| histopathology in leuciscus cephalus (pisces: cyprinidae) resulting from infection with pomphorhynchus laevis (acanthocephala). | the histopathology present in leuciscus cephalus risso 1826 from the river po, naturally infected with the acanthocephalan pomphorhynchus laevis müller 1776, was studied and described. the parasite was only found within the host's digestive tract, and a density of 10 p. laevis per square centimeter was common. on histological examination it was noticed that both male and female parasites penetrated deeply through all the layers of the host digestive tract by means of their slender neck, bulb and ... | 1991 | 1844504 |
| potential interactions between acanthocephalus anguillae and pomphorhynchus laevis in their natural hosts chub, leuciscus cephalus and the european eel, anguilla anguilla. | chub and eels were experimentally infected via intermediate hosts harbouring cystacanths, with pomphorhynchus laevis alone, or acanthocephalus anguillae alone, or simultaneously with mixtures of both species in varying proportions, and sampled at 7, 56 or 112 days post-infection. examination of chub revealed that both species showed low establishment and growth rates, differing markedly from british field data, where chub is apparently one of the most important hosts, and preventing further mean ... | 1991 | 1852495 |
| two new species of the genus gyrodactylus (monogenea) from the fins of leuciscus cephalus (l.). | gyrodactylus kearni sp. n. and g. lamberti sp. n. (monogenea: gyrodactylidae) are described from the fins of the freshwater fish, leuciscus cephalus (l.) (cyprinidae), from the rokytná river and stĕpánovický brook (basin of the river danube), czechoslovakia, g. kearni sp. n. is most related to g. leucisci zitnan, 1964 in the shape and size of marginal hooks, but can be separated from it in the shape of anchors and ventral bar. g. lamberti sp. n. is most closely related to g. gobii shulman, 1953 ... | 1990 | 2093614 |
| treatment of fish parasites. 2. effects of praziquantel, niclosamide, levamisole-hcl, and metrifonate on monogenea (gyrodactylus aculeati, diplozoon paradoxum). | in research for successful treatment of fish parasitized by monogeneans, four substances (praziquantel, niclosamide, levamisole-hcl, and metrifonate) were tested in vivo against gyrodactylus aculeati parasitizing the skin of sticklebacks (gasterosteus aculeatus). fish were incubated in water containing different solutions of the drugs. praziquantel, niclosamide and levamisole-hcl were effective against gyrodactylus aculeati. praziquantel caused irreversible lesions in the parasite tegument (begi ... | 1987 | 3615395 |
| the distribution and host range of species of the blood fluke sanguinicola in british freshwater fish. | the distribution of host range of sanguinicola armata, s. inermis and s. volgensis in british freshwater fish are described. s. inermis has been recorded in carp cyprinus carpio, crucian carp carassius carassius and tench tinca tinca in southern, central and eastern england and in koi carp imported from japan. s. armata has been detected in pike esox lucius and tench and s. volgensis has been found in chub leuciscus cephalus, dace leuciscus leuciscus, perch perca fluviatilis, roach rutilus rutil ... | 1994 | 7706678 |
| development of proteocephalus torulosus in the intermediate host under experimental conditions. | the development of the tapeworm proteocephalus torulosus (batsch, 1786) (cestoda: proteocephalidae), a parasite of cyprinid fish, was studied in the intermediate host under experimental conditions. the eggs of p. torulosus were typified by a relatively small outer envelope (hyaline membrane) and a thick middle layer surrounding the oncosphere. incubation of p. torulosus eggs at different temperatures revealed the ability of some oncospheres to survive and remain infective to the intermediate hos ... | 1993 | 8132977 |
| lead accumulation in pomphorhynchus laevis and its host. | adults of pomphorhynchus laevis were collected from the intestines of 10 chubs (leuciscus cephalus) from the river ruhr near bochum, germany. the acanthocephalans and various tissues of the fish (muscle, liver, and intestine) were analyzed for lead with electrothermal atomic absorption spectrometry. the mean lead level in the parasite was 54 micrograms/g wet weight, which was 284 times more than in the host intestine, 771 times more than in host liver, and 2,700 times more than in host muscle. t ... | 1994 | 8195935 |
| colonization and establishment of pomphorhynchus laevis (acanthocephala) in an isolated english river. | the successful colonization, establishment and spread of pomphorhynchus laevis in a small, isolated, devon river 128 km from the parasite's nearest focus in dorset was followed over 11 years from 1985. the parasite was first detected in anguilla anguilla and platichthys flesus in 1988: by 1995 it had attained prevalence levels of 22.6% in a. anguilla and 43.6% in p. flesus and also occurred in 100% salmo trutta, 50% cottus gobio and noemacheilus barbatulus. as judged by prevalence, abundance, pr ... | 1996 | 8991914 |
| long-term recovery of macrobenthos and fish assemblages after water pollution abatement measures in the river petite baïse (france). | riverine ecosystems are subject to a large variety of man-made influences, and in recent years a new public awareness of the need to protect rivers has emerged within the industrialized world. the present study focuses on the effect of abatement of pollution from one factory on the recovery of fish and macroinvertebrate species richness in the river petite baïse over a 20-year period (1973-1993). until 1973, the petite baïse (75 km in length) received not only factory waste (nitrogenous rich eff ... | 1997 | 9353205 |
| vexillifera expectata sp. n. and other non-encysting amoebae isolated from organs of freshwater fish. | four strains of non-encysting amoebae were isolated from organs of freshwater fishes and characterized using light and electron microscope. morphology of three clonal strains was consistent with amoebae which had already been described from water habitats. two strains, one isolated from kidney tissue of common goldfish, carassius auratus (linnaeus, 1758), and the second one from brain of chub, leuciscus cephalus linnaeus, 1758, were identified with vannella platypodia (gläser, 1912) page, 1976. ... | 1998 | 9516992 |
| the cement apparatus of larval and adult pomphorhynchus laevis (acanthocephala: palaeacanthocephala). | light and electron microscopy were used to study the ultrastructure of the cement apparatus, namely cement glands and cement ducts of mature specimens of the acanthocephalan parasite pomphorhynchus laevis müller, 1776, recovered from the digestive tracts of fish leuciscus cephalus risso, 1826. in addition, the cement glands of immature p. laevis found within the body cavity of the fish alburnus alburnus alborella de filippi, 1844 were examined. in a mature male of p. laevis the 6 cement glands a ... | 1998 | 9614327 |
| uptake of lead by pomphorhynchus laevis cystacanths in gammarus pulex and immature worms in chub (leuciscus cephalus). | the uptake of lead by cystacanths of the acanthocephalan pomphorhynchus laevis in naturally infected amphipods, gammarus pulex, and by immature parasites in experimentally infected fish, leuciscus cephalus, was examined following 3-week experimental exposures (0.01 and 0.1 mg l(-1) pb2+). both g. pulex and the cystacanths of p. laevis accumulated lead but concentrations in the parasites were lower than in the host tissues at the low lead dose and significantly lower at the high dose. p. laevis f ... | 1998 | 9694375 |
