| myxobolus cultus n. sp. (myxosporea: myxobolidae) in the goldfish carassius auratus transformed from the actinosporean stage in the oligochaete branchiura sowerbyi. | a new myxosporean myxobolus cultus n. sp. was found in experimentally infected goldfish carassius auratus exposed to actinosporean spores from the oligochaete branchiura sowerbyi (tubificidae). at 2-4 mo following initial exposure, spores of m. cultus were observed in the cartilage of goldfish. a lymphocytic infiltrate surrounded the pseudocysts. some pseudocysts were destroyed and spores had been engulfed by phagocytes. phagocytized spores were also found in the epidermis of skin and within mel ... | 1995 | 7776133 |
| combined effects of cadmium and composted manure to aquatic organisms. | to evaluate the interactive toxicity of cadmium (cd) and composted manure to aquatic organisms 96 h static bioassays were conducted in the laboratory with fry of common carp (cyprinus carpio), copepod (diaptomusforbesi) and oligochaete worm (branchiura sowerbyi). five concentrations of composted manure (0, 0.25, 0.5, 1.0 and 6.7 g/l) were prepared from the aquatic weed, pistia stratiotes and each of them was combined with several concentrations of cd to determine 96 h lc-50 values of cd for the ... | 2002 | 11999773 |
| evaluation of a vector-control strategy of haemorrhagic thelohanellosis in carp, caused by thelohanellus hovorkai (myxozoa). | the life cycle of thelohanellus hovorkai (myxozoa), the causative agent of haemorrhagic thelohanellosis of carp cyprinus carpio, involves the alternate oligochaete host branchiura sowerbyi, which plays the role of vector in the parasite's transmission. field investigations in carp farms suggested that oligochaete fauna were closely associated with the substrate type of the pond. the pond bottom in the enzootic farm consisted of clay soil and soft sediments comprised of organic mud, in which b. s ... | 2003 | 12887252 |
| dynamics of experimental production of thelohanellus hovorkai (myxozoa: myxosporea) in fish and oligochaete alternate hosts. | the dynamics of development and production of thelohanellus hovorkai (myxozoa) were examined to investigate factors inducing haemorrhagic thelohanellosis in carp, cyprinus carpio l. fresh actinospores of t. hovorkai were harvested from the oligochaete alternate host, branchiura sowerbyi, and used for infection experiments with myxosporean-free carp. visualization of actinospores by fluorescent labelling revealed that sporoplasms penetrated the gill filaments of carp immersed in an actinospore su ... | 2003 | 14653315 |
| using aquatic macroinvertebrate species traits to build test batteries for sediment toxicity assessment: accounting for the diversity of potential biological responses to toxicants. | an original species-selection method for the building of test batteries is presented. this method is based on the statistical analysis of the biological and ecological trait patterns of species. it has been applied to build a macroinvertebrate test battery for the assessment of sediment toxicity, which efficiently describes the diversity of benthic macroinvertebrate biological responses to toxicants in a large european lowland river. first, 109 potential representatives of benthic communities of ... | 2005 | 16193760 |
| morphological and genetic differences among actinosporean stages of fish-parasitic myxosporeans (myxozoa): difficulties of species identification. | the occurrence and morphology of actinosporean stages of myxosporeans were studied at a fish farm and in the river tisza in hungary. the 43 samples sequenced belonged to 10 'genotypes', from which six were determined as new actinosporean types. based on dna sequence analysis, the assumed actinosporean developmental stages of four myxozoan species were identified. the raabeia type collected from the worm branchiura sowerbyi was identified as myxobolus cultus yokoyama, ogawa & wakabyashi, 1995. th ... | 2006 | 16676228 |
| ecotoxicological effects of jute retting on the survival of two freshwater fish and two invertebrates. | severe deterioration of water quality occurs during jute retting in ponds, canals, floodplain lakes, and other inland water bodies in the rural areas of west bengal in india. attempts were made to evaluate changes in the physicochemical parameters of water caused by jute retting, and their impact on the survival of two species of freshwater fish (labeo rohita and hypophthalmicthys molitrix) and two species of freshwater invertebrate (daphnia magna, a cladocera, and branchiura sowerbyi, an oligoc ... | 2008 | 18157635 |
