| [the oncomiracidium of ancyrocephalus paradoxus creplin, 1839 (monongenea, monopisthocotylea), parasite of sander lucioperca (teleostei, percidae)]. | the distribution of ciliated cells and the oncomiracidium chaetotaxy in ancyrocephalus paradoxus creplin, 1839 (ancyrocephalidae) parasite of sander lucioperca (teleostean, percidae) are described for the first time as well as the larval ciliated cells in dactylogyrus extensus (dactylogyridae) parasite of cyprinus carpio. also is given a description of the larval haptorial armature of ancyrocephalus paradoxus which shows some original features in our region. the ciliated cell pattern and chaetot ... | 1977 | 603199 |
| [the occurrence of parasites in the bream (abramis brama l.), roach (rutilus rutilus l.) and perch (stizostedion lucioperca l.) in the włocławek dam reservoir on the vistula river]. | | 1988 | 3388868 |
| survey of the paratenic hosts of anguillicola crassus in lake velence, hungary. | anguillicola crassus infection of paratenic hosts was investigated in lake velence, hungary, in october 1992. a total of 155 specimens of 8 species (gymnocephalus cernuus, lepomis gibbosus, stizostedion lucioperca, abramis brama, alburnus alburnus, cyprinus carpio, pseudorasbora parva and rutilus rutilus) were examined: all species proved to be infected. there were large differences in the prevalence of infection among fishes, but the prevalence was generally higher in perciform fishes and it wa ... | 1994 | 7810405 |
| similarities and differences between the massive eel (anguilla anguilla l.) devastations that occurred in lake balaton in 1991 and 1995. | in the past few years, two massive eel (anguilla anguilla l.) devastations occurred in lake balaton, hungary. in 1991, 300 tons of eel perished in the western basin of the lake, while in the summer of 1995 30 tons of eel died in the eastern part of the lake. investigations carried out to find the causes of these ecocatastrophes included measurements of certain biochemical parameters: the blood sugar level, and the acetylcholinesterase (ache, ec 3.1.1.7), lactate dehydrogenase (ldh, ec 1.1.2.3), ... | 1997 | 9212331 |
| isolation of an iridovirus from pike-perch stizostedion lucioperca. | we have isolated a large virus from pike-perch stizostedion lucioperca fingerlings with no signs of disease. the biochemical structural, and serological properties of this newly isolated virus suggest that it belongs to the family iridoviridae. the virus multiplied and was cytopathogenic in several cultured fish cell lines. the virus has a dna-containing genome and is assembled in the cytoplasm. when viewed in electron micrographs, the assembly sites showed a paracrystalline array of hexagonal n ... | 1998 | 9696629 |
| the contribution of a pyrethroid insecticide to the massive eel (anguilla anguilla) devastation, in lake balaton, in 1995. | in the summer of 1995, 30 tonnes of eel (anguilla anguilla) died in lake balaton, hungary. an investigation was carried out to find the causes of this ecocatastrophe. during this investigation, certain biochemical parameters, i.e. the blood sugar level, the acetylcholinesterase (ache, ec 3.1.1.7), lactate dehydrogenase (ldh, ec 1.1.2.3), glutamic-oxaloacetic transaminase (got, ec 2.6.1.1), and glutamic-pyruvic transaminase (gpt, ec 2.6.1.2) activities in the blood serum of the collected survivin ... | 1999 | 10574437 |
| [eight new species of coccidia (sporozoa, coccidia) in fishes from the continental waters of russia]. | description of coccidian species infecting freshwater fishes is given. localities: neman river, goussia peleci sp. n.--oocyst 37.5-45 x 35-42.5 microns, oocyst residuum (or) absent, sporocysts 20-22.5 x 15-17.5 microns, stieda body (sb) absent, sporocyst residuum (sr) present, host (h)--pelecus cultratus; g. cultrati sp. n.--oocyst 22.5-30 microns, or absent, sporocysts 12.5 x 15 microns, sr, sb absent, wall 2-2.5 microns, h--p. cultratus; g. arinae sp. n.--oocyst 12.5 x 17.5 microns, or present ... | 2001 | 11558339 |
| monitoring of organochlorine pesticide residues in pikeperch, stizostedion lucioperca l. in beysehir lake (central anatolia). | fishes in beysehir lake were analysed to determine organochlorine pesticide residues. the more frequently detected compounds are ddt complex (ddt, ddd, dde and isomers), total hch complex (alpha-hch, beta-hch and gamma-hch or lindane), aldrin, dieldrin, endrin and heptachlorine. eighty five percent of the fish samples were found to be contaminated. while 75% of the total samples were contaminated by one or more hch isomers, 63% of the organochlorinated pesticide is ddt and its metabolites. aldri ... | 2002 | 12088365 |
