| phylogenetic analysis of european species of proteocephalus (cestoda: proteocephalidea): compatibility of molecular and morphological data, and parasite-host coevolution. | the phylogeny of european species of the tapeworm genus proteocephalus was studied, based on partial 18s rdna and morphological data. the group was found to be monophyletic. the analysis showed a low informative value of available morphological characters in comparison with molecular data. the morphological matrix resulted in a poorly resolved tree which is, however, compatible with the topology (proteocephalus osculatus (proteocephalus torulosus (proteocephalus macrocephalus, proteocephalus fil ... | 2001 | 11429177 |
| common sculpin cottus gobio as a natural paratenic host of proteocephalus longicollis (cestoda: proteocephalidae), a parasite of salmonids, in europe. | common sculpins cottus gobio l. (pisces: cottidae), from the mlýnský brook near ceské zleby in the sumava national park, southwestern bohemia, czech republic, were found to harbour in their intestines juvenile cestodes proteocephalus longicollis (zeder, 1800), a common parasite of holarctic salmonids, with a prevalence of 60% and intensity of 1 to 11 (mean 5) parasites per fish; undoubtedly, these prey fish serve as paratenic hosts. in this locality, the definitive host of p. longicollis is the ... | 2001 | 11463104 |
| [polymorphism and structure of the population of proteocephalus longicollis zeder, 1800 (cestoda: proteocephalidae) in the vendace coregonus albula l]. | polymorphism and phenotypic diversity of a hostal ecoform of proteocephalus longicollis from its typical host, the vendace, coregonus albula l., were studied. a complex phenotypic structure of the parasite population and presence of morphologically different groupings were revealed. we distinguished four groupings based on the external characters and three groupings based on the feed and reproduction features; among latter groupings one has very specific variations of features. we conclude that ... | 2004 | 15553773 |
| [parasite fauna of the european river lamprey lampetra fluviatilis (l.) from lake onega]. | data on the parasite fauna of the adult european river lamprey lampetra fluviatilis (l.) from lake onega are reported. ten parasite species are found, including trematodes diplostomum petromyzifluviatilis and d. spathaceum (metacercariae), cestode proteocephalus longicollis, nematodes cucullanus truttae and raphidascaris acus, acanthocephalan echinorhynchus salmonis, ectoparasitic infusoria chilodonella hexastica, trichodina tenuidens, and trichodinella epizootica, and fungus saprolegnia parasit ... | 2007 | 17957959 |
| estimation of the endohelminth parasite species richness in freshwater fishes from la mintzita reservoir, michoacán, mexico. | in total, 9 endohelminth species were found to parasitize 7 fish species (2 cyprinids, 4 goodeids, and 1 poeciilid) from la mintzita reservoir, michoacán, in central mexico; 5 were larvae, including 3 allogenic species (clinostomum complanatum, tylodelphys sp., posthodiplostomum minimum) and 2 autogenic species (serpinema trispinosum, spiroxys sp.). four were enteric autogenic adults, i.e., margotrema bravoae, bothriocephalus acheilognathi, proteocephalus longicollis, and rhabdochona lichtenfels ... | 2008 | 18372653 |
| [morphological variability and population structure of the cestode proteocephalus longicollis (zeder, 1800) in aquaculture]. | morphological variability of the cestode proteocephalus longicollis (zeder, 1800) from coregonus peled (gmelin, 1789) was studied in natural host population from the pelyadka river and in aquaculture from the kuchak lake. variability of morphometric characters of the parasite is recorded. sample from the kuchak lake differs from the sample collected in the pelyadka river by a greater number of testes, larger size of worms, smaller size of cirrus bursa and smaller ratio of the cirrus bursa length ... | 2012 | 23458018 |
| [microevolutionary aspects of morphological variability and specificity of cestodes by the example of proteocephalus longicollis (zeder, 1800) (proteocephalidae), a parasite of coregonids]. | morphological variability of the cestode proteocephalus longicollis from the smelt osmerus eperlanus l., which was spontaneously introduced into the syamozero lake, has been studied. it was established that p. longicollis became an abundant element of the smelt parasite fauna during last 20 years, thereby showing the absence of host specificity. it was revealed that morphological polymorphism of p. longicollis from smelt combines features of ecological forms characteristic for aboriginal host sp ... | 2010 | 20795485 |