| benthic macroinvertebrates in the paranapanema reservoir cascade (southeast brazil). | in this study, the composition, specific richness and abundance of benthic macroinvertebrates (<250 microm) from sediments of eight reservoirs of the paranapanema river (southeast brazil), as well as from the main tributaries (taquari, pardo and tibagi) and the mouth zone into the paraná river were analyzed. nineteen points distributed along 700 km were sampled quarterly (8 campaigns) during a two-year period (2000 and 2001). the zoobenthos was characterized by a high species richness, (c.a. 100 ... | 2008 | 19197472 |
| the life cycle of myxobolus lentisuturalis (myxozoa: myxobolidae), from goldfish (carassius auratus auratus), involves a raabeia-type actinospore. | we studied a natural infection of the oligochaete branchiura sowerbyi beddard, 1892 with the raabeia-type actinosporean stage of myxobolus lentisuturalis dyková, fiala et nie, 2002 which infected goldfish carassius auratus auratus (l.) in italy, using molecular analysis of the ssu rrna gene. the existence of intraoligochaete development shows that this parasite follows the life-cycle pattern described by wolf and markiw (1984) for myxobolus cerebralis. histological examinations of the goldfish i ... | 2009 | 19391327 |
| flooding modifies the genotoxic effects of pollution on a worm, a mussel and two fish species from the sava river. | extreme hydrological events, such as water scarcity and flooding, can modify the effect of other stressors present in aquatic environment, which could result in the significant changes in the ecosystem functioning. presence and interaction of various stressors (genotoxic pollutants) in the environment can influence the integrity of dna molecules in aquatic organisms which can be negatively reflected on the individual, population and community levels. therefore, in this study we have investigated ... | 2016 | 25861862 |
| description of a new neoactinomyxum type actinosporean from the oligochaete branchiura sowerbyi beddard. | actinosporean infection of oligochaetes living in the mud of a commercial gibel carp pond with myxosporean disease was studied. six actinospore types were detected exclusively from the oligochaete branchiura sowerbyi beddard with very high prevalence (18%). five out of the six types were identified as the same actinosporeans described in previous reports, the sixth actinosporean was identified as a new neoactinomyxum type and described here based on morphological and molecular characterisation. ... | 2017 | 28062987 |
| kinetics of deposition, acute toxicity and bioaccumulation of copper in some freshwater organisms. | experiments with environmentally relevant concentrations of cu in glass aquaria revealed that cu was quickly removed from water. cubic regression of cu concentration against time showed that maximum rate of removal was around 69.34-72.11 h irrespective of treatment. the 96 h lc50 value of cu was respectively 0.18, 0.19 and 0.35 mg/l for fish cyprinus carpio, crustacean diaptomus forbesi and worm branchiura sowerbyi. normalizing the lethal values and plotting them against time it was observed tha ... | 2016 | 27778046 |
| the life cycle of thelohanellus kitauei (myxozoa: myxosporea) infecting common carp (cyprinus carpio) involves aurantiactinomyxon in branchiura sowerbyi. | thelohanellus kitauei is a freshwater myxosporean parasite causing intestinal giant cystic disease of common carp. to clarify the life cycle of t. kitauei, we investigated the oligochaete populations in china and hungary. this study confirms two distinct aurantiactinomyxon morphotypes (aurantiactinomyxon type 1 and aurantiactinomyxon type 2) from branchiura sowerbyi as developmental stages of the life cycle of t. kitauei. the morphological characteristics and dna sequences of these two types are ... | 2016 | 27492197 |