| impact assessment of a wastewater treatment plant effluent using the fish biomarker ethoxyresorufin-o-deethylase: field and on-site experiments. | the impact of a wastewater treatment plant (wwtp) effluent was assessed with the fish biomarker ethoxyresorufin-o-deethylase (erod) using field and on-site laboratory experiments. erod activity was measured in chub (leuciscus cephalus) and stone loach (noemacheilus barbatulus) caught at three sites of the chalaronne river (southeast france). liver somatic index (lsi) and organochloride bioaccumulation in muscle were estimated for chub only. in september, erod activity and lsi of chub increased s ... | 1998 | 9756685 |
| biodiversity of parasites in a freshwater environment with respect to pollution: metazoan parasites of chub (leuciscus cephalus l.) as a model for statistical evaluation. | this paper represents an attempt to evaluate the environmental indicative potential of the biodiversity of monogenean parasites using hierarchically structured species-abundance data. a logical set of statistical methods integrating standard diversity indices, a novel approach to quantitative analysis of cumulative species-abundance curves and species-abundance models was applied for this purpose. applicability of biodiversity measures was demonstrated using experimental data from a 1-year study ... | 1998 | 9801915 |
| biodiversity of parasites in freshwater environment in relation to pollution. | during 1994, 129 specimens of chub (leuciscus cephalus l.) from two localities, polluted--bolelouc, 80th river kilometer, near the city of olomouc, and unpolluted--brodské, 225th river kilometer, near the lanzhot on the morava river, were examined for metazoan parasites. altogether 38 metazoan parasite species including helminths, leeches and glochidia belonging to 14 genera were found, 34 in the case of unpolluted locality (brodské) and 28 in the polluted one (bolelouc). in both localities, 24 ... | 1997 | 9802067 |
| heavy metals concentrations in acanthocephalans parasites compared to their fish host. | a number of authors have demonstrated that heavy metal concentrations in intestinal helminths are higher than those found in the tissues of their final hosts. in this work, pb and cr concentrations in the acanthocephalan acanthocephalus anguillae were measured by means of electrothermal atomic absorption spectrometry. the metal concentrations measured in the whole body of acanthocephalans were compared to those in the liver of their fish hosts (leuciscus cephalus) sampled in the lambro river (no ... | 1998 | 9839409 |
| populations of acanthocephalus anguillaepomphorhynchus laevis in rivers with different pollution levels | the distribution of two acanthocephalan species (pomphorhynchus laevisacanthocephalus anguillae) in the chub (leuciscus cephalus) was studied in four river reaches characterized by different levels of pollution: the river ticino near abbiategrasso (unpolluted), the naviglio grande canal, in milano (slightly polluted), the river lambro near merone village (polluted) and the river lambro near monza (severely polluted).pomphorhynchus laevis was restricted to the unpolluted and the slightly polluted ... | 1998 | 9858630 |
| pomphorhynchus laevis: the intestinal acanthocephalan as a lead sink for its fish host, chub (leuciscus cephalus). | aqueous lead exposure of chub (leuciscus cephalus) experimentally infected with the parasite pomphorhynchus laevis resulted in a rapid accumulation of this metal in the intestinal acanthocephalans, reaching concentrations which were significantly greater than in the host muscle, liver, and intestine and approximately 1000 times higher than the exposure con centration. parasitized chub accumulated significantly less lead in their intestinal wall than their uninfected conspecifics (mann-whitney u ... | 1999 | 10502468 |
| concentrations of pcbs, ddts, and tcdd equivalents in cyprinids of the middle po river, italy. | the concentrations of non-ortho-, mono-ortho-, di-ortho-substituted polychlorinated biphenyls (pcbs) and ddts (pp'-ddt and pp'-dde) were measured in fish and bed sediments of the po river. three species of cyprinids, nase (chondrostoma söetta), chub (leuciscus cephalus), and barbel (barbus plebejus), were captured in the major italian river, upstream and downstream from the confluence of the lambro river. the two carnivorous species, chub and barbel, were found to be the most contaminated, showi ... | 2000 | 10629284 |
| fatty acid composition of four microsporidian species compared to that of their host fishes. | the fatty acid composition of four microsporidian species (glugea atherinae, spraguea lophii, glugea americanus, and pleistophora mirandellae) and their host fishes has been determined using gas chromatography. twenty-four fatty acids were identified with differences in relative abundance of fatty acids among the four parasites. certain even-saturated fatty acids were found in a very high proportion: palmitic acid (16:0) represented one-third of total fatty acids in pleistophora mirandellae. the ... | 2000 | 10651288 |
| myxosporidia and macrophage centres in chub (leuciscus cephalus)--quantitative interactions focus on myxobolus cyprini. | six myxosporidian species were found in chub (leuciscus cephalus) originating from lower austrian rivers. the frequency of the parasites and their localization was recorded. in all chub, independent of size and origin, myxobolus cyprini occurred predominantly in the macrophage centres (mcs) of the haematopoietic organs, spleen and kidney. exclusively in the head kidney of young fish not yet described vermicular plasmodia containing spores of m. cyprini were found. in muscle tissue the prevalence ... | 2001 | 11197764 |
| comparison between lead accumulation of pomphorhynchus laevis (palaeacanthocephala) in the intestine of chub (leuciscus cephalus) and in the body cavity of goldfish (carassius auratus auratus). | this experimental study assessed the role of the microhabitat in the uptake of metals by adult acanthocephalans. we examined the accumulation of lead by adult pomphorhynchus laevis in the intestine of chub (leuciscus cephalus) and compared it with that in goldfish, carassius auratus auratus, in which the parasites penetrate the intestinal wall and enter the body cavity. chub and goldfish experimentally infected with adult pomphorhynchus laevis were exposed to 0.01 mg l(-1) pb(2+) over 3 weeks. l ... | 2001 | 11336747 |
| the cement apparatus of larval and adult acanthocephalus anguillae (acanthocephala), with notes on the copulatory cap and origin of gland secretion. | light and electron microscopy were used to investigate the ultrastructure of the cement apparatus, namely cement glands and cement ducts, of mature specimens of the parasite acanthocephalus anguillae (muller, 1780) luhe, 1911 recovered from the alimentary canal of fish leuciscus cephalus (risso, 1826). in addition, the cement apparatus of immature a. anguillae found within the body cavity of the crustacean asellus aquaticus (l.) was examined. in immature and mature males of acanthocephalus angui ... | 2001 | 11355679 |
| mutagenicity of sediments along the po river and genotoxicity biomarkers in fish from polluted areas. | we monitored the mutagenicity of extracts of sediment fine particles collected, both in the cold season and in the hot season, from 10 reaches along the po river, the main italian watercourse. each sample was representative of several kilometers of river stretch. at sub-toxic doses, the samples were not mutagenic to the salmonella typhimurium his(-) strains ta98, ta100 and ta102, irrespective of the presence of s9 mix. however, they induced a mutagenic response in yg1024, which is typically reve ... | 2002 | 11909760 |
