| [parasites of salmo trutta l. from the tirino river. ii. host-parasite interactions of helminth species]. | the hundred and sixteen brown trout (salmo trutta l.) which were examined for helminth parasites were captured in the river tirino, (l'acquila - italy). six parasite species (phyllodistomum simile, crowcrocaecum testiobliquum, crepidostomum metoecus, cyathocephalus truncatus, truttaedacnitis truttae and dentitruncus truttae) were recovered. ecological studies on each helminth species recovered have been carried out analysing the following aspects; the preference of each parasite species for cert ... | 1978 | 553267 |
| [researches on the internal parasites in ephemeroptera around cracovie (author's transl)]. | for the first time, 7 kinds of internal parasites/spiriopsis adipophila, telomyxa glugeiformis, cysts of crepidostomum farionis, cystidicoloides and undetermined species of microsporidia, nematomorpha and gordiacea are encountered in polish ephemeroptera. | 1976 | 820237 |
| growth dynamics and seasonal prevalence of crepidostomum isostomum and phyllodistomum pearsei in aphredoderus sayanus. | a trematode survey of pirate perch, aphredoderus sayanus, in louisiana demonstrated a seasonal periodicity of crepidostomum isostomum with regard to prevalence, worm burden, and maturation. the prevalence of phyllodistomum pearsei showed no discernable periodicity and only the worn development followed a seasonal pattern. | 1976 | 933311 |
| the ecology of crepidostomum species (allocreadiidae: digenea) in the salmonoids of lake yli-kitka in northeastern finland. | crepidostomum spp. were studied from 417 whitefish (coregonus acronius rapp, 1854), 220 vendace (coregonus albula l.) and 38 brown trout (salmo trutta m. lacustris (l.)) from lake yli-kitka in northeastern finland during 1980-1983.12.7% of the whitefish were infected with crepidostomum with a mean intensity of 4.6 worms per infected fish. the species involvedare c. farionis (müller, 1784) and crepidostomum wikgreni gibson et valtonen, 1988, which differed from c. farionis in the number and size ... | 1989 | 2767545 |
| helminths of stocked rainbow trout (salmo gairdneri) with special reference to clinostomum complanatum. | rainbow trout (salmo gairdneri) stocked into a small prairie dug-out were examined for helminths at harvest time. five species of helminths were found (diplostomum sp., diplostomulum scheuringi, clinostomum complanatum, crepidostomum farionis and pomphorhynchus bulbocolli); c. farionis and p. bulbocolli mature in fish while the remaining species utilize fish-eating birds as definitive hosts. examination of stomach contents indicated that all invertebrate hosts required for the life-cycles of the ... | 1988 | 3411701 |
| [helminths in trout (fam. salmonidae) in freshwater reservoirs]. | a survey is made of the helminths parasitizing in representatives of family salmonidae caught mainly in the free fresh-water basins in the country. more detailed information and study concerned the american and the balkan trout--salmo irideus gairdneri and salmo trutta m. fario respectively--because of their higher economic importance. in the course of the study some corrections were made of the names of some of the species in the light of the new data obtained concerning all helminths alreay me ... | 1982 | 7179733 |
| common and rare trout parasites in a small landscape system. | brown trout (salmo trutta) from four lakes within an area of approximately 40 km2 were found to harbour nine helminth species. crepidostomum metoecus could be classified as core species, while crepidostomum farionis had an intermediate position. all the others could be classified as satellite species. salmon (salmo salar) fingerlings were grown to smolts in an earthpond over the summer. the fingerlings became infected with crepidostomum spp. which may indicate a superior colonization ability in ... | 1993 | 8479796 |
| on the distribution and abundance of eel parasites in nova scotia: influence of ph. | the geographic distribution of metazoan parasites of american eels (anguilla rostrata) was determined from 28 sites in the southern upland and adjacent regions of nova scotia. twelve parasite species were encountered. component community diversity as measured by species richness, shannon-wiener index (h') and hill's number (n1) decreased when ph < 5.4. seven species (azygia longa, crepidostomum brevivitellum, bothriocephalus claviceps, proteocephalus macrocephalus, paraquimperia tenerrima, echin ... | 1996 | 8636841 |