| fish status survey of nordic lakes: effects of acidification, eutrophication and stocking activity on present fish species composition. | the status of fish populations in 3821 lakes in norway, sweden and finland was assessed in 1995-1997. the survey lakes were chosen by stratified random sampling from all (126 482) fennoscandian lakes > or = 0.04 km2. the water chemistry of the lakes was analyzed and information on fish status was obtained by a postal inquiry. fish population losses were most frequent in the most highly acidified region of southern norway and least common in eastern fennoscandia. according to the inquiry results, ... | 2003 | 12733793 |
| effects of fish stocking on ecosystem services: an overview and case study using the stockholm archipelago. | in this article, we focus on documented and possible effects of fish stocking in terms of ecosystem services. the increasing use of fish stocking between 1970 and 2000 in the semiurban setting of stockholm archipelago, sweden, is used as case study. the objective is to analyze this management practice from an ecosystem perspective, accounting for both the ecological and social context of releasing fish. the results show that enhancements of four native species (salmo s. trutta, salmo salar, stiz ... | 2004 | 15156349 |
| toward adaptive management: the impacts of different management strategies on fish stocks and fisheries in a large regulated lake. | we applied the adaptive management approach to analyze the demand and feasibility of adaptive management of fish stocks in a large regulated lake, oulujärvi, in northern finland. the process consisted of four phases: (1) analysis of the current state of the fisheries system (fishers, related markets and industry, fisheries researches and authorities, related organizations, etc.); (2) analysis of the objectives of different stakeholders; (3) the composition of alternative management strategies an ... | 2004 | 15517682 |
| parasite fauna of selected fish species of lake miedwie. | a total of 136 fishes, representing 9 species (perch, perca fluviatilis l.; pike, esox lucius l.; european eel, anguilla anguilla (l.); common bream, abramis brama (l.); roach, rutilus rutilus (l.); tench tinca tinca (l.); european whitefish, coregonus lavaretus (l.); vendace, coregonus albula (l.); and zander, sander lucioperca (l.)), from lake miedwie were studied within 1997-1999. the necropsies yielded 41 parasite species (taxa). the most diversified were parasite faunas of pike (19 parasite ... | 2002 | 16888943 |
| diversity of the parasite fauna of cyprinid (cyprinidae) and percid (percidae) fishes in the vistula lagoon, poland. | a total of 2398 fish specimens (1091 percidae and 1307 cyprinidae) belonging to 16 species (3 percidae and 13 cyprinidae), caught in the polish part of the vistula lagoon were examined within december 1994-march 1997. the parasites found were identified as belonging to 63 taxa (61 species as well as diplostomum spp. flukes and glochidia unionidae gen. sp. which could not be identified to species) of the microsporea (1), protozoa (1), myxozoa (2), monogenea (10), digenea (15), cestoda (11), nemat ... | 2003 | 16889022 |
| [application of peracetic acid for the treatment of juvenile sander (sander lucioperca) during ichthyophthirius multifiliis infestation]. | white spot disease caused by the ciliate protozoan parasite ichthyophthirius multifiliis (i. m.), is one of the most dangerous diseases in aquaculture and ornamental fish breeding worldwide. the parasite is characterized by three developmental stages: a reproductive tomont, an infective theront and a parasitic trophont. in sander (sander lucioperca) breeding i. m. causes serious economic losses. after banning of the traditional therapeutic agent malachite green we have to face a state of emergen ... | 2007 | 17724932 |
| levels of pcdd/f and dioxin-like pcb in baltic fish of different age and gender. | concentrations of polychlorinated dibenzo-p-dioxins (pcdd), polychlorinated dibenzofurans (pcdf) and polychlorinated biphenyls (pcb) in baltic sea fish like herring (clupea harengus membras), sprat (sprattus sprattus balticus), perch (perca fluviatilis), pikeperch (sander lucioperca) and flounder (platichthys flesus trachurus) collected from four areas of the estonian coastal waters are reported. all samples are studied for their relationship between the length (cm) and wet weight (g); length (c ... | 2008 | 17931686 |