| use of blood parameters in fish to assess acidic stress and chloride pollution in french running waters. | the study investigated whether plasmatic parameters in fish such as cl- content could serve as physiological indicators to evaluate water quality. the variations of plasma cl- content in two fish species caught in a wide range of rivers representative of the hydrographic system of lorraine (n-e france) were investigated. first, we studied autochthonous populations of chub (leuciscus cephalus) which is a widespread species in the rivers of lorraine. organisms living in highly mineralised rivers ( ... | 2002 | 11996122 |
| pomphorhynchus laevis (palaeacanthocephala) in the intestine of chub (leuciscus cephalus) as an indicator of metal pollution. | chub experimentally infected with the acanthocephalan parasite pomphorhynchus laevis were exposed to 0.01 mg l(-1) pb(2+) over 5 weeks. lead was rapidly accumulated in the intestinal worms reaching a steady-state concentration after 4 weeks. this concentration was significantly greater than in the host muscle, liver and intestine and more than 9,000 times higher than the exposure concentration. lead accumulation in p. laevis increased at a higher exposure concentration but was not correlated wit ... | 2003 | 12547347 |
| occurrence of monogenea in italian freshwater fish (po river basin). | sixteen monogenean species were found on the skin and gills of 10 different fish species collected from north italian water bodies. cleidodiscus pricei from ictalurus melas; dactylogyrus alatus from alburnus alburnus; d. anchoratus, d. formosus and d. vastator from carassius carassius; d. difformis from scardinius erythrophthalmus; d. rutili from rutilus aula; d. tincae and gyrodactylus gasterostei from tinca tinca; d. ergensi from leuciscus cephalus and telestes muticellus; d. vistulae and para ... | 2002 | 12701382 |
| evolutionary and biogeographical patterns within iberian populations of the genus squalius inferred from molecular data. | origins and biogeography of the chub, genus squalius (formerly within the genus leuciscus), in the iberian peninsula were inferred from comparison between patterns of geographic distribution and phylogenetic relationships among populations belonging to 14 european squalius species. the phylogeny recovered was based on the complete sequence of the mitochondrial cytochrome b gene. squalius species were grouped into three major clades. the basal clade included species distributed across the ancient ... | 2003 | 12967604 |
| [on a bacterial disease of the chub (leuciscus cephalus var. cabeda (risso) 1826)]. | | 1963 | 14093798 |
| activity levels and predator detection by amphipods infected with an acanthocephalan parasite, pomphorhynchus laevis. | the acanthocephalan parasite pomphorhynchus laevis (müller, 1776) uses freshwater amphipods as its intermediate host. in order to complete the life cycle, the infected amphipod must be consumed by a fish, where the acanthocephalan will mature and reproduce. parasite transmission, and therefore fitness, could be enhanced if infected amphipods fail to detect or avoid predatory fish. we compared the activity levels of infected and non-infected amphipods, echinogammarus stammeri (karaman, 1931), in ... | 2003 | 14560974 |
| its rdna sequences of pomphorhynchus laevis (zoega in müller, 1776) and p. lucyi williams and rogers, 1984 (acanthocephala: palaeacanthocephala). | the internal transcribed spacers (its-1 and its-2) of the ribosomal rna gene of pomphorhynchus laevis (zoega in müller, 1776) (acanthocephala) isolated from various fish species across central and southern europe were compared with those of p. lucyi williams and rogers, 1984 collected from the largemouth bass micropterus salmonoides boulenger from the usa. the nucleotide sequences of its regions of p. laevis from minnows phoxinus phoxinus (l.) and chub leuciscus cephalus (l.) from two distant lo ... | 2003 | 14574091 |
| the intestinal parasite pomphorhynchus laevis (acanthocephala) interferes with the uptake and accumulation of lead (210pb) in its fish host chub (leuciscus cephalus). | uninfected chub as well as fish experimentally infected with the acanthocephalan parasite pomphorhynchus laevis were exposed to (210)pb(2+) for up to 38 days and the uptake and distribution of lead within different fish organs and the parasites was determined at various time points. highest metal concentrations were detected in the acanthocephalans, followed by intestine, bile, liver, gill and muscle of the fish host. infected chub had significantly lower (210)pb levels in the gills on day 17 (p ... | 2003 | 14636677 |
| myxobolus buckei sp. n. (myxozoa), a new pathogenic parasite from the spinal column of three cyprinid fishes from the united kingdom. | myxobolus buckei sp. n. is described from the spinal column of leuciscus cephalus (l.), rutilus rutilus (l.) and abramis brama (l.) from freshwater rivers in the north of england. the plasmodia develop within the remnants of the embryonic notochord in the intervertebral spaces. the spores are large, measuring (in microm) 14.0 +/- 0.7 x 11.5 +/- 0.6 (mean +/- sd), smooth, round to ellipsoid in valvular view with several sutural edge markings. the polar capsules are pyriform and of equal size, mea ... | 2003 | 14971593 |
| helminths in leuciscus cephalus from the river adda, lombardy, northern italy. | chubs (leuciscus cephalus) were caught at various locations along the river adda and from lake of como (lombardy, northern italy) and endoparasitic helminths were studied in order to integrate the knowledge on distribution of helminth fauna of chubs in lombardy and to investigate on the structure of its parasite infracommunities with respect to different habitat typologies. the following species of parasites were isolated: pomphorynchus laevis, allocreadium markewitschi, parasymphylodora markewi ... | 2003 | 15267000 |
| comparison of morphological characters in irish and english populations of the acanthocephalan pomphorhynchus laevis (müller, 1776). | pomphorhynchus laevis is believed on ecological evidence to exist as three strains in the british isles. however, the strains have never been shown to be capable of being distinguished using morphological characters. a morphological comparison was made between a sample of p. laevis from salmo trutta in l. feeagh in the west of ireland and a sample from leuciscus cephalus in r. culm in the south of england. the length and width of the trunk, neck, bulb, proboscis and hooks were measured. the numb ... | 2004 | 15477755 |
| response of the gut neuroendocrine system of leuciscus cephalus (l.) to the presence of pomphorhynchus laevis müller, 1776 (acanthocephala). | immunohistochemical tests were applied to sections of intestine of uninfected and pomphorhynchus laevis muller-infected chub, leuciscus cephalus (l.) using 15 different antisera. nerve cell bodies and fibres immunoreactive (ir) to the anti-bombesin, -cholecystokinin-8 (cck-8), -galanin, -gastrin-releasing peptide (-grp), -nitric oxide synthase (-nos), -substance p (-sp), and -vasoactive intestinal peptide (-vip) sera were observed in the myenteric plexus of uninfected chub. the density of nerve ... | 2005 | 15736056 |
| concentration of selected metals in muscle of various fish species. | the purpose of this study was to assess concentration of selected metals (fe, mn, zn, cu, ni, co, cr, pb, cd, and hg) in the muscle of four common slovak fish species (chub--leuciscus cephalus, barbel--barbus barbus, roach--rutilus rutilus, and perch--perca fluviatilis). furthermore, correlations among the selected metals and order of metal accumulation in the fish muscle were determined. an electrofishing technique was used for collecting the fish from the nitra river (slovakia) in september 20 ... | 2005 | 15792307 |