| crepidostomum percopsisi n. sp. (digenea: allocreadiidae) from the trout perch (percopsis omiscomaycus) of dauphin lake, canada. | crepidostomum percopsisi n. sp. is described from the small intestine of the trout perch (percopsis omiscomaycus) in dauphin lake, manitoba. it is morphologically similar to crepidostomum isostomum, which has been reported from the trout perch and several other species of fish. it differs from c. isostomum based on the vitellaria confined to the hindbody of the worm, size and shape of the cirrus, size of the testes, and its greater body length. a comparison of our specimens with those illustrate ... | 1997 | 9406794 |
| the contributions of host age and size to the aggregated distribution of parasites in yellow perch, perca flavescens, from garner lake, alberta, canada. | the independent effects of host age and size on parasite abundance are examined in yellow perch from garner lake in east-central alberta. older, larger perch tend to have more species of parasites combined with larger parasite infrapopulations. sexual size dimorphism in perch generates 2 different size classes within each age class >2+ yr, thus allowing the opportunity to separate the effects of age and size on the recruitment of parasites by perch. the abundances of diplostomum adamsi and bothr ... | 1998 | 9488333 |
| the ecology of endoparasitic helminth infections of brown trout (salmo trutta) and rainbow trout (oncorhynchus mykiss) in scotland. | two hundred and forty brown trout (salmo trutta) and 49 rainbow trout (oncorhynchus mykiss), obtained from 21 locations in central scotland between october 1990 and august 1993, were examined for endoparasitic helminth infections. crepidostomum farionis (digenea) was the most widely distributed helminth species, followed by eubothrium crassum (cestoda), diphyllobothrium dendriticum and d. ditremum (cestoda), neoechinorhynchus rutili (acanthocephala), echinorhynchus truttae (acanthocephala), eust ... | 1995 | 9599425 |
| enteric helminths of perch (perca fluviatilis l.) and yellow perch (perca flavescens mitchill): stochastic or predictable assemblages? | component communities of perch (perca fluviatilis l) in eurasia and the north american yellow perch (perca flavescens mitchill) were examined to determine the nature of their parasite communities. the scale of this investigation is continental and includes data collected across the distribution of each host species. data were compiled from the literature and from 5 sample sites in north america. four parasite species were found to occur frequently in the helminth component communities of p. flav ... | 1999 | 10577711 |
| molecular detection of an ehrlichia-like agent in rainbow trout (oncorhynchus mykiss) from northern california. | ehrlichia dna was identified by nested pcr in rainbow trout (oncorhynchus mykiss) collected from a creek in northern california where potomac horse fever is endemic. ehrlichia dna was found in tissues from several organs including the gills, heart, spleen, liver, kidneys and intestine of trout and from three different adult digenetic trematodes (deropegus sp., crepidostomum sp., creptotrema sp.) parasitizing the gallbladder and/or the intestine of the trout. sequencing of pcr-amplified dna from ... | 2000 | 10962157 |
| redescription of crepidostomum opeongoensis caira, 1985 (trematoda: allocreadiidae) from fish hosts hiodon alosoides and hiodon tergisus (osteichthyes: hiodontidae). | crepidostomum opeongoensis caira, 1985 (trematoda: allocreadiidae) is redescribed from fish hosts hiodon alosoides and hiodon tergisus in southern manitoba. the redescription adds details regarding the surface morphology and reproductive structures of the parasite not described previously. these include the characteristic tegumental papillae around the oral opening, paired papillae on the ventral and dorsal surfaces of the body, and tegumental bosses on the dorsal surface of the forebody. crepid ... | 2000 | 11191908 |