| [macrobenthic community structure and bioassessment for water quality of banqiao reservoir in huaihe river basin]. | in order to demonstrate macrobenthic community structure dynamics and conduct a biological evaluation of water quality in banqiao reservoir, we collected seasonal samples from january to november 2014 across 15 sampling sites. a total of 17 species belonging to five families, four classes, and 3 phyla were identified, including 8 chironomidae, 4 oligochaeta and 5 mollusc. bellamya aeruginosa, corbicula fluminea, branchiura sowerbyi, pelopia sp. and glyptotendipes sp. were the important species i ... | 2015 | 26785570 |
| morphological and molecular characterization of actinosporeans infecting oligochaete branchiura sowerbyi from chinese carp ponds. | we surveyed the actinosporean stages of fish myxosporeans at fish farms in jiangsu province, china, from 2011 to 2014. during the surveys, we identified 7 actinosporean types from 4 collective groups: echinactinomyxon (1 type), triactinomyxon (1 type), aurantiactinomyxon (1 type), and neoactinomyxum (4 types), released by the oligochaete branchiura sowerbyi. the morphological characteristics and dna sequences of these types are described here. based on 18s rdna sequence analysis, the actinospore ... | 2015 | 26036829 |
| description of raabeia, synactinomyxon and neoactinomyxum developing stages of myxosporeans (myxozoa) infecting isochaetides michaelseni lastočkin (tubificidae) in lake balaton and kis-balaton water reservoir, hungary. | molecular and morphometric investigations were conducted on the actinosporean morphotypes of myxosporeans surveyed in oligochaetes of lake balaton and kis-balaton water reservoir. oligochaetes belonging to the species isochaetides michaelseni lastočkin and branchiura sowerbyi beddard as well as to the genera nais dujardin, dero müller and aeolosoma ehrenberg were studied during an 18-month period. actinosporeans were obtained exclusively from i. michaelseni (7,818 specimens) with very low preval ... | 2014 | 24935127 |
| three actinosporean types (myxozoa) from the oligochaete branchiura sowerbyi in china. | three actinosporean types--raabeia, aurantiactinomyxon, and guyenotia--from the oligochaete branchiura sowerbyi beddard collected from a crucian carp (carassius auratus gibelio) pond are described in this report. compared with the actinospores described previously, the raabeia type presents similar spore shape with the actinospore of myxobolus cultus, except a much longer caudal process, 250.8 μm (217.5-276.3). the aurantiactinomyxon and guyenotia type significantly differ from other actinospore ... | 2013 | 23377120 |
| identification and characterization of one novel type of triactinospomyxon with short spore axis. | this study identifies and characterizes one novel type of triactinospomyxon in oligochaete specimen of branchiura sowerbyi beddard collected from a fish pond used for rearing gibel carp located in caidian experimental station of the institute of hydrobiology. it is nominated as triactinospomyxon caidianensis type. the spore is of characteristic triactinomyxon "anchor" shape and possesses a spore body with sporoplasm containing 32 germ cells, 3 polar capsules, and 3 caudal processes. compared wit ... | 2012 | 22200960 |
| ecotoxicological assessment of cobalt used as supplement in the diet of common carp cyprinus carpio. | experiments were performed in the laboratory to determine if excess levels of co used as dietary supplement (0.0, 0.05, 0.10 and 1.0%) to enhance growth of the fish cyprinus carpio was safe for aquatic organisms. lethal concentrations of co for tadpole of toad bufo melanostictus (96 h lc(50), 17.2 mg/l), oligochaet worm branchiura sowerbyi (96 h lc(50), 179 mg/l) and crustacean zooplankton diaptomus forbesi (96 h lc(50), 1.5 mg/l) were compared with the concentration of co in the medium leached ... | 2011 | 21858707 |
| [ecological characteristics of macrobenthos communities in chaohu basin in spring and their relationships with environmental factors]. | by the method of field investigation in combining with cluster analysis, multi-dimensional scaling analysis and canonical correspondence analysis, and using the indices of shannon, pielou, and margalef, this paper studied the community structure and biodiversity of macrobenthos in the chaohu basin in spring, and their relationships with environmental factors. a total of 23 macrobenthos species were collected, among which, six species (26.1% of total) were annelids, eight species (34.8%) were art ... | 2010 | 21043126 |