| ligula intestinalis infection as a potential source of bias in the bioindication of endocrine disruption in the european chub leuciscus cephalus. | european chub leuciscus cephalus collected from five localities in the lowland and subalpine regions of austria were analysed for oestrogenic effects of endocrine-disrupting chemicals and the presence of the plerocercoid of the tapeworm ligula intestinalis. of 1494 chub analysed, only seven (six males, one female) were found to be infected with single, but large plerocercoids up to 15 cm in length. ligula-infected fish showed comparatively immature gonads, as demonstrated by the gonadosomatic in ... | 2005 | 15831119 |
| bioaccumulation of mercury in muscle tissue of fish in the elbe river (czech republic): multispecies monitoring study 1991-1996. | the study monitored mercury (hg) contamination of fish muscle tissue at 13 geographical sites that can be regarded as crucial points for an ecotoxicological assessment of the czech republic section of the elbe river. the descriptive part of the study was primarily aimed at comparative evaluation of the hg load during the period 1991-1996. the conclusions were supported by multivariate statistical analyses of the content of hg in the muscle tissue of 1251 fish belonging to 23 species with four do ... | 2005 | 15883097 |
| heavy metals in water, sediment and tissues of leuciscus cephalus from a stream in southwestern turkey. | concentrations of heavy metals (cd, cr, cu, pb and zn) were measured in water, bottom sediment and tissues (muscle and gills) of leuciscus cephalus from the dipsiz stream in the yatagan basin (southwestern turkey), the site of a thermal power plant. results for levels in water were compared with national and international water quality guidelines, as well as literature values were reported for streams and rivers. comparisons were made of metal concentrations in water and sediment with those in t ... | 2006 | 16325225 |
| population dynamics of lernaea cyprinacea (crustacea: copepoda) on four cyprinid species. | a total of 217 barbus graellsii, 54 barbus haasi, 417 cyprinus carpio and 85 leuciscus cephalus captured at 9 sampling stations in the central basin of the llobregat river (ne spain) were studied for lernaea cyprinacea parasitism. prevalence (b. graellsii 39.2, b. haasi 31.5, c. carpio 8.4, l. cephalus 48.2), intensity of infection (b. graellsii range 1 to 39, mean 4.6; b. haasi range 1 to 7, mean 2.6; c. carpio range 1 to 16, mean 3.1; l. cephalus range 1 to 8, mean 2.4), and abundance (b. grae ... | 2005 | 16385816 |
| substrate characterisation of a recombinant sulfotransferase sult1 and mrna expression in chub (leuciscus cephalus) tissues. | we have studied the role and regulation of sulfonation of xenobiotics and endogenous substrates in leuciscus cephalus, an abundant and environmentally relevant freshwater fish. a sulfotransferase 1 (sult1) cdna and promoter region was cloned from chub liver and the cdna expressed in escherichia coli. the translated protein displayed 51% and 50% amino acid identity to msult1d1, hsult1a1, respectively. we identified two conserved co-substrate binding motifs for 3'-phosphoadenosine 5'-phosphosulfat ... | 2006 | 16962072 |
| accumulation of some metals in muscles of five fish species from lower nitra river. | this paper reports the results of accumulated selected metals concentrations (fe, mn, zn, cu, ni, co, cr, pb, cd, hg and mehg) in the muscle of five common slovak fish species (chub-leuciscus cephalus, common carp-cyprinus carpio, prussian carp-carassius gibelio, roach-rutilus rutilus, and wels catfish-silurus glanis). furthermore, correlations among the selected metals and order of metal accumulation in the fish muscle were determined. the concentrations of metals (mg/kg wet weight basis) range ... | 2006 | 17000549 |
| dioxins and dioxin-like pcbs in different fish from the river elbe and its tributaries, germany. | in a long-term program polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (pcdd/fs) as well as dioxin-like polychlorinated biphenyls (dl-pcbs) were analyzed in the muscle tissue of eels (anguilla anguilla), bream (abramis brama), european chub (leuciscus cephalus) and ide (leuciscus idus) from the river elbe and its tributaries mulde and saale. the variation of the pcdd/f and dl-pcb concentrations in all fish samples is very large, whereby the dl-pcbs predominate in comparison t ... | 2007 | 17382467 |
| brominated flame retardants and related chlorinated persistent organic pollutants in fish from river elbe and its main tributary vltava. | brominated flame retardants (bfrs) are widely used industrial chemicals, residues of which can be nowadays found in all environmental compartments. the widespread presence of bfrs in various environmental compartments and food chain is a consequence of both their broad application area and physico-chemical properties, such as resistance to degradation and high lipophilicity. alike in the case of other halogenated persistent organic pollutants (pops), fish can be used as a bioindicator of aquatic ... | 2007 | 17673273 |
| organochlorine and mercury contamination in fish tissues from the river nestos, greece. | polychlorinated biphenyls (pcbs), hexachlorocyclohexane (hch) isomers, dichlorodiphenyltrichloroethane (ddt) and its metabolites, other organochlorine pesticides such as hexachlorobenzene (hcb), chlordane compounds (chls, including trans-chlordane and cis- and trans-nonachlor) and the heavy metal mercury were quantified in muscle and liver of the european chub (leuciscus cephalus, linnaeus, 1758) and in the muscle of the barbel (barbus cyclolepis, heckel, 1837) at two sampling sites of the river ... | 2008 | 17688909 |
| fish as biomonitors of polybrominated diphenyl ethers and hexabromocyclododecane in czech aquatic ecosystems: pollution of the elbe river basin. | background: brominated flame retardants (bfrs)--polybrominated diphenyl ethers (pbdes) and hexabromocyclododecane (hbcd)--belong to the group of relatively "new" environmental contaminants. the occurrence of these compounds in the czech aquatic ecosystem was for the first time documented within the 3-year monitoring study initiated in 2001. in 2002-2003 hbcd and the major pbde congeners (28, 47, 49, 66, 85, 99, 100, 153, 154, and 183) were found in 136 freshwater fish samples collected from seve ... | 2007 | 18174947 |
| concentration of heavy metals in water and chub, leuciscus cephalus (linn.) from the river yildiz, turkey. | the concentration of heavy metals (cu, fe and zn) were determined by atomic absorption spectrophotometry in the river water and the edible muscle tissues of chub, leuciscus cephalus, from river yildiz, turkey, and in the waste water the following results were found in the water of the river yildiz: cu 0.03-0.53, fe 0.91-1.96 and zn, 053-1.49 microgl(-1), in the waste water cu 0.20-0.52, fe 1.22-2.29 and zn 0.92-1.46 microgl(-1) and in the edible muscle of chub: cu 1.00-3.79, fe 7.21-17.04 and zn ... | 2007 | 18405123 |
| long term gyrodactylus lomi infection on isolated juvenile chub (leuciscus cephalus). | previous studies on long term gyrodactylid infections on isolated fish have shown that for the majority of gyrodactylus-fish interactions, infections peak at a maximum level and then decline as the host mounts an effective immune response. in the current study, juvenile chub collected from the wild still harboured gyrodactylus lomi infections after 6 - 10 months in the laboratory despite being individually maintained at 12 c. | 2008 | 18576882 |
| chromosome studies of european cyprinid fishes: interspecific homology of leuciscine cytotaxonomic marker-the largest subtelocentric chromosome pair as revealed by cross-species painting. | leuciscine cyprinids possess a nearly invariant diploid number (2n = 50) with an extremely uniform karyotype comprising of 8 pairs of metacentric, 13-15 pairs of submetacentric and 2-4 pairs of subtelocentric (st) to acrocentric (a) chromosomes. the largest pair is characteristically an st/a element-the 'leuciscine' cytotaxonomic marker. previously, the interspecific homology of this chromosome pair could not be assessed owing to the inability to produce euchromatic or serial banding patterns. i ... | 2008 | 18709543 |