| ultrastructure and chaetotaxy of sensory receptors in the cercariae of a species of crepidostomum braun, 1900 and bunodera railliet, 1896 (digenea: allocreadiidae). | previous investigations of cercarial sensory systems have focused on chaetotaxy and ultrastructure of sensory receptors and have revealed chaetotaxic patterns within families, genera, and species as well as different types of sensory receptors. however, chaetotaxic and ultrastructural observations have rarely been combined. we investigated the ultrastructure of cercarial sensory receptors in conjunction with the chaetotaxy and neuromorphology in 2 allocreadiid species belonging to the genera cre ... | 2001 | 11318556 |
| ultrastructure of pigmented photoreceptor of adult crepidostomum metoecus (trematoda: digenea: bunoderidae). | | 2002 | 12194491 |
| external morphological differences between crepidostomum farionis and crepidostomum metoecus (trematoda: allocreadiidae), parasites of salmonids, as revealed by sem. | scanning electron microscopy examinations of trematode specimens belonging to crepidostomum farionis (o.f. muller, 1784) and c. metoecus braun, 1900, collected from brown trout, salmo trutta fario l., in the czech republic, made it possible to study their surface morphology including details not described previously. the tegument of both species bears numerous characteristic papillae around the oral sucker (in c. metoecus also around the ventral sucker) and the ventral and dorsal surfaces of the ... | 2002 | 12418812 |
| ultrastructure of the forebody and foregut tegument and eccrine gland cells of crepidostomum metoecus (trematoda: digenea: allocreadiidae). | the forebody and foregut of crepidostomum metoecus braun, 1900 are invested with a tegument bearing regularly arranged surface tubercles comparable with the aspidogastrean surface structures. the tegument of the ventrolateral lobes and of the prepharynx is penetrated by ducts of eccrine gland cells. the frontal and prepharyngeal gland cells, localised in the parenchyma, discharge electron-dense granules. their ducts are lined by peripheral microtubules and fixed to the tegument plasmalemma by a ... | 2002 | 12641202 |
| [trematoda crepidostomum farionis mueller, 1784 as a parasite of fish in slovakia]. | | 1955 | 13239718 |
| studies on crepidostomum metoecus (braun) and c. farionis (müller), parasitic in salmo trutta l. and s. salar l. in britain. | | 1958 | 13600859 |
| [distribution of two species of crepidostomum braun, 1900 (digenea: allocreadildae) in salmon in rivers of the vistual basin]. | | 1958 | 13604221 |
| crepidostomum illinoiense (trematoda)--its excretory system and miracidium. | | 1963 | 13942732 |
| [the invasion of the gastrointestinal tract of the trout by crepidostomum farionis]. | | 1965 | 14335082 |
| occurrence of two species of crepidostomum in brown trout (salmo trutta l.) from north-east ireland, with special reference to crepidostomum metoecus braun 1900. | | 1955 | 14370843 |
| transmission electron microscopy of intra-tegumental sensory receptors in the forebody of crepidostomum metoecus (digenea: allocreadiidae). | in the adult fish trematode crepidostomum metoecus (braun, 1900), four types of sensory receptors were observed inside the forebody tegument and one type beneath the tegument basal lamina. two types of sensory receptors extend through the thickness of tegument and have a free cilium inside a pit (types i and ii). two types (iii and iv) are nonciliate and entirely intra-tegumental in location. type iv receptor with large horizontal and thin vertical rootlets was described earlier in aspidogastrea ... | 2003 | 14535348 |
| observations on the metazoan parasites of the atlantic salmon (salmo salar) after its reintroduction into the elbe river basin in the czech republic. | in the years 1999-2002, first studies were carried out on the metazoan parasites of atlantic salmon (salmo salar l.) recently reintroduced into the elbe river drainage system, after more than 50 years after the complete extinction of the elbe salmon population. a total of six helminth species were recorded from salmon smolts from three streams of the elbe river basin (kamenice river, jestedský and libocanský brooks) in north bohemia, czech republic, where s. salar fingerlings have been released ... | 2003 | 14971599 |