| evaluation of trace heavy metal levels of some fish species sold at retail in kayseri, turkey. | cd, ni, cr, zn, cu and pb concentrations of muscle tissue of 61 fish samples belonging to six fish species (sparus auratus, pomatomus saltatrix, sarda sarda, engraulis encrasicholus, sander lucioperca, scomber scombrus) retailed in kayseri, turkey were determined by flame atomic absorption spectrometry after wet digestion. cd concentrations of at least 31 fish samples (50.8%) and pb concentrations of at least six fish samples (9.8%) exceeded the corresponding turkish permissible limit of 0.05 an ... | 2009 | 18344008 |
| natural, social, economical and political influences on fisheries: a review of the transitional area of the polish waters of the vistula lagoon. | a 60 year (1948-2007) dataset gathered by polish researchers working on the vistula lagoon fish assemblages and fisheries has shown this stressed transitional environment to be always been dominated by a few highly abundant fish species. during this period, the surrounding countries poland and russia (kaliningrad) were transformed from centrally-planned economies with fixed prices to free market systems. the organization of the fishery evolved from one in which the majority of the fishing effort ... | 2010 | 20359718 |
| non-dioxin-like pcbs in ten different fish species from the danube river in serbia. | this work has been developed to examine the level of non-dioxin-like (ndl) pcbs (28, 52, 101, 138, 153 and 180) in (a) ten different freshwater fish species from the danube river, (b) two sampling points: up and downstream of the industrial zone of the city of pancevo (ecological hot spot in serbia) and (c) two time points i.e., in 2001 and 2006. obtained results would serve to analyse spatial, temporal and congener profile characteristics of ndl pcbs cumulated in fish tissues due to environment ... | 2010 | 21161586 |
| foraging, bioenergetic and predation constraints on diel vertical migration: field observations and modelling of reverse migration by young-of-the-year herring clupea harengus. | diel vertical migration (dvm) of young-of-the-year (yoy) herring clupea harengus and one of their major predators, pikeperch sander lucioperca, was examined using bottom-mounted hydroacoustics in himmerfjärden, a brackish bay of the baltic sea, in summer. in contrast to previous studies on dvm of c. harengus aggregated across size and age classes, yoy c. harengus showed a reverse dvm trajectory, deeper at night and, on average, shallower during the day. this pattern was observed consistently on ... | 2011 | 21284628 |
| investigation of zinc, copper, lead and cadmium accumulation in the tissues of sander lucioperca (l., 1758) living in hirfanl-¦ dam lake, turkey. | this study, some metals (zinc, copper, lead and cadmium) were analyzed in liver, muscle and gills of sander lucioperca (linnaeus, 1758) caught from the hirfanl-¦ dam lake in december 2007. the highest concentrations were found in liver (zinc:32.5-á++g/g, lead:10.73-á++g/g, copper:5.85-á++g/g, cadmium:0.76-á++g/g) of sander lucioperca. it was seen that the accumulation of zinc, lead and cadmium primarily took place in liver followed by muscles and gills. it was observed that copper is mainly accu ... | 2011 | 21706264 |
| viral encephalopathy and retinopathy outbreak in freshwater fish farmed in italy. | viral encephalopathy and retinopathy (ver), otherwise known as viral nervous necrosis (vnn), is a neuropathological condition affecting > 40 species of fish. although ver affects mainly marine fish, the disease has also been detected in certain species reared in freshwater environments. there are relatively few reports concerning the disease in freshwater species, and there is not much information on clinical signs. nevertheless, the most common clinical findings reported from affected freshwate ... | 2011 | 21991664 |
| species richness and diversity of the parasites of two predatory fish species - perch (perca fluviatilis linnaeus, 1758) and zander (sander lucioperca linnaeus, 1758) from the pomeranian bay. | pomeranian bay as an ecotone is a transition zone between two different biocenoses, which is characterized by an increase in biodiversity and species density. therefore, pomeranian bay is a destination of finding and reproductive migrations of fish from the rivers entered the area. the aim of the study was to compare parasitic fauna of two predatory fish species from the pomeranian bay, collected from the same fishing grounds at the same period. a total of 126 fish studied (53 perches and 73 zan ... | 2015 | 26342503 |