| the comparison of heavy metal accumulation ratios of some fish species in enne dame lake (kütahya/turkey). | the metal accumulation levels for muscle, skin, gill, liver and intestine tissues of some cyprinidae species (carassius carassius, condrostoma nasus, leuciscus cephalus and alburnus alburnus) in enne dame lake (kütahya/turkey), which is mostly fed by hot spring waters, were investigated. analyses were performed for copper (cu), zinc (zn), manganese (mn), iron (fe), cobalt (co), magnesium (mg), nickel (ni), chrome (cr) and boron (b) using inductively coupled plasma-optic emission spectroscopy (ic ... | 2009 | 18843546 |
| monofilament gillnet selectivity parameters for european chub (leuciscus cephalus l.1758) in atikhisar reservoir, canakkale, turkey. | selectivity parameters of gillnets used for fish catching are very important for fisheries management in lakes. the main purpose of the present study was to estimate the selectivity parameters of monofilament gill nets mesh size of 56, 64 and 72 mm (stretched mesh size) used for european chub (leuciscus cephalus l.1758) in atikhisar reservoir, canakkale, turkey. the indirect method proposed by holt was used for the estimation of the selectivity parameters. the common selection factors and common ... | 2007 | 19069933 |
| the study of heavy metal pollution and accumulation in water, sediment, and fish tissue in kizilirmak river basin in turkey. | the accumulation of heavy metals such as pb, hg, co, cr, cu, zn, and br were determined in water, sediment, muscle, and gill of three fish species (leuciscus cephalus, capoeta tinca, capoeta capoeta) which were collected in kizilirmak river basin (delice river). the metal concentration showed a general trend of br>zn>pb>cr>cu>hg>co in water and cr>zn>pb>cu>co>hg>br in sediment samples while zn>cu>pb>br>cr>hg>co were in muscle and zn>pb>cu>cr>br>hg>co were in the gill tissue. | 2010 | 19609698 |
| effects of a chemically polluted discharge on the relationship between fecundity and parasitic infections in the chub (leuciscus cephalus) from a river in southern england. | in fish there is a close association between endocrine and immune function that during seasonal changes in reproductive status can affect the fishes susceptibility to parasitic infection. the effects of endocrine-disrupting pollution on this association are not known. the present study investigates the effects of a chemically polluted (ammoniacal nitrogen, zinc, bromide) discharge in cranleigh waters, a river in southern england, on the fecundity and parasitism of chub, leuciscus cephalus, over ... | 2010 | 19756842 |
| [a study on the helminth fauna linked to seasonal changes and size of the fish host, leuciscus cephalus l., from lake dam orenler, afyonkarahisar]. | in this study, the presence of helminths on 103 leuciscus cephalus from the orenler dam lake, turkey was investigated from july 2007 to may 2008. five parasite species were found in the host fish: of these species dactylogyrus vistuale was found in the gills (42.7%, 10.6+/-14.8 parasite/fish), diplostomum sp. in the lens of eyes (12.6%, 4.1+/-4.0), bothriocephalus acheilognathi in the intestine (23.3%, 4.8+/-10.4), ligula intestinalis in the body cavity (12.6%, 2.1+/-1.2), and pomphorhynchus lae ... | 2009 | 19851976 |
| perfluorooctanoic acid and perfluorooctane sulfonate in two fish species collected from the roter main river, bayreuth, germany. | perfluorooctanoic acid (pfoa) and perfluorooctane sulfonate (pfos) are widely distributed in the environment. in this study the accumulation potential of pfoa and pfos in two fish species with different feeding strategies, i.e. chub (leuciscus cephalus) and river goby (gobio gobio) inhabiting a river receiving treated waste waters from a municipal waste water treatment plant, were estimated. pfos was detected in chub (7-250 microg kg(-1) wet weight) and river goby (70-400 microg kg(-1) wet weigh ... | 2010 | 19946664 |
| chemical contaminants in fish species from rivers in the north of luxembourg: potential impact on the eurasian otter (lutra lutra). | contamination levels of pcbs, and of the heavy metals cadmium (cd), lead (pb) and mercury (hg) were analyzed in four fish species from seven rivers in the north of luxembourg. during august and september 2007, 85 samples of fish were collected belonging to four species: the stone loach (barbatula barbatula, n=12 pools), the chub (squalius cephalus, n=36), the barbel (barbus barbus, n=23) and eel (anguilla anguilla, n=14). the concentration of seven indicator pcbs ( summation operator(7)pcbs) rea ... | 2010 | 20060148 |
| accumulation of heavy metals with water quality parameters in kızılırmak river basin (delice river) in turkey. | kızılırmak river has been used as ankara's drinking water source for approximately 1.5 years. therefore, this region's water, sediment, and fish samples are measured for detecting the heavy metals. this is important for the current situation as well as the future in terms of potential impact. the amount of heavy metals in drinking water should be within the limited values; otherwise, the accumulation of heavy metals will cause many problems to living organisms. especially high levels of arsenic, ... | 2011 | 20204694 |
| endoparasites of chub (leuciscus cephalus) in two rivers of the abruzzo region of italy. | the relationship between communities of chub endoparasites (leuciscus cephalus) fished in the orta and pescara rivers in the abruzzo region of italy, and the quality of the water in which they are caught, were studied in surveys designed to evaluate the feed quality of fish in the inland waters of the abruzzo. samples were taken monthly from october 2000 to september 2001 in the orta river (buscesi district) and the pescara river (near the villareia bridge); a total of 86 chub were caught. durin ... | 2006 | 20429064 |
| use of histopathological indicators on chub (leuciscus cephalus) and brown trout (salmo trutta fario) in evaluating river environments. | a multidisciplinary study was conducted on water from two rivers in the abruzzo region of italy. the study highlighted the importance of histopathological investigations in the evaluation of the environmental impact on fish. brown trout (salmo trutta fario) from the aterno river and chub (leuciscus cephalus) from the vomano river were sampled in winter and then again in spring. histopathological investigations of gills, kidneys and livers revealed inflammatory and degenerative lesions, early war ... | 2005 | 20437378 |
| [investigations on ligula intestinalis plerocercoid l., 1758 infection of some fishes from dam lake kunduzlar (kirka, eskişehir).]. | in this study, the presence of ligula intestinalis plerocercoid in some fish species (cyprinus carpio, carassius gibelio, barbus plebejus, capoeta tinca, chondrostoma nasus, leuciscus cephalus, alburnus escherichii) from the kunduzlar dam, turkey was investigated between august 2008 and may 2009. by the end of the study, ligula intestinalis plerocercoid haqs been identified in the body cavity of 3 host fishes [chondrostoma nasus (1.1%, 5.0+/-0), leuciscus cephalus (12.1%, 1.5+/-0,6), and alburnu ... | 2010 | 20597057 |
