates to long-term temperature shifts by generating compensatory changes in structure and function of sarcoplasmic reticulum (sr) including the sarco(endo)plasmic reticulum ca(2+)-atpase (serca2). the current study compares temperature responses of the cardiac serca in two fish species, burbot (lota lota) and crucian carp (carassius carassius), which differ in regard to thermal tolerance and activity pattern. burbot are cold stenothermal and cold-active, while cruci ...201323239195
new technique for fertilizing eggs of burbot, asp and ide under hatchery conditions.the development of a new protocol for egg fertilization may increase embryo survival and benefit the aquaculture process. in the present study, a new technique of partially adding sperm to activated eggs in the artificial fertilization of burbot (lota lota), ide (leuciscus idus) and asp (aspius aspius) eggs was evaluated. if the same volume of sperm was divided into two or three parts and added to eggs in 30-60s intervals, it significantly improved embryo survival at the eyed-egg-stage of develo ...201627470201
dietary habits of invasive ponto-caspian gobies in the croatian part of the danube river basin and their potential impact on benthic fish communities.invasive ponto-caspian (p-c(1)) gobies have recently caused dramatic changes in fish assemblage structures throughout the danube basin. while their presence in the croatian part of the basin has been noted and distribution studied, their dietary habits and impacts on native fish communities have, until now, been unknown. in 2011, 17 locations in the sava river basin were sampled for fish and 15 for benthic invertebrates. fish population monitoring data, available for nine seasons (2003-2006 and ...201626054972
mycobacterium salmoniphilum infection in burbot lota lota.burbot lota lota sampled from lakes mjosa and losna in southeastern norway between 2005 and 2008 were found to be infected with mycobacterium salmoniphilum at a culture-positive prevalence of 18.6 and 3.3%, respectively. the condition factor (cf) of mycobacteria-affected fish sampled from mjøsa in 2008 was lower than the average cf of total sampled fish the same year. externally visible pathological changes included skin ulceration, petechiae, exopthalmia and cataract. internally, the infections ...201121797036
phylogenetic analysis of the ssu rrna gene from the piscine diplomonad spironucleus torosus (diplomonadida: hexamitinae).previous studies have recorded spironucleus torosus poynton et morrison, 1990 from several species of gadoid fishes, including the only freshwater gadoid, the burbot lota lota (l.). two morphologically different isolates of s. torosus have been described (elongate and pyriform). both have been found in saltwater, while only the elongate has been found in freshwater. to address the conspecificity of the two morphs of s. torosus, and to identify the source of s. torosus in burbot in norway, we hav ...200718303769
phylogenetic relationships among palearctic and nearctic burbot (lota lota): pleistocene extinctions and recolonization.the burbot (lota lota linnaeus, 1758) is the only freshwater species from the cod family. various taxonomic hypotheses were tested against molecular data by sequencing the mitochondrial cytochrome b locus of 120 burbot from 41 populations together with the related species molva molva (ling) and brosme brosme (tusk), which represented the other lotinae genera. within the genus lota two distinct phylogroups were observed: one in north america south of the great slave lakes (lota lota maculosa) and ...200314615196
prevalence of diphyllobothrium latum (cestoda: diphyllobothriidae) plerocercoids in fish species from four italian lakes and risk for the recent years there has been a re-emergence of diphyllobothriasis by diphyllobothrium latum (cestoda: diphyllobothriidae) in italy, france and switzerland, where in the past this fish-borne zoonosis was widespread and then virtually disappeared. a change in eating habits such as the consumption of raw/undercooked freshwater fish, has led to an increased risk for consumers of ingesting infective larvae of d. latum. a survey on the factors responsible for the re-emergence of human diphyllobothri ...201627491055
environmental contaminants in fish and their associated risk to piscivorous wildlife in the yukon river basin, alaska.organochlorine chemical residues and elemental contaminants were measured in northern pike (esox lucius), longnose sucker (catostomus catostomus), and burbot (lota lota) from 10 sites in the yukon river basin (yrb) during 2002. contaminant concentrations were compared to historical yrb data and to toxicity thresholds for fish and piscivorous wildlife from the scientific literature. a risk analysis was conducted to screen for potential hazards to piscivorous wildlife for contaminants that exceede ...200617009129
