| [the role of the owsianka leucaspius delineatus in maintaining opisthorchiasis foci in novosibirsk province]. | materials reflecting opisthorchiasis infection in fish in the novosibirsk region were analyzed. on the basis of fish population estimation and studies on its invasion with opisthorchis felineus (rivolta, 1884) it was shown that a considerable part in maintaining opisthorchiasis foci is played by leucaspius delineatus. it is numerous, can easily acclimatize itself in natural water bodies, inaccessible for predatory animals, easily infected with opisthorchis larvae, and therefore can play an impor ... | 1989 | 2628714 |
| [changes in the concentration of nucleic acids in leucaspius delineatus gonads under the influence of uranium]. | | 1965 | 5857068 |
| [regeneration in the tectum opticum of leucaspius delineatus (heckel 1843)]. | | 1965 | 5888093 |
| x-ray microanalysis of myotomal muscle in the sunbleak, leucaspius delineatus (heckel) and goldfish, carassius auratus gibelio. | the functioning of a group of muscle fibres as a tissue that performs a well characterized type of contraction (slow or fast) depends on their biochemical and structural organization that is already well established. the biochemical and structural diversities between three types of fish muscle fibres found also a reflection in the content of light elements. the present work demonstrates significant differences in the content of diffusible elements (cl, k, na, and mg) and bound elements (p and s) ... | 1999 | 10754791 |
| accumulation and loss of lindane in the muscles, liver and brain of some freshwater fish after intoxication with gamacarbatox suspension. | experiments were conducted under laboratory conditions on young specimens of carassius carassius l., cyprinus carpio l. and on adult specimens of leucaspius delineatus haeckel. the fish were subjected to a 30-day exposure to gamacarbatox suspension in a dose of 0.5 mg 1-1, containing 10% of lindane as active substance. directly after the experiment on day 30, and then 40 and 50, lindane content was assessed in the muscles, liver and brain using the method of gas chromatography with an electron c ... | 2002 | 12533964 |
| comparative study of microcystin-lr-induced behavioral changes of two fish species, danio rerio and leucaspius delineatus. | the spontaneous locomotor behavior separated into day/night activity phases of two fish species danio rerio and leucaspius delineatus was recorded and quantified continuously under sublethal long-term exposure to microcystin-lr in tanks. microcystin-lr was applied in concentrations of 0.5, 5, 15, and 50 microg l(-1). by using an automated video-monitoring and object-tracing system, the average motility (swimming velocity) and the average number of turns were assessed. clear dose-dependent effect ... | 2004 | 15526272 |
| biodiversity: disease threat to european fish. | the deliberate introduction of new species can have unexpected negative consequences and we show here how a recently introduced fish, the invasive asian cyprinid pseudorasbora parva, is causing increased mortality and totally inhibiting spawning in an already endangered native fish, the european cyprinid leucaspius delineatus. this threat is caused by an infectious pathogen, a rosette-like intracellular eukaryotic parasite that is a deadly, non-specific agent. it is probably carried by healthy a ... | 2005 | 15973399 |
| 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 |
| target gene approaches: gene expression in daphnia magna exposed to predator-borne kairomones or to microcystin-producing and microcystin-free microcystis aeruginosa. | two major biological stressors of freshwater zooplankton of the genus daphnia are predation and fluctuations in food quality. here we use kairomones released from a planktivorous fish (leucaspius delineatus) and from an invertebrate predator (larvae of chaoborus flavicans) to simulate predation pressure; a microcystin-producing culture of the cyanobacterium microcystis aeruginosa and a microcystin-deficient mutant are used to investigate effects of low food quality. real-time quantitative polyme ... | 2009 | 19917101 |
| influence of host reproductive state on sphaerothecum destruens prevalence and infection level. | sphaerothecum destruens is an obligate intracellular parasite with the potential to cause high mortalities and spawning inhibition in the endangered cyprinid leucaspius delineatus. we investigated the influence of l. delineatus's reproductive state on the prevalence and infection level of s. destruens. a novel real time quantitative polymerarse chain reaction (qpcr) was developed to determine s. destruens' prevalence and infection level. these parameters were quantified and compared in reproduct ... | 2011 | 20663249 |