| non-native gobies facilitate the transmission of bucephalus polymorphus (trematoda). | introduced species can modify local host-parasite dynamics by amplifying parasite infection which can 'spill-back' to the native fauna, whether they are competent hosts for local parasites, or by acting as parasite sinks with 'dilution' of infection decreasing the parasite burden of native hosts. recently infection by the trematode bucephalus polymorphus has increased in several european rivers, being attributed to the introduction of intermediate host species from the ponto-caspian region. usin ... | 2015 | 26187653 |
| [the parasite fauna of stizostedion lucioperca from the bay waters of the baltic coast of east germany]. | in pike-perches 20 species of parasites were stated: protozoa (1), monogenea (1), cestoda (2), trematoda (8), nematoda (3), acanthocephala (2), hirudinea (1) and crustacea (2). the high extent and intensity of parasitation bunodera luciopercae in pike-perches of the oder bay are striking, a fact which may inhibit their growth and development. parasitological investigation (infestation of pike-perch with brachyphallus crenatus and anisakis spec. larv.) has proved that about 75% of pike-perch migr ... | 1988 | 3245634 |
| hematological characteristics associated with parasitism in pikeperch sander lucioperca (percidae) from anzali wetland. | a total of 120 sander lucioperca (percidae) were captured and investigated for parasites and also haematological parameters were analysed and compared between infected and uninfected fish. the haematological analysis showed reductions in haematocrit, haemoglobin, red blood cell, whereas with blood cell (wbc) and lymphocyte significantly increased (p < 0.05) in infected fish, whereas with blood cell (wbc) and lymphocyte significantly increased (p < 0.05) in infected fish. parasitological inspecti ... | 2016 | 27876943 |
| epidemiology of fishborne trematodiasis in kazakhstan. | fish borne trematodes are an important cause of morbidity in kazakhstan. the number of human cases of opisthorchiidosis (infection with parasites of the family opisthorchiidae) reached a peak of 2521 recorded cases (17 cases per 100,000) in 2002 with a gradual decline to 1225 cases (7.4 cases per 100,000) in 2011. most human cases are found in the north and north east part of kazakhstan in areas drained by the irtysh river and it tributaries. a further focus is found in the north west in the ura ... | 2014 | 24943190 |
| adaptive major histocompatibility complex (mhc) and neutral genetic variation in two native baltic sea fishes (perch perca fluviatilis and zander sander lucioperca) with comparisons to an introduced and disease susceptible population in australia (p. fluviatilis): assessing the risk of disease epidemics. | this study assessed the major histocompatibility complex (mhc) and neutral genetic variation and structure in two percid species, perch perca fluviatilis and zander sander lucioperca, in a unique brackish ecosystem, the baltic sea. in addition, to assess the importance of mhc diversity to disease susceptibility in these populations, comparisons were made to an introduced, disease susceptible, p. fluviatilis population in australia. eighty-three mhc class ii b exon 2 variants were amplified: 71 v ... | 2016 | 26940068 |
| genome sequence of a ranavirus isolated from pike-perch sander lucioperca. | the pike-perch iridovirus (ppiv) was isolated in finland from apparently healthy pike-perch fingerlings during routine disease surveillance. our phylogenomic analysis revealed that ppiv is the first fish member of a clade of ranaviruses previously described from european and chinese amphibians. | 2016 | 27856591 |
| spatial monitoring of heavy metals in the inland waters of serbia: a multispecies approach based on commercial fish. | the study monitored the contamination of fish muscle tissue by elements al, as, cd, co, cr, cu, fe, hg, mn, ni, pb, and zn at 17 sampling sites, in order to assess the pollution status of the main rivers in serbia. of the six commercially important fish species included in the study (pikeperch sander lucioperca, catfish silurus glanis, bream abramis brama, barbel barbus barbus, chub squalius cephalus, nase chondrostoma nasus), the bioconcentration factor (bcf) indicated that benthivore bream and ... | 2016 | 26857004 |
| factors affecting antioxidant response in fish from a long-term mercury-contaminated reservoir. | the objective of this work was to evaluate antioxidant defence and oxidative damage in organs (liver, gills, kidney, and brain) of five fish species (aspius aspius, esox lucius, sander lucioperca, abramis brama, rutilus rutilus) from the long-term mercury-contaminated skalka reservoir in the czech republic. special emphasis was placed on a comprehensive assessment of the factors that may affect the antioxidant response to mercury in fish. antioxidant enzymes (glutathione reductase, glutathione p ... | 2015 | 26276034 |