| from individual to population level effects of toxicants in the tubicifid branchiura sowerbyi using threshold effect models in a bayesian framework. | effects of zinc were studied in the freshwater worm branchiura sowerbyi using partial and full life-cycle tests. only newborn and juveniles were sensitive to zinc, displaying effects on survival, growth, and age at first brood at environmentally relevant concentrations. threshold effect models were proposed to assess toxic effects on individuals. they were fitted to life-cycle test data using bayesian inference and adequately described life-history trait data in exposed organisms. the daily asym ... | 2010 | 20380436 |
| acute toxicity of synthetic pyrethroid cypermethrin to some freshwater organisms. | ninety-six hours static bioassays were made in the laboratory to determine acute toxicity of cypermethrin to five non-target freshwater organisms belonging to different taxa and niche. susceptibility of the organisms to cypermethrin was in the order: the crustacean diaptomus forbesi > the aquatic insect ranatra filiformis > the freshwater carp cyprinus carpio > the tadpole larva of the toad bufo melanostictus > the oligochaet worm branchiura sowerbyi. ninety-six hours lc50 values of aqueous cype ... | 2008 | 18058051 |
| rearing and estimation of life-cycle parameters of the tubicifid worm branchiura sowerbyi: application to ecotoxicity testing. | this paper provides original collection, acclimatizing, rearing and toxicity test methods for the freshwater worm branchiura sowerbyi, an alternative species to tubifex tubifex for ecotoxicity evaluation of sediments. influence of the substrate, type of food, and feeding level on individual performances was assessed in short-term tests, in order to set up optimal culture and test conditions. low-size particles and high organic matter content favoured the growth and reproduction of b. sowerbyi. t ... | 2007 | 17614123 |
| impacts of quicklime (cao) on the toxicity of copper (cuso4, 5h2o) to fish and fish food organisms. | static bioassays of 96 h duration were conducted in the laboratory using fry of common carp (cyprinus carpio), adult tubificid worm (branchiura sowerbyi) and adult copepod plankton (cyclops viridis) to determine lc50 values of cu and cao to these organisms and effects of interaction between cu and cao. ninety-six hour lc(50) values of cu to fry of common carp, worm and copepod were found to be 1.40 mgl(-1), 0.08 mgl(-1) and 0.03 mgl(-1) respectively. cao up to 500 mgl(-1) did not produce any mor ... | 2005 | 16168741 |
| hungactinomyxon, a new actinosporean type and collective group(myxozoa) from branchiura sowerbyi beddard (oligochaeta). | actinosporeans are characterised by great morphological diversity. as it has been proved that the class actinosporea is a synonym of the myxosporea, actinosporean genera have only been regarded only as actinosporean collective groups. while most actinosporeans are released individually by their oligochaete hosts, members of the synactinomyxon, siedleckiella and antonactinomyxon collective groups are released as eight connected structural elements. these actinosporean types are differentiated by ... | 2005 | 15980964 |
| description of a new actinosporean type from south african freshwaters. | actinospore infection of oligochaetes collected from the mud of 2 freshwater biotopes in south africa was studied. using the 'cell-well plate method', a new aurantiactinomyxon type was found in 1.1% of the examined branchiura sowerbyi oligochaete specimens from the rietvlei river, north of johannesburg, gauteng, south africa. in 1.5% of b. sowerbyi collected in a pond (padda dam), near the rand afrikaans university, johannesburg, the same aurantiactinomyxon type was found. infected oligochaetes ... | 2004 | 15584416 |
| toxicity of methanol to fish, crustacean, oligochaete worm, and aquatic ecosystem. | static renewal bioassays were conducted in the laboratory and in outdoor artificial enclosures to evaluate toxic effects of methanol to one teleost fish and two aquatic invertebrates and to limnological variables of aquatic ecosystem. ninety-six-hour acute toxicity tests revealed cladoceran crustacea moina micrura as the most sensitive to methanol (lc50, 4.82 g/l), followed by freshwater teleost oreochromis mossambicus (lc50, 15.32 g/l) and oligochaete worm branchiura sowerbyi (lc50, 54.89 g/l). ... | 2013 | 15162848 |