| transmission electron microscopy of presumed sensory receptors in the forebody papillae of crepidostomum metoecus (digenea: allocreadiidae). | five types of presumed ciliate sensory receptors were detected in the forebody papillae of the adult fish trematode, crepidostomum metoecus (braun, 1900). the cilia are short and submerged in a tegumental pit. the apical bulb part of all types of receptors observed is supported by a dense collar and connected to the tegument basal plasma membrane by a circular septate junction. in sensory receptors types i and iii no rootlet is present; the bulbs of sensory receptors types iii and iv contain an ... | 2004 | 15139374 |
| auriculostoma astyanace n. gen., n. sp. (digenea: allocreadiidae), from the banded astyanax, astyanax fasciatus (characiformes: characidae), from nicaragua, with a reevaluation of neotropical crepidostomum spp. | auriculostoma n. gen. (trematoda: allocreadiidae) is proposed for auriculostoma astyanace n. sp. from the intestine of the characid fish astyanax fasciatus in the atlantic coastal drainages of nicaragua. the new genus differs from all papillose allocreadiid genera, except bunoderella, in possessing 2 pairs of muscular oral papillae (instead of 1 or 3), of which the ventrolateral pair is moderately developed and the dorsolateral papillae are long and auricular. auriculostoma differs from bunodere ... | 2004 | 15562614 |
| functional and phylogenetic components in cercarial nervous systems. | studies involving comparisons of taxa that vary in their degree of relatedness may allow the distinction of functional and phylogenetic components in cercarial sensory systems. in this study, cercariae of allocreadiids bunodera railliet, 1896 and crepidostomum braun, 1900, lecithodendriid allassogonoporus olivier, 1938 and opecoelid allopodocotyle pritchard, 1966 were compared as regards ultrastructure and chaetotaxy of sensory receptors as well as neuromorphology. cercariae were treated with ac ... | 2004 | 15729943 |
| [a preliminary study of parasite diversity in the anadromous kamchatkan mikizha parasalmo mykiss mykiss (osteichthyes: salmoniformes: salmonidae)]. | the study of parasites associated with the anadromous mikizha from several rivers of the western kamchatka has revealed 44 parasite species. the majority of parasites (59%) belong to marine and estuarine-marine species. lecithophyllum bothryophorum, echinorhynchus leidyi and plerocercoids of the family litobothriidae were found for the first time in anadromous fish entering into asian continental watersheds. it has been revealed that only a few specimens of the anadromous mikizha feed in fresh w ... | 2005 | 15810557 |
| systematic position and relationships of paracreptotrematina limi, based on partial sequences of 28s rrna and cytochrome c oxidase subunit 1 genes. | paracreptotrematina limi amin and myer, 1982 (trematoda), an intestinal fluke specific to the mudminnow, umbra limi, is conventionally classified within the papillose allocreadiidae. its unusual morphology (lack of identifiable vitellaria, large fully embryonated terminal eggs), assumptions of homology of its 2 atypical muscular oral 'papillae' (lobes) with those of the bunoderinae, and its unknown life cycle make this classification tenuous. previous phylogenetic analyses of the papillose alloc ... | 2006 | 16729708 |
| the phylogenetic position of allocreadiidae (trematoda: digenea) from partial sequences of the 18s and 28s ribosomal rna genes. | species of allocreadiidae are an important component of the parasite fauna of freshwater vertebrates, particularly fishes, and yet their systematic relationships with other trematodes have not been clarified. partial sequences of the 18s and 28s ribosomal rna genes from 3 representative species of allocreadiidae, i.e., crepidostomum cooperi, bunodera mediovitellata, and polylekithum ictaluri, and from 79 other taxa representing 78 families of trematodes obtained from genbank, were used in a phyl ... | 2007 | 17436963 |