| a multivariate comparison of the stress response in three salmonid and three cyprinid species: evidence for inter-family differences. | the response of six species of freshwater fishes, from the families cyprinidae (common carp cyprinus carpio, roach rutilus rutilus and chub leuciscus cephalus) and salmonidae (rainbow trout oncorhynchus mykiss, brown trout salmo trutta and arctic charr salvelinus alpinus), to a standardized stressor was evaluated. a 6 h period of confinement resulted in changes to plasma cortisol, glucose, amino acid and lactate levels compared with unconfined controls. there were significant differences in the ... | 2010 | 20666900 |
| mercury content in the trophic chain of the tanew river, poland, ecosystem. | mercury (hg) is a highly toxic metal posing a hazard to water ecosystems. this investigation was aimed at determining hg content in the tanew river, poland, and subsequent transfer to fish inhabiting this lake. the area studied included approximately a 50-km distance of the river, with 5 sampling locations selected. samples of water and bottom sediments were collected from 10 sites along the river-bank zone for each location. at the same location, fish were caught and samples of coastal water pl ... | 2010 | 20706942 |
| spatiotemporal trends of heavy metal concentrations in fish of the river morava (danube basin). | the aim of this study was to assess mercury (hg), cadmium (cd) and lead (pb) contamination in muscle tissue of fishes over the longitudinal profile of the river morava (czech republic, danube basin) and to detect any temporal trends over the past 18 years. fish samples were collected in 1992, 1998, 2000, 2003 and 2009 at 6 study sites situated just downstream of important pollution sources. chub (leuciscus cephalus l.) were selected as indicator species at 5 sites, and brown trout (salmo trutta ... | 2010 | 20981604 |
| biochemical markers for the assessment of aquatic environment contamination. | the need for assessment of aquatic ecosystem contamination and of its impact on water dwelling organisms was developed in response to rising aquatic environmental pollution. in this field study, liver enzymes of phase i and phase ii of xenobiotic transformation, namely cytochrome p450, ethoxyresorufin-o-deethylase, glutathione-s-transferase and tripeptide glutathione were used to assess the contamination of the aquatic environment at different rivers in the czech republic. the indicator species ... | 2008 | 21218108 |
| fish hepatic glutathione-s-transferase activity is affected by the cestode parasites schistocephalus solidus and ligula intestinalis: evidence from field and laboratory studies. | summarythe activity of hepatic glutathione-s-transferase (gst) was analysed in 3 different fish species with respect to fish sex and infection with parasites. in both sexes of laboratory bred three-spined sticklebacks (gasterosteus aculeatus) experimentally infected with schistocephalus solidus (cestoda), a significantly lower gst-activity was found for infected fish compared to control. after field sampling of roach (rutilus rutilus) from lake müggelsee (ms) and the reservoir listertalsperre (l ... | 2011 | 21518465 |
| observations on the bionomy of allocreadium isoporum (looss, 1894) (trematoda: allocreadiidae). | from october 1985 until july 1987, the bionomy of the trematode allocreadium isoporum (looss, 1894) was studied in the rokytná river (the danube basin), czechoslovakia. while clams of the genera sphaerium scopoli and pisidium pfeiffer apparently serve as its first intermediate hosts, mayfly larvae ephemera danica müll. were found (prevalence 8%, intensity 1-5 metacercariae per mayfly) to be the only second intermediate host of a. isoporum in the locality. the most important definitive host is ch ... | 1992 | 1644360 |
| infections of ligula intestinalis on freshwater fish in kars plateau of north-eastern anatolia, turkey. | this study was conducted to determine the prevalence of ligula intestinalis and infections caused by these on freshwater fish in rivers and streams in the kars plateau of north-eastern anatolia, turkey. | 2015 | 26470929 |
| new data on the karyotype and chromosomal rdna location in paradiplozoon megan (monogenea, diplozoidae), gill parasite of chubs. | new morphological data on chromosome complement of diplozoid parasite paradiplozoon megan from the chub squalius cephalus are shown herein. the karyotype of p. megan is characterized by seven pairs (2n = 14) of medium long (up to 11 μm) one-armed chromosomes which are nearly identical in number and morphological classification with chromosomes of other paradiplozoon species described karyologically to date (paradiplozoon bliccae, paradiplozoon nagibinae, paradiplozoon sapae, paradiplozoon pavlov ... | 2014 | 25193046 |
| interactions of warming and exposure affect susceptibility to parasite infection in a temperate fish species. | predicting how elevated temperatures from climate change alter host-parasite interactions requires understandings of how warming affects host susceptibility and parasite virulence. here, the effect of elevated water temperature and parasite exposure level was tested on parasite prevalence, abundance and burden, and on fish growth, using pomphorhynchus laevis and its fish host squalius cephalus. at 60 days post-exposure, prevalence was higher at the elevated temperature (22 °c) than ambient tempe ... | 2016 | 27225942 |
| occurrence of immune cells in the intestinal wall of squalius cephalus infected with pomphorhynchus laevis. | a sub-population of 34 specimens of chub, squalius cephalus, was sampled from the river brenta (northern italy) and examined for ecto- and endo-parasites. pomphorhynchus laevis (acanthocephala) was the only enteric helminth encountered. immunofluorescence and ultrastructural studies were conducted on the intestines of chub. near the site of parasite's attachment, mucous cells, mast cells (mcs), neutrophils and rodlet cells (rcs) were found to co-occur within the intestinal epithelium. the number ... | 2015 | 26434712 |
| enteric neuromodulators and mucus discharge in a fish infected with the intestinal helminth pomphorhynchus laevis. | in vertebrates, the presence of enteric worms can induce structural changes to the alimentary canal impacting on the neuroendocrine system, altering the proper functioning of the gastrointestinal tract and affecting the occurrence and relative density of endocrine cells (ecs). this account represents the first immunohistochemistry and ultrastructure-based study which documents the intimate relationship between the intestinal mucous cells and ecs in a fish-helminth system, investigating the poten ... | 2015 | 26152567 |
| pomphorhynchus laevis (acanthocephala) from the sava river basin: new insights into strain formation, mtdna-like sequences and dynamics of infection. | here we report the genetic variability and presence of mtdna-like sequences of pomphorhynchus laevis from the chub, squalius cephalus, caught at the sampling sites along the sava river and its tributary the sutla river in croatia. sequences of the cytochrome c oxidase subunit 1 (coi) gene of the recovered p. laevis specimens were used for haplotype network construction and phylogenetic analysis. these analyses showed that some specimens contained mitochondrial-like sequences, and they uncovered ... | 2015 | 25728305 |
| responses of squalius cephalus intestinal mucous cells to pomphorhynchus laevis. | intestinal mucous cell numbers and their glycoconjugate composition were investigated by histochemical methods in uninfected chub, squalius cephalus, and in conspecifics naturally parasitised with the acanthocephalan pomphorhynchus laevis. a sub-population of 42 chub from the river tiber (perugia, italy) were sampled and screened for ecto and endoparasites. no parasites were found in gills and in other visceral organs of chub and p. laevis appeared to be the only enteric worm encountered. in all ... | 2015 | 25486440 |