| persistent organic pollutants in muscle of fish collected from the nové mlýny reservoir in southern moravia, czech republic. | the aim of the present study was to investigate the content of organochlorine pesticides (ocps) and polychlorinated biphenyls (pcbs) in muscle tissues of fish, i.e. carp (cyprinus carpio, l.), bream (abramis brama, l.) and pike perch (stizostedion lucioperca, l.) from the middle nové mlýny reservoir and compare our results with previous corresponding studies. samples were analysed by gas chromatography with ion trap tandem mass spectrometry. the highest contents of all pollutants were determined ... | 2015 | 26092236 |
| concentrations of microcystins in tissues of several fish species from freshwater reservoirs and ponds. | the aim of this study is to summarise the determination of concentrations of microcystins (mcs) in muscle and liver of freshwater fish species caught in stagnant waters of the czech republic. within the years 2007-2009, 351 muscle samples and 291 liver samples of 16 freshwater fish species derived from four fishponds, and four water reservoirs were analysed. mcs were detected in 53 liver samples. the highest concentrations of microcystins were determined in liver samples of carnivorous fish spec ... | 2013 | 23756815 |
| reservoir to river passage of age-0+ year fishes, indication of a dispersion pathway for a non-native species. | this study demonstrates passage of age-0+ year individuals of pikeperch sander lucioperca, common bream abramis brama and non-native tubenose goby proterorhinus semilunaris from the nové mlýny reservoir into the river dyje (danube river basin, czech republic) through the turbine of a hydropower facility. most fishes had standard length (ls ) in the range 12-33 mm. seasonal patterns corresponded with spawning activity, i.e. an early single spawning event for s. lucioperca, multiple spawning event ... | 2013 | 23464556 |
| within-lake distribution patterns of fish assemblages: the relative roles of spatial, temporal and random environmental factors in assessing fish assemblages using gillnets in a large and shallow temperate lake. | in this study, the relative role of spatio-temporal factors and associated environmental variables (water transparency and temperature) were quantified in relation to gillnet samples of fishes in a large and shallow lake (lake balaton, hungary). most of the variance (56·1%) in the relative abundance data (%) was related to the vertical segregation of fishes. this gradient substantially affected the catch per unit effort (cpue) by number of the dominant species, the surface-oriented bleak alburnu ... | 2013 | 23464547 |
| the accumulation and distribution of metals in water, sediment, aquatic macrophytes and fishes of the gruža reservoir, serbia. | the concentrations of iron, lead, cadmium, copper, manganese, mercury and arsenic were measured in water, sediment, five macrophytes (typha angustifolia, iris pseudacorus, polygonum amphybium, myriophyllum spicatum and lemna gibba) and five fish species (sander lucioperca, abramis brama, carassius gibelio, silurus glanis and arystichtys nobilis) in the gruža reservoir, used for water supply and recreational fishing. the concentrations of all examined elements were higher in sediment than in wate ... | 2013 | 23412697 |
| assessment of copper and zinc levels in fish from freshwater ecosystems of moldova. | the aim of this work was to assess the levels of copper and zinc in fish from the main freshwater ecosystems of moldova, in relation with species, habitat, age, sex, season, and development stage. | 2012 | 22234853 |
| temperature dependent characteristics of intestinal glycyl-l-leucine dipeptidase in boreal zone fish. | three kinds of boreal zone fish were investigated for gastrointestinal glycyl-l-leucine (gl) dipeptide cleaving activity as a function of feeding stage and seasonal changes. the enzyme activity tested in the perch (perca fluviatilis l.) intestine increased steadily during digestion and rapidly disappeared after completion. the temperature characteristics and the seasonal changes in dipeptide cleaving activity in pike perch (stizostedion lucioperca l.) and bream (abramis brama l.) were studied. i ... | 2003 | 14529758 |