heavy metal and trace element bioaccumulation in target tissues of four edible fish species from the danube river (serbia).pikeperch (sander lucioperca), european catfish (silurus glanis), burbot (lota lota), and common carp (cyprinus carpio) were collected from the danube river (belgrade section, serbia), and samples of liver, muscle, and gills were analyzed for al, as, b, ba, cd, co, cr, cu, fe, hg, li, mn, mo, ni, pb, se, sr, and zn using inductively coupled plasma optical emission spectrometry (icp-oes) to highlight the importance of species and tissue selection in monitoring research, contaminant studies, and h ...201324054751
natural mixtures of pops affected body weight gain and induced transcription of genes involved in weight regulation and insulin signaling.obesity is reaching epidemic proportions worldwide, and is associated with chronic illnesses such as diabetes, cardiovascular disease, hypertension and dyslipidemias (metabolic syndrome). commonly held causes of obesity are overeating coupled with a sedentary lifestyle. however, it has also been postulated that exposure to endocrine disrupting chemicals (edcs) may be related to the significant increase in the prevalence of obesity and associated diseases. in the present study, developmental and ...201121356182
heavy metal contamination in the taimyr peninsula, siberian arctic.the taimyr peninsula is directly north of the world's largest heavy metal smelting complex (norilsk, russia). despite this proximity, there has been little research to examine the extent of contamination of the taimyr peninsula. we analyzed heavy metal concentrations in lichen (cetraria cucullata), moss (hylocomium splendens), soils, lake sediment, freshwater fish (salvelinus alpinus, lota lota and coregonus spp.) and collared lemming (dicrostonyx torquatus) from 13 sites between 30 and 300 km f ...200312493191
comparative baseline levels of mercury, hsp 70 and hsp 60 in subsistence fish from the yukon-kuskokwim delta region of subsistence fish; northern pike (esox lucius), burbot (lota lota), whitefish (coregonus nelsoni), grayling (thymallus arcticus) and sheefish (stenodus lencichthys), we determined the hsp 60 and hsp 70 levels in 31 samples from adult fish gills. a dot-blot analysis using antibodies to either hsp 70 or hsp 60 showed the average hsp 70 concentration was 9.1 microg/mg protein, while the average hsp 60 concentration was 147.4 microg/mg protein. mercury levels in muscle tissue in these fish average ...199910622434
bioenergetics and growth of young-of the-year northern pike (esox lucius) and burbot (lota lota) exposed to metal mining effluent.we hypothesized that exposure to metal mining effluent would reduce the ability of young-of-the-year fishes to accumulate energy reserves to survive the overwinter period (known as "winter stress syndrome") in a canadian boreal forest watershed. northern pike (esox lucius) and burbot (lota lota) were collected immediately before and after winter from a reference lake and two lakes receiving effluent. unexpectedly, total body lipid and triglyceride, and liver triglyceride levels were greater in e ...200717368537
mercury trends in predatory fish in great slave lake: the influence of temperature and other climate we report on trends in mercury (hg) concentrations in lake trout (salvelinus namaycush), burbot (lota lota), and northern pike (esox lucius) from great slave lake, located in the mackenzie river basin (mrb) and investigate how climate factors may be influencing these trends. hg concentrations in lake trout and burbot increased significantly over the early 1990s to 2012 in the two major regions of the lake; no trend was evident for northern pike over 1999-2012. temporal variations in hg conc ...201324111928
comparison of chloroform-methanol-extracted and solvent-free triglyceride determinations in four fish species.lipids, including triglycerides, are important variables in fish bioenergetics and can be used to estimate overall fish condition. triglycerides are the major energy storage form in fish and therefore are a more ecologically and physiologically relevant measure of bioenergetics than total lipids. chloroform-methanol-extracted total body lipids (bligh and dyer) and total body triglycerides determined in chloroform-methanol extracts and unextracted whole-body fractions were measured in four fish s ...200718201059