| effects of aniline--an aromatic amine to some freshwater organisms. | we determined the acute and chronic toxicity of aniline to tilapia (oreochromis mossambicus), cladoceran crusatcea (moina micrura) and oligochaete worm (branchiura sowerbyi) using static bioassay tests. the 96h lc50 values of aniline for o. mossambicus, m. micrura and b. sowerbyi were 69.4, 0.6 and 586 mg l(-1) respectively. tilapia responded to even low concentrations of aniline: the fish lost appetite at aniline concentrations as low as 0.02 mg l(-1). a 90 d outdoor bioassay with tilapia showe ... | 2003 | 14649422 |
| a comparative study of body wall structures of a pogonophore and an annelid from a phylogenetic viewpoint. | pogonophores are tube worms that live in reducing deep-sea waters where sunlight does not penetrate. they are highly adapted for their special habitat in lacking guts and possessing endosymbiotic chemosynthetic bacteria. because of these peculiar characteristics, it is not yet clear whether they should be classified as annelids or not. electron-microscopic observations of sections of a japanese pogonophore (oligobrachia mashikoi) show that the body wall has circular and longitudinal muscular sys ... | 2002 | 12130799 |
| [community characteristics of benthonic animals and its relationship to environmental factors in the nanhu lake, changchun]. | there are only 21 species of benthonic animals in the nanhu lake, changchun. the dominant species in the benthos community are obvious, and the individual quantity of limnodrilus hoffmeisteri, branchiura sowerbyi, and tendipus plumosus accounts for 87% of the total individual quantity of all benthonic animals. it indicates that the water in the nanhu lake is suffering serious organic pollution, and belongs to an eutrophic lake. the peak values of benthos biomass and energy are found in july(48.2 ... | 2001 | 11757390 |
| first report on the occurrence of an actinosporean stage (myxozoa) in oligochaetes from spanish freshwaters. | oligochaetes living in the mijares river close to the sitjar reservoir, and polychaetes from the brackish and marine waters of a channel flowing into the mediterranean sea, both in the province of castellón (spain), were examined for the presence of actinosporea. an aurantiactinomyxon was isolated from 60 specimens of the oligochaete branchiura sowerbyi collected from the river, but no actinospores were isolated from 160 polychaetes collected from the sea channel. the aurantiactinospores were de ... | 2000 | 11402660 |
| [the benthonic community as bioindicator of altered and recovering zones in toledo creek (uruguay)]. | macrozoobenthos composition and abundance of an organic polluted stream (a. toledo, uruguay) are compared among sites of control (c), degradation (d) and recuperation (r), which were seasonally sampled. water ionic composition, conductivity, ph, temperature and cod were not different among sites, while oxygen, and bod did show significant differences. benthos was more abundant in r mainly due to heleobia spp. oligochaetes were dominant in c and d, with branchiura sowerbyi only in c and limnodril ... | 1996 | 9246372 |
| the lateral giant fibers of the tubificid worm, branchiura sowerbyi: structural and functional asymmetry in a paired interneuronal system. | neuroanatomical and ultrastructural studies of the paired lateral giant nerve fibers (lgfs) in posterior segments of the tubificid worm, branchiura sowerbyi, demonstrate that the fibers are 1) segmental in origin (two cell bodies per segment), 2) joined longitudinally and transversely to form an intersegmental syncytial network, and 3) surrounded by a myelinlike sheath. the lgfs are unique among paired giant fiber systems because of their extreme asymmetry, the diameter of the left fiber being s ... | 1988 | 3170791 |
| toxicity of twenty-three insecticides to a tubificid worm branchiura sowerbyi from the mississippi delta. | | 1973 | 4690301 |
| [the effects of x-rays on the secondary gill formation and the tail regeneration in branchiura sowerbyi. 3. the protective effect of chlorobuthanol against x-irradiation on tail regeneration in branchiura sowerbyi]. | | 1966 | 5232005 |
| [effects of x-irradiation on secondary gill formation and tail regeneration in branchiura sowerbyi (i)]. | | 1964 | 14137078 |