| comparative study of acetylcholinesterase and butyrylcholinesterase in brain and serum of several freshwater fish: specific activities and in vitro inhibition by ddvp, an organophosphorus pesticide. | a comparative study of specific activities and in vitro inhibition of brain and serum acetylcholinesterase (ache; ec 3.1.1.7) and serum butyrylcholinesterase (bche; ec 3.1.1.8) by ddvp, an organophosphorus pesticide, was conducted in 11 freshwater teleost species belonging to four families (cyprinidae; common carp cyprinus carpio, bream abramis brama, blue bream a. ballerus, white bream blicca bjoerkna, roach rutilus rutilus, bleak alburnus alburnus, ide leuciscus idus; percidae: perch perca flu ... | 2000 | 11246494 |
| mercury bioaccumulation along food webs in temperate aquatic ecosystems colonized by aquatic macrophytes in south western france. | mercury (hg) is considered as an important pollutant for aquatic systems as its organic form, methylmercury (mehg), is easily bioaccumulated and bioamplified along food webs. in various ecosystems, aquatic periphyton associated with macrophyte was identified as an important place for hg storage and methylation by microorganisms. our study concerns temperate aquatic ecosystems (south western france) colonized by invasive macrophytes and characterized by high mercury methylation potentials. this w ... | 2013 | 23466146 |
| biomonitoring of polychlorinated biphenyls (pcbs) in heavily polluted aquatic environment in different fish species. | the distribution and concentrations of polychlorinated biphenyls (pcbs) were determined in fish species (european perch perca fluviatilis, northern pike esox lucius, pike perch sander lucioperca, wels catfish silirus glanus, common carp cyprinus carpio, european eel anguilla anguilla, freshwater bream abramis brama, goldfish carassius auratus, and roach rutilus rutilus) in a heavily polluted water reservoir zemplínska šírava (slovakia). the study performed at two different time points 5 years ap ... | 2012 | 22173787 |
| mercury and selenium concentrations in muscle tissue of different species of predatory freshwater fish and correlation between these elements. | concentrations of total mercury and selenium were determined in 49 and 42 muscle tissue samples, respectively, of six species of predatory freshwater fish, dace (leuciscus leuciscus), pike perch (sander lucioperca), pike (esox lucius), european catfish (silurus glanis), rainbow trout (oncorhynchus mykiss) and asp (aspius aspius). muscle selenium concentration did not correlate with the corresponding total mercury concentration (r² < 0.198) in all examined predatory fish species. there was an inv ... | 2012 | 24779785 |
| feeding habits and ontogenic changes in digestive enzyme patterns in five freshwater teleosts. | feeding habits and the activity of digestive enzymes (total alkaline proteases, α-amylase and lipase) from dace leuciscus leuciscus, roach rutilus rutilus, prussian carp carassius auratus gibelio, perch perca fluviatilis and pikeperch sander lucioperca fry were studied in the malye chany lake-kargat estuary (western siberia, russia). the diet of fry from all studied species was mainly composed of chironomid larvae and zooplanktonic organisms (i.e. cladocera and copepoda), whereas carnivorous spe ... | 2014 | 25199648 |
| po-210 and pb-210 in water and fish from taboshar uranium mining pit lake, tajikistan. | polonium-210 in water and (210)pb and (210)po in different fish organs from 3 different fish species in taboshar pit lake (n = 13), located in the uranium mining area in tajikistan, and in kairakkum reservoir (reference lake, n = 3), have been determined as part of a joint project between norway, kazakhstan, kyrgyzstan and tajikistan. the average activity concentration of (210)pb and (210)po in liver, muscle and bone of carassius auratus was higher than the concentration in similar tissues of c. ... | 2013 | 22513216 |
| recruitment of pelagic fish in an unstable climate: studies in sweden's four largest lakes. | pelagic fish population biology was studied in the large swedish lakes vänern, vättern, mälaren and hjälmaren. it is crucial for fish fry in temperate regions to hatch early in the growth season to survive, and achieve large size before winter, and it is suggested that the key factors are to match the spring development of phyto- and zooplankton, but to avoid predation. this is more easily accomplished by the studied spring spawners smelt (osmerus eperlanus) and pike-perch (stizostedion lucioper ... | 2001 | 11878031 |