potential health risks posed by polycyclic aromatic hydrocarbons in muscle tissues of fishes from the athabasca and slave rivers, canada.polycyclic aromatic hydrocarbons (pahs) are released to the environment from oil sands operations and from natural sources in alberta, canada. concentrations of 16 usepa priority pahs were measured in tissues of fishes collected from three locations on the athabasca river in alberta and two downstream locations on the slave river in the northwest territories, canada. a total of 425 individual fish were collected including 89 goldeye (hiodon alosoides), 93 whitefish (coregonus clupeaformis), 104 ...201726972698
the dependence on temperature and ph of the effects of zinc and copper on proteolytic activities of the digestive tract mucosa in piscivorous fish and their potential preys.the dependence of the effects of zinc and copper on the activities of proteinases of the stomach and intestinal mucosa on temperature and ph in four species of boreal piscivorous fish (pike esox lucius, zander zander lucioperca, perch perca fluviatilis and burbot lota lota) as well as in some of their potential preys (kilka clupeonella cultriventris, ruff gymnocephalus cernuus, perch and roach rutilus rutilus) was investigated. species-specific differences of the effects of these heavy metals up ...201019731060
oxygen dissociation and content of blood from alaskan burbott (lota lota), pike (esox lucius) and grayling (thymallus arcticus). 19734148985
bioaccumulation of pcbs in burbot (lota lota l.) after delivery in natural food.burbot (lota lota) caught from lake päijänne, central finland, were exposed under laboratory conditions to four polychlorinated biphenyl (pcb) congeners delivered through diet, and accumulation of congeners to muscle, intestine, gonads, and liver were determined. the selected pcb congeners (pcb18, pcb44, pcb137, and pcb169) were added to intact dead vendace (coregonus albula) and burbot were fed 5 or 10 contaminated meals (2- and 4-week experiment, respectively). concentrations of fed congeners ...200516001148
endocrine effects of real-life mixtures of persistent organic pollutants (pop) in experimental models and wild fish.a series of studies have assessed the occurrence, levels, and potential adverse effects of persistent organic pollutants (pop) in fish from lake mjøsa. in this lake, high levels of various pop were detected in biota. fish from the nearby lake losna contain background levels of pop and served as reference (controls) in these studies. significantly higher prevalence of mycobacteriosis and pathological changes were documented in burbot (lota lota) from mjøsa compared to burbot from losna. further, ...201627484136
natural mixtures of persistent organic pollutants (pops) suppress ovarian follicle development, liver vitellogenin immunostaining and hepatocyte proliferation in female zebrafish (danio rerio).persistent organic pollutants such as polychlorinated biphenyls (pcbs), polybrominated diphenyl ethers (pbdes) and dichlorodiphenyltrichloroethane (ddt) are present in high concentrations in livers of burbot (lota lota) in lake mjøsa, norway. in order to assess effects of such pollutants on fish gonadal morphology, female zebrafish were exposed in two generations by food to mixtures of pollutants extracted from livers of burbot from lake mjøsa (high and low dose) and lake losna, which represents ...201222459409
comparative study on acid-induced gelation of myosin from atlantic cod (gardus morhua) and burbot (lota lota).physicochemical and rheological properties of myosin from atlantic cod and burbot during acid-induced gelation at room temperature (22-23°c) by d-gluconic acid-δ-lactone (gdl) were monitored. turbidity and particle size of both myosins increased and salt soluble content decreased when ph decreased, suggesting the formation of protein aggregates caused by acidification. the formation of disulphide bonds in myosin gelation was induced by acid. ca(2+)-atpase activity of myosin decreased (p<0.05), w ...200826054263
two novel microsporidia in skeletal muscle of pike-perch sander lucioperca and burbot lota lota in finland.two new species of microsporidia were recognized in skeletal muscle of freshwater fishes from finland. myosporidium spraguei n. sp. from pike-perch sander lucioperca occurred as mature spores within sporophorous vesicles (spvs) within a xenoma. the ovoid spores were 3.8 μm long and 2.4 μm wide, based on transmission electron micrographs (tem). the exospore and endospore were equally thick, the nucleus was monokaryotic and the polar filament was isofilar with 12 coils in a single rank, entirely a ...201727650692
burbot, lota lota, l., larvae requirements for artemia sp. nauplii during experimental rearing in laboratory conditions. 201325141707
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