| flow cytometric determination of genome size in european sunbleak leucaspius delineatus (heckel, 1843). | the aim of this study was to compare dna content in hepatocyte and erythrocyte nuclei of the european sunbleak, leucaspius delineatus, in relation to nuclear and cell size by means of flow cytometry and fluorescence microscopy. the dna standards, chicken and rainbow trout erythrocytes, were prepared in parallel with both cell types, with initial separation of liver cells in pepsin solution followed by cell filtering. standards and investigated cells were stained with a mixture of propidium iodid ... | 2011 | 21614549 |
| sphaerothecum destruens pathology in cyprinids. | sphaerothecum destruens is a significant intracellular parasite of fish which has caused disease and mortalities in cultured north american chinook salmon oncorhynchus tshawytscha and atlantic salmon salmo salar. several hosts for s. destruens have been identified within the salmonidae family, and the histopathology of the infection can differ between hosts. recently, s. destruens has been associated with the most invasive cyprinid species in europe, topmouth gudgeon pseudorasbora parva. accurat ... | 2011 | 21848122 |
| introduced pathogens and native freshwater biodiversity: a case study of sphaerothecum destruens. | a recent threat to european fish diversity was attributed to the association between an intracellular parasite, sphaerothecum destruens, and a healthy freshwater fish carrier, the invasive pseudorasbora parva originating from china. the pathogen was found to be responsible for the decline and local extinction of the european endangered cyprinid leucaspius delineatus and high mortalities in stocks of chinook and atlantic salmon in the usa. here, we show that the emerging s. destruens is also a th ... | 2012 | 22615866 |
| isolation and culture of sphaerothecum destruens from sunbleak (leucaspius delineatus) in the uk and pathogenicity experiments in atlantic salmon (salmo salar). | the sunbleak (leucaspius delineatus), a cyprinid fish native to continental europe and now established in the uk, is experiencing population decline which appears to be linked to the spread of the invasive asian cyprinid (pseudorasbora parva). a population of sunbleak in the uk has previously been identified as infected with s. destruens at low prevalence. because sphaerothaecum destruens has, on occasion, caused severe disease in cultured and wild salmonids the aim of this work was to establish ... | 2012 | 22313601 |
| permanent genetic resources added to molecular ecology resources database 1 december 2012-31 january 2013. | this article documents the addition of 268 microsatellite marker loci to the molecular ecology resources database. loci were developed for the following species: alburnoides bipunctatus, chamaerops humilis, chlidonias hybrida, cyperus papyrus, fusarium graminearum, loxigilla barbadensis, macrobrachium rosenbergii, odontesthes bonariensis, pelteobagrus vachelli, posidonia oceanica, potamotrygon motoro, rhamdia quelen, sarotherodon melanotheron heudelotii, sibiraea angustata, takifugu rubripes, ta ... | 2013 | 23521844 |
| 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 |
| the school behavior of leucaspius delineatus (heckel) in relation to ambient space and the presence of a pike (esox lucius). | 1. tests were carried out to study school concentration in relation to quality of space and presence of a pike. 2. at a water depth of 60 cm (without pike) school concentration is very much lower than at 20 cm, both at 980 lux and at 0.02 lux. 3. at 0.02 lux in the absence of the predator, the shapes of the water space cannot be ascertained to have an influence. 4. at 980 lux (with and without pike) shape iv has an intense effect on school concentration. 5. in the dark (0.02 lux) the effect of a ... | 1980 | 28309642 |
| correlation between the feeding time of the pike (esox lucius) and the dispersion of a school of leucaspius delineatus. | the illumination level at which the pike (esox lucius) eats most leucaspius delineatus was compared to that at which the school of leucaspius disperses.the pike easts leucaspius predominantly when there is little light (50-75% of its entire prey at less than 1 lux).the school of leucaspius gradually disperses at less than 1 lux.a comparison of the results shows that by and large the pike captures leucaspius at illumination levels at which the school of leucaspius is no longer completely unified. ... | 1977 | 28309340 |
| laboratory and field validation of a simple method for detecting four species of non-native freshwater fish using edna. | this paper presents the first phase in the development and validation of a simple and reliable environmental (e)dna method using conventional pcr to detect four species of non-native freshwater fish: pumpkinseed lepomis gibbosus, sunbleak leucaspius delineatus, fathead minnow pimephales promelas and topmouth gudgeon pseudorasbora parva. the efficacy of the approach was demonstrated in indoor tank (44 l) trials in which all four species were detected within 24 h. validation was through two field ... | 2016 | 27465299 |