| weighted species richness outperforms species richness as predictor of biotic resistance. | the species richness hypothesis, which predicts that species-rich communities should be better at resisting invasions than species-poor communities, has been empirically tested many times and is often poorly supported. in this study, we contrast the species richness hypothesis with four alternative hypotheses with the aim of finding better descriptors of invasion resistance. these alternative hypotheses state that resistance to invasions is determined by abiotic conditions, community saturation ... | 2016 | 27008794 |
| 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 ... | 2013 | 24054751 |
| distribution and accumulation of elements (as, cu, fe, hg, mn, and zn) in tissues of fish species from different trophic levels in the danube river at the confluence with the sava river (serbia). | pikeperch (sander lucioperca), european catfish (silurus glanis), common carp (cyprinus carpio), and gobies (neogobius gymnotrachelus, neogobius melanostomus) were collected from the danube river (belgrade section), and samples of liver, muscle, or whole-body composites (in the case of gobies) were analyzed for as, cu, fe, hg, mn, and zn with inductively coupled plasma optical spectrometry to find out if there was a correlation between accumulation of these elements in predatory and prey species ... | 2013 | 23389858 |
| effect of season on fatty acid composition and n-3/n-6 ratios of zander and carp muscle lipids in altinapa dam lake. | in this study, seasonal variations on total fatty acid composition of carp, cyprinus carpio, and zander, sander lucioperca, muscle lipids in altinapa dam lake were determined. fish samples in 2 seasons (summer and winter) were obtained from altinapa dam lake in konya, turkey. polyunsaturated fatty acids were found to be higher during the cold season than in the hot both in zander and carp. whereas the docosahexaenoic acid was high in zander both in summer and winter, in carp it was high only dur ... | 2011 | 22417340 |
| comparative study of mercury accumulation in two fish species, (cyprinus carpio and sander lucioperca) from anzali and gomishan wetlands in the southern coast of the caspian sea. | anzali and gomishan wetlands are considered as two of the most important wetlands in southern coast of caspian sea. to investigate mercury accumulation in these ecosystems, total mercury concentrations were measured in the muscle tissue of two fish species. higher mercury concentrations were detected in c. carpio, an omnivorous benthic/pelagic species (anzali wetland: 0.2 μg g(-1) wet weight; gomishan wetland: 0.2 μg g(-1) wet weight), than in s. lucioperca, a carnivorous pelagic species (anzali ... | 2011 | 21956764 |
| various aspects of piscine toxicology. | in opposition to toxicology of mammals piscine toxicology is closely connected with the conditions of external environment. the aquatic environment is necessary for embryonic development and after hatching during short or long-lasting larval period of most fish species. an aquatic environment is polluted by many industrial and agricultural wastes. ammonia as a toxic and common compound in water have negative influence for aquaculture especially in intensive fish culture, recirculation system and ... | 2010 | 21217882 |
| [the rodlet cells of some species of freshwater and marine bony fishes of orders cypriniformes and perciformes]. | the fine structure of rodlet cells from pronephros of cobitis taenia (l.), mesonephros of tinca tinca (l.), rutilus rutilus (l.), stizostedion volgense (gmelin), stizostedion lucioperca (l.), perca fluviatilis (l.), trachurus mediterraneus (staindachner) and diplodus annularis (l.) was studied. in the organs examined, cells at developmental stages iii, iv and v were detected. it is shown, that the rodlet cells have the structural organization similar to that described in different organs of fish ... | 2011 | 21539089 |
| high prevalence of trypanosome co-infections in freshwater fishes. | one thousand three hundred seventy three fish specimens of eight different species from the vicinity of kyiv, ukraine, were examined for the presence of trypanosomes and 921 individuals were found to be infected. the prevalence of infection ranged from 24% in freshwater bream, abramis brama (linnaeus), to 100% in spined loach, cobitis 'taenia' linnaeus. the level of parasitaemia also varied significantly between generally mild infections in pikeperch, sander lucioperca (linnaeus), and heavy ones ... | 2014 | 25651690 |