| does fish reproduction and metabolic activity influence metal levels in fish intestinal parasites, acanthocephalans, during fish spawning and post-spawning period? | application of fish intestinal parasites, acanthocephalans, as bioindicators in metal exposure assessment usually involves estimation of their metal levels and bioconcentration factors. metal levels in parasite final host, fishes, are influenced by fish physiology but there is no data for acanthocephalan metal levels. gastrointestinal zn, fe, mn, cd, ag levels in european chub (squalius cephalus l.) from the sava river were significantly higher during chub spawning (april/may) compared to the po ... | 2014 | 25048939 |
| effect of acanthocephalan infection on metal, total protein and metallothionein concentrations in european chub from a sava river section with low metal contamination. | in the present study, the importance of considering fish intestinal parasites i.e. the acanthocephalans in metal exposure assessment was estimated under low metal contamination conditions. two acanthocephalan species, pomphorhynchus laevis and acanthocephalus anguillae were examined in 59 specimens of european chub (squalius cephalus l.) sampled at 5 locations along the sava river, croatia. concentrations of essential (cu, mn) and non-essential (ag, cd, pb) metals were higher in intestinal paras ... | 2013 | 23856403 |
| development and validation of a biodynamic model for mechanistically predicting metal accumulation in fish-parasite systems. | because of different reported effects of parasitism on the accumulation of metals in fish, it is important to consider parasites while interpreting bioaccumulation data from biomonitoring programmes. accordingly, the first step is to take parasitism into consideration when simulating metal bioaccumulation in the fish host under laboratory conditions. in the present study, the accumulation of metals in fish-parasite systems was simulated by a one-compartment toxicokinetic model and compared to un ... | 2016 | 27548282 |
| fish fin-clips as a non-lethal approach for biomonitoring of mercury contamination in aquatic environments and human health risk assessment. | muscle tissue and pectoral fins of two important indicator fish species, frequently used in biomonitoring programs, were sampled and analysed for total mercury content (thg) at six localities within the czech republic. the relationship between mercury concentration in muscle and in fin-clips was described. mean values of thg fin-clip concentration correlate significantly (p < 0.01) with those measured in muscle of indicator fish. concerning comparison among localities, a coefficient of determina ... | 2016 | 27543678 |
| 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 |
| shifts in the climate space of temperate cyprinid fishes due to climate change are coupled with altered body sizes and growth rates. | predictions of species responses to climate change often focus on distribution shifts, although responses can also include shifts in body sizes and population demographics. here, shifts in the distributional ranges ('climate space'), body sizes (as maximum theoretical body sizes, l∞) and growth rates (as rate at which l∞ is reached, k) were predicted for five fishes of the cyprinidae family in a temperate region over eight climate change projections. great britain was the model area, and the mod ... | 2016 | 26824727 |
| content of polychlorinated dibenzo-p-dioxins, dibenzofurans and dioxin-like polychlorinated biphenyls in fish from latvian lakes. | seventeen polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (pcdd/pcdfs) of the highest priority as well as twelve dioxin-like polychlorinated biphenyls (dl-pcbs) were analyzed in the muscle tissues of the following freshwater fish species sampled from eleven latvian freshwater lakes: perch (perca flavescens), carp (cyprinus carpio), eel (anguilla rostrata), bream (abramis brama), chub (leuciscus cephalus), pike (esox lucius), sheatfish (silurus glanis) and roach (rutilus). to ... | 2013 | 23336927 |
| cross-species amplification of 41 microsatellites in european cyprinids: a tool for evolutionary, population genetics and hybridization studies. | cyprinids display the most abundant and widespread species among the european freshwater teleostei and are known to hybridize quite commonly. nevertheless, a limited number of markers for conducting comparative differentiation, evolutionary and hybridization dynamics studies are available to date. | 2010 | 20478030 |
| a fine structural review on the spermatozoa of cyprinidae with attention to their phylogenetic implications. | the fine structural organization and dimensions of spermatozoa from species of 4 subfamilies of the cyprinidae (barbus barbus, carassius carassius, cyprinus carpio carpio, cyprinus carpio haematopterus, abramis brama, alburnoides bipunctatus, alburnus alburnus, chalcalburnus chalcoides mento, chondrostoma nasus, hypophthalmichthys molitrix, leuciscus cephalus, phoxinus phoxinus, rutilus rutilus, rutilus meidingerii, scardinius erythrophthalmus, vimba vimba and ctenopharyngodon idella) are compar ... | 2009 | 19688692 |
| patterns of brain morphology in mid-european cyprinidae (pisces, teleostei): a quantitative histological study. | the present study considers patterns of brain morphology in 14 common species of mid-european cyprinidae. sixteen areas per brain were measured on serial cryostat sections by computer-aided planimetry. the volumes of these areas were expressed as % of the total brain volume. these brain centres (ranked according to falling values of the coefficient of variation vr, of the interspecific mean) are: lobus facialis, l. vagus, central acustic area, crista cerebellaris, bulbus olfactorius, eminentia g ... | 1988 | 3418119 |
| concentrations of arsenic and boron in water, sediment and the tissues of fish in emet stream (turkey). | in this study, the concentrations of arsenic and boron were determined in the water and the sediment, as well as in the muscle tissues of squalius cephalus, alburnoides bipunctatus, barbus plebejus and capoeta tinca from emet stream. the fish samples were caught in may 2011 and september 2012. the metal concentrations in the water samples were as follows: arsenic was 137.1-1002 µg l(-1), and boron was 2421-14490 µg l(-1). the metal concentrations in the sediment samples were as follows: arsenic ... | 2016 | 27933330 |
| evaluation of parasite fauna in fish of alborz dam. | in this study on fish parasites of alborz dam in iran, 202 fish were caught in years 2010-2011. caught fish include leucissus cephalus, alburnoides bipunctatus, neogobius flaviatilis. samples transferred alive to babol university lab and after investigate, these parasites were identified. one species of protozoan (icthyophithirious), 4 genus of monogen (gyrodoctylus. sp, dactylogyrus. sp, diplozoon. sp, paradiplozoon. sp), one species of cestode (bothriocephalus gow kongensis) and one genus of n ... | 2016 | 27065611 |
| are in vitro methods for the detection of endocrine potentials in the aquatic environment predictive for in vivo effects? outcomes of the projects schussenaktiv and schussenaktivplus in the lake constance area, germany. | many studies about endocrine pollution in the aquatic environment reveal changes in the reproduction system of biota. we analysed endocrine activities in two rivers in southern germany using three approaches: (1) chemical analyses, (2) in vitro bioassays, and (3) in vivo investigations in fish and snails. chemical analyses were based on gas chromatography coupled with mass spectrometry. for in vitro analyses of endocrine potentials in water, sediment, and waste water samples, we used the e-scree ... | 2014 | 24901835 |
