| 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 |
| time trends in fish populations in metropolitan france: insights from national monitoring data. | using the electrofishing database of the french national agency for water and aquatic environment (onema), the time trends of 48 freshwater fish taxa at 590 sites monitored for at least 8 years from 1990 to 2009 were investigated. the results demonstrated that species richness increased steadily from the beginning of the monitoring period. this is congruent with the finding that the number of species displaying a significant increase in spatial distribution or abundance was greater than those sh ... | 2011 | 22136235 |
| first detection of circovirus-like sequences in amphibians and novel putative circoviruses in fishes. | the negative samples of a collection, established originally for seeking new adeno- and herpesviruses in lower vertebrates, were screened for the pres-ence of circoviruses by a consensus nested pcr targeting the gene coding for the replication-associated protein. six fish samples representing five species, namely asp (aspius aspius), roach (rutilus rutilus), common bream (abramis brama), round goby (neogobius melanostomus) and monkey goby (neogobius fluviatilis), as well as three frog samples we ... | 2014 | 24334078 |
| new technique for fertilizing eggs of burbot, asp and ide under hatchery conditions. | the development of a new protocol for egg fertilization may increase embryo survival and benefit the aquaculture process. in the present study, a new technique of partially adding sperm to activated eggs in the artificial fertilization of burbot (lota lota), ide (leuciscus idus) and asp (aspius aspius) eggs was evaluated. if the same volume of sperm was divided into two or three parts and added to eggs in 30-60s intervals, it significantly improved embryo survival at the eyed-egg-stage of develo ... | 2016 | 27470201 |
| 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 |
| 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 guilds and food resource partitioning in a lake fish assemblage: an ontogenetic approach. | ontogenetic diet patterns and trophic guild structure of a 15 species temperate lake fish assemblage were analysed over wide size intervals (up to seven orders of magnitude in body mass), representing practically the whole life span in most species. a two-step objective clustering technique supplemented with other multivariate statistical tools proved that size-related diet changes clearly played an important role in structuring trophic organization of fishes inhabiting lake balaton. as many as ... | 2009 | 20738494 |
| piscivorous cyprinid fish modulates suction feeding kinematics to capture elusive prey. | previous studies have shown that evasive prey generally elicit a different kinematical pattern of prey capture from suction feeding fish compared to non-evasive types of prey. however, no evidence exists that predatory fish can modulate their prey capture kinematics in response to whether or not an elusive prey performs an escape response. here, we analyse prey capture kinematics of a specialist piscivore (asp, aspius aspius) during feeding on untethered, live goldfish, which regularly displayed ... | 2011 | 21185704 |
| 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 |
| histopathology of feral fish from a pcb-contaminated freshwater lake. | the purpose of this study was to evaluate the potential toxic effects of chronic sublethal polychlorinated biphenyl (pcb) exposure on feral fish, using histopathology as an endpoint. histopathological study of bream (abramis brama) and asp (aspius aspius) living in a pcb-polluted freshwater lake revealed abnormal cellular changes in the renal corpuscle of both species. dilation of glomerular capillaries (dgc), mesangial edema (me), an adhesion between visceral and parietal layers of bowman's cap ... | 2001 | 11436658 |
| 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 |
| 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 |
| determination of moderately polar arsenolipids and mercury speciation in freshwater fish of the river elbe (saxony, germany). | arsenic and mercury are frequent contaminants in the environment and care must be taken to limit their entrance into the food chain. the toxicity of both elements strongly depends upon their speciation. total amounts of as and hg as well as their species were analyzed in muscle and liver of 26 fishes of seven freshwater fish species caught in the river elbe. the median concentrations of as were 162 μg kg(-1) w.w. in liver and 92 μg kg(-1) w.w. in muscle. the median concentrations of total hg wer ... | 2016 | 26552521 |