| total mercury in sediments, macrophytes, and fish from a shallow steppe lake in eastern austria. | during summer 2011, samples of sediment, macrophytes, and fish tissues from the shallow, slightly alkaline lake neusiedl, austria, were evaluated for their total hg content. this is the first report of hg levels from this lake. sediments displayed hg contents between 0.025 and 0.113 μg g(-1) dw (dry weight), significantly correlating with the proportion of organic components pointing to a small anthropogenic impact on the lake's hg content. hg levels in plants and fish were unexpectedly high: bo ... | 2014 | 25146770 |
| gill reaction to pollutants from the tamiš river in three freshwater fish species, esox lucius l. 1758, sander lucioperca (l. 1758) and silurus glanis l. 1758: a comparative study. | the study evaluated the effects of waterborne pollutants from the tamiš river on gill histology and possible differences in gill reaction patterns between three freshwater fish species, pike esox lucius l. 1758, pike-perch sander lucioperca (l. 1758) and wels catfish silurus glanis l. 1758 from the tamiš river. gills from analysed fish species showed moderate to intense histopathological alterations. the most frequent progressive alteration was hyperplasia of epithelium, whereas the most frequen ... | 2015 | 24809962 |
| trophic ecology of the pikeperch (sander lucioperca) in its introduced areas: a stable isotope approach in southwestern france. | during the last decades, non-native predatory fish species have been largely introduced in european lakes and rivers, calling for detailed information on the trophic ecology of co-existing native and non-native predators. the present study describes the trophic ecology of the introduced pikeperch (sander lucioperca) in two southwestern french rivers, using stable isotope analysis. pikeperch could be categorized as a top-predator, and had a significantly higher trophic position (tp, mean+/-se=4.2 ... | 2009 | 19632657 |
| testing the potential for predictive modeling and mapping and extending its use as a tool for evaluating management scenarios and economic valuation in the baltic sea (prehab). | we evaluated performance of species distribution models for predictive mapping, and how models can be used to integrate human pressures into ecological and economic assessments. a selection of 77 biological variables (species, groups of species, and measures of biodiversity) across the baltic sea were modeled. differences among methods, areas, predictor, and response variables were evaluated. several methods successfully predicted abundance and occurrence of vegetation, invertebrates, fish, and ... | 2014 | 24414807 |
| 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 ... | 2017 | 27650692 |
| grellamoeba robusta gen. n., sp. n., a possible member of the family acramoebidae smirnov, nassonova et cavalier-smith, 2008. | a strain of naked amoeba isolated from pikeperch (sander lucioperca (l.)) kidney tissue has been characterized using light- and transmission electron microscopy. sequencing of ssu rdna and phylogenetic analysis based on a broad dataset of sequences completed our study. all data obtained suggest that this strain belongs to a species that has not been described before. as none of the existing genera of amoebae is applicable to this organism, the new genus grellamoeba is established and the type sp ... | 2010 | 20347581 |
| [new species of coccidia eimeria stizostedioni sp. n. (sporozoa: coccidea) from the pike perch stizostedion lucioperca (perciformes)]. | a new coccidia species eimeria stizostedioni from the pikeperch stizostedion lucioperca (perciformes) is described. localities: neva river. prevalence: 20% (1/5). intensity of infection weak. oocysts 7.5-8.0 x 10.0-12.5 microns. the form varies from oval up to ovoid; a wall is sleek, colourless, single-layer two-planimetric, micropyle, the polar granules and residual body are absent. sporocysts 3.5 x 6.5 microns, with stieda body and residual body represented by few small granules. sporogony is ... | 2007 | 12815820 |
| lucionema balatonense gen. et sp. n., a new nematode of a new family lucionematidae fam. n. (dracunculoidea) from the swimbladder of the european pikeperch, stizostedion lucioperca (pisces). | a new nematode genus and species, lucionema balatonense gen. et sp. n., is described from the swimbladder of the european pikeperch, stizostedion lucioperca (l.), from lake balaton in hungary; a new dracunculoid family lucionematidae fam. n. is established to accommodate it. the hitherto monotypic family lucionematidae shows affinities with the families skrjabillanidae and daniconematidae, differing from them mainly in having simple oesophagus without external oesophageal glands and the vulva si ... | 1998 | 9516996 |