| the trace element analysis in freshwater fish species, water and sediment in iyidere stream (rize-turkey). | many environmental problems like dam construction, agricultural debris, flooding and industrial establishments threaten iyidere stream (rize, turkey) on the southeastern coast of the black sea (turkey). the trace element concentrations in water, fish and sediments in lyidere stream (rize, turkey) were investigated in this study. the concentration of six different elements in ten freshwater fish species and sediment was determined using energy dispersive x-ray fluorescence method. a radioisotope ... | 2012 | 24171246 |
| rhabdospora thelohani laguessé, 1895 (apicomplexa): new host and geographic records with taxonomic considerations. | new fish species and geographic records for rhabdospora thelohani laguessé, 1895 (rodlet cells) are presented. additionally, the ultrastructure of r. thelohani in alburnoides bipunctatus ohridanus karaman, borostomias antarcticus (lönnberg), leuciscus cephalus albus bonaparte and rutilus rubilio (bonaparte) is compared with that reported by other authors and with members of subphylum apicomplexa. the ultrastructure of r. thelohani was similar in all the fish species examined; however, the organi ... | 1979 | 490430 |
| comparative analysis of glucosephosphate isomerase, lactate dehydrogenase and malate dehydrogenase isozymes in 9 cyprinid species from italy. | the developmental and the tissue-specific expression of glucosephosphate isomerase (gpi), lactate dehydrogenase (ldh) and malate dehydrogenase (mdh) multilocus isozymes were analyzed in samples of leuciscus cephalus and the adult patterns compared with those of 8 additional italian cyprinid species: alburnus alburnus alborella, chondrostoma genei, l. lucumonis, l. souffia, rutilus rubilio, r. erythrophthalmus, scardinius erythrophthalmus and tinca tinca, the taxonomic status of many of them bein ... | 1998 | 18462025 |
| [changes in the content of chlorinated pesticides and polychlorobiphenyls in the fishes club (leuciscus cephalus) and bleak (alburnus alburnus) in the po]. | | 2013 | 6817305 |
| dna reassociation kinetics in diploid and phylogenetically tetraploid cyprinidae. | four diploid and three phylogenetically tetraploid cyprinidae (ostariophysi) have been characterized as for nuclear dna content, modal chromosome number and dna reassociation kinetics (hydroxyapatite chromatography). among the diploid species nuclear dna content (10(-12) g dna/2c) was 1.62 for tinca tinca, 1.87 for scardinius erythrophthalmus, 2.53 for leuciscus cephalus and 2.75 for alburnus alburnus, while the phylogenetically tetraploid species carassius auratus, barbus barbus and cyprinus ca ... | 1979 | 490124 |
| protective responses of intestinal mucous cells in a range of fish-helminth systems. | histopathological, immunofluorescence and ultrastructural studies were conducted on the intestines of four fish species infected with different taxa of enteric helminths. brown trout (salmo trutta trutta), eel (anguilla anguilla) and tench (tinca tinca) obtained from lake piediluco (central italy) were examined. brown trout and eel were infected with two species of acanthocephalans, and tench was parasitized with a tapeworm species. in addition to the above site, specimens of chub (squalius ceph ... | 2016 | 28026022 |
| polychlorinated dibenzodioxins, dibenzofurans, and biphenyls in fresh water fish from campania region, southern italy. | twenty-eight fish muscle specimens from the main water bodies of the campania region were analyzed in our laboratory. on average, results showed a low contamination by pcdds+pcdfs and a relatively more important presence of dl-pcbs. all specimens were compliant with eu regulatory maximum levels. cumulative pcdd+pcdf+dl-pcb concentrations (teq(tot)) were comprised in the range 0.223-11.4 pgwho(97)-teq g(-1) fresh weight (fw). dl-pcb contribution to teq(tot) was on average greater than 86% (range, ... | 2013 | 22921647 |
| arsenic speciation in freshwater fish: focus on extraction and mass balance. | arsenic (as) speciation in muscle tissues of freshwater fish was investigated with special emphasis on extraction yields and mass balances. for the quantification of water-soluble as compounds, samples were extracted using a 1:1 (v/v) methanol/water mixture. various extraction parameters, such as extraction volume, number of additional extractions, intermediate and final volume in sample preconcentration were optimized so as to improve the extraction efficiency. arsenic compounds were determined ... | 2010 | 20188911 |
| molecular genetic studies on morphologically indistinguishable myxobolus spp. infecting cyprinid fishes, with the description of three new species, m. alvarezae sp. nov., m. sitjae sp. nov. and m. eirasianus sp. nov. | while studying myxobolus gill infections of cyprinid fishes, the authors found large, segmented plasmodia in three species: ide (leuciscus idus), asp (aspius aspius) and white bream (blicca bjoerkna). as regards their size and morphology, the spores from these plasmodia corresponded to those of m. dujardini described from chub (leuciscus cephalus). however, the 18s rdna sequences of spores from the three cyprinids differed from those of m. dujardini. based on molecular differences, this paper de ... | 2012 | 23129194 |
| molecular diversity of germany's freshwater fishes and lampreys assessed by dna barcoding. | this study represents the first comprehensive molecular assessment of freshwater fishes and lampreys from germany. we analysed coi sequences for almost 80% of the species mentioned in the current german red list. in total, 1056 dna barcodes belonging to 92 species from all major drainages were used to (i) build a reliable dna barcode reference library, (ii) test for phylogeographic patterns, (iii) check for the presence of barcode gaps between species and (iv) evaluate the performance of the bar ... | 2015 | 25186809 |
| cloning of a chub metallothionein cdna and development of competitive rt-pcr of chub metallothionein mrna as a potential biomarker of heavy metal exposure. | metallothionein has been assayed in a range of aquatic animal tissues as an indicator of metal exposure. we sequenced chub (leuciscus cephalus) metallothionein cdna which showed over 90% homology to common carp, goldfish and stone loach and 77% homology to rainbow trout sequences for metallothionein. we then used the extended primer method to develop an accurate quantitative competitive rt-pcr assay for metallothionein mrna. rt-pcr was used to measure metallothionein mrna in feral chub from a ra ... | 2015 | 15178096 |
| characterizing the trophic niches of stocked and resident cyprinid fishes: consistency in partitioning over time, space and body sizes. | hatchery-reared fish are commonly stocked into freshwaters to enhance recreational angling. as these fishes are often of high trophic position and attain relatively large sizes, they potentially interact with functionally similar resident fishes and modify food-web structure. hatchery-reared barbel barbus barbus are frequently stocked to enhance riverine cyprinid fish communities in europe; these fish can survive for over 20 years and exceed 8 kg. here, their trophic consequences for resident fi ... | 2016 | 27547336 |
| high variability in stable isotope diet-tissue discrimination factors of two omnivorous freshwater fishes in controlled ex situ conditions. | diet-tissue discrimination factors (δ(13)c and δ(15)n) are influenced by variables including the tissues being analysed and the taxon of the consumer and its prey. whilst differences in δ(13)c and δ(15)n are apparent between herbivorous and piscivorous fishes, there is less known for omnivorous fishes that consume plant and animal material. here, the omnivorous cyprinid fishes barbus barbus and squalius cephalus were held in tank aquaria and exposed to three diets that varied in their constituen ... | 2016 | 26896544 |