| parasites of juvenile brook trout (salvelinus fontinalis) from hunt creek, michigan. | four parasite species (crepidostomum cooperi, cystidicoloides ephemeridarum, acanthocephalus dirus, salmincola edwardsii) infected 215 juvenile brook trout (105 young-of-year; 110, 1-yr-old) from hunt creek, michigan, in 2003, 2004, and 2005. prevalences of these species in 2004 (main study year) varied from 29 to 37%. crepidostomnum cooperi had the highest mean intensity and mean abundance, followed by c. ephemeridarum. the number of fish infected with each parasite species was significantly hi ... | 2007 | 17539413 |
| the systematic position of wallinia spp. and margotrema spp. (digenea), parasites of middle-american and neotropical freshwater fishes, based on the 28s ribosomal rna gene. | the systematic relationships of aspinose allocreadiid-like digeneans from middle-american and neotropical freshwater fishes, such as wallinia pearse, 1920, margotrema lamothe-argumedo, 1970, magnivitellinum kloss, 1966 and other related genera, remain enigmatic. wallinia (2 spp.) and margotrema (2 spp.) have been placed in the subfamily walliniinae, within the macroderoididae. recent descriptions of species in these genera have followed this classification but have raised questions about their a ... | 2007 | 17587182 |
| ultrastructural study of spermiogenesis and the spermatozoon of crepidostomum metoecus (digenea: allocreadiidae), a parasite of salmo trutta (pisces: teleostei). | spermiogenesis and the spermatozoon of crepidostomum metoecus, an intestinal parasite of brown trout salmo trutta, were studied by transmission electron microscopy. spermiogenesis begins with the formation of a differentiation zone in front of 2 centrioles associated by an intercentriolar body. each centriole is linked to a striated rootlet, and gives rise to a flagellum. the rotation of flagella is greater than 90 degrees; their fusion with the median cytoplasmic extension is proximodistal and ... | 2007 | 17626335 |
| comparative karyological analysis of three members of allocreadiidae (digenea): taxonomic and phylogenetic implications. | chromosome number and morphology were studied in three allocreadiid species from mitotic metaphases of intramolluscan stages using karyometric analysis. bunodera luciopercae has a diploid number 2n=14, with two large pairs of metacentrics, one pair of submeta-subtelocentrics, and four pairs of acrocentrics. karyotype of allocreadium isoporum, 2n=14, with two large pairs of metacentrics and five pairs of acrocentrics was recognized to be closely related to that of b. lucioperca. the most conspicu ... | 2008 | 18612648 |
| parasites of the deepwater sculpin (myoxocephalus thompsonii) across its canadian range. | deepwater sculpin (myoxocephalus thompsonii) were collected from 19 lakes across the species' distribution in canada and examined for parasites. six helminth species (crepidostomum farionis, bothriocephalus cuspidatus, proteocephalus sp., cyathocephalus truncatus, raphidascaris acus, and echinorhynchus salmonis), 1 crustacean species (ergasilus nerkae), and 1 molluscan species (glochidia) parasitized these hosts. crepidostomum farionis, proteocephalus sp., r. acus, e. nerkae, and the glochidia r ... | 2009 | 19382824 |
| [parasites of underyearling kamchatka mykiss parasalmo mykiss mykiss (osteichithyes:salmonidae) in the utkholok river (north-western kamchatka)]. | eight species of parasites, apiosoma piscicolum piscicolum, apatemon sp., diplostomum sp., bunoderidae gen. sp., crepidostomum metoecus, hysterothylacium gadi aduncum, salvelinema salmonicola, and cucullanus truttae had been found in underyearling kamchatka mykiss (with fork length 28-41 mm) from the utkholok river, north-western kamchatka. infestation rate of the fishes with each parasite species was rather low. presence of c. truttae in underyearling kamchatka mykiss could not be explained by ... | 2010 | 21061592 |
| phylogenetic affinities of auriculostoma (digenea: allocreadiidae), with descriptions of two new species from peru. | abstract abstract: two new allocreadiid trematodes are described from the intestine of characid fishes from rio itaya, a tributary of the amazon river near iquitos, peru. auriculostoma foliaceum n. sp. is described from bryconops cf. caudomaculatus (günther, 1864) backup, 2003, and auriculostoma diagonale n. sp. from stethaprion cf. erythrops cope, 1870. auriculostoma foliaceum n. sp. differs from its congeners by having a foliated lateral margin and lacking vitelline follicles in the forebody. ... | 2011 | 21506841 |