| seasonal occurrence of the tapeworm proteocephalus longicollis and its transmission from copepod intermediate host to fish. | seasonal occurrence in terms of prevalence, intensity of infection, abundance and density of the tapeworm proteocephalus longicollis (zeder, 1800) and its transmission between its intermediate host (cyclops abyssorum prealpinus) and definitive host (common whitefish, coregonus lavaretus) in lake annecy, an oligotrophic lake in the western part of the alps, france, were studied in the period of 1998-2000. a copepod cyclops abyssorum prealpinus (kiefer, 1939), the dominant species among planktonic ... | 2003 | 12910414 |
| species of proteocephalus weinland, 1858 (cestoda: proteocephalidae), parasites of coregonid and salmonid fishes from north america: taxonomic reappraisal. | a taxonomic study of species of proteocephalus weinland, 1858 (cestoda: proteocephalidae), from coregonid and salmonid fishes in north america, based largely on their type specimens, was carried out. none of the taxa studied possesses obvious autapomorphies that would justify its validity. on the contrary, all species share the following diagnostic features typical of proteocephalus longicollis (zeder, 1800) (syn. proteocephalus exiguus la rue, 1911), a polymorphic and widely distributed parasit ... | 1999 | 10207371 |
| [parasites fauna of the lake kronotskoe charrs (salvelinus), kamchatka]. | the new data on the parasites fauna of the lake kronotskoe sympatric charr forms (genus salvelinus (nilsson) richardson, 1836) is presented. parasites fauna of bigmouth and smallmouth charr forms are described for the first time. the information about longhead charr, nosed charr and white charr parasites is added. 29 species of parasites from 9 classes were found: oligohymenophorea, myxosporea, monogenea, trematoda, cestoda, nematoda, acantocephala, crustacea and hirudinea. longhead charr was th ... | 2017 | 29215222 |
| [number distribution and population structure of proteocephalus longicollis (zeder, 1800) (cestoda: proteocephalidea), a parasite of smelt and coregonids]. | the spatial structure and seasonal aspects in the number distribution of the cestode proteocephalus longicollis population, maintained by trophic connections of specialized plankton-feeders (the vendace coregonus albula l. and the smelt osmerus eperlanus l.) in the lake onego were studied. differences in the distribution of number of cestode population in host population, size-age structure, and pre-reproductive/reproductive stages ratio of the studied parasites were revealed. it was demonstrate ... | 2017 | 29211418 |
| ultrastructure of the early embryonic stages of corallobothrium fimbriatum (cestoda: proteocephalidea). | cellular details of early embryogenesis have been studied extensively among cyclophyllidean cestodes, but have been reported for only 2 species of the order proteocephalidea, both belonging to the genus proteocephalus. thus, we performed a detailed ultrastructural analysis of early embryos of a second species, corallobothrium fimbriatum, including early events in the formation of the embryonic envelopes. adult worms were collected from the small intestine of brown bullhead catfish, ameiurus nebu ... | 2010 | 20465318 |
| [the role of paratenic hosts in the life cycles of helminths]. | paratenic hosts, especially of nematodes, play a major role in spreading many parasite species. the phenomenon of "paratenic parasitism" is illustrated by examples of development of syngamus trachea and proteocephalus longicollis. moravec introduced a concept of "natural paratenic host" for p. longicollis infecting common sculpion, cottus gobio, in europe. according to kennedy, paratenic host richness of anguillicola crassus is an adaptation to new environmental conditions. new studies, involvin ... | 2008 | 19338219 |
| [populational variability of proteocephalus longicollis (cestoda: proteocephalidae) in the vendace coregonus albula from lakes of karelia]. | populational variability of proteocephalus longicollis from the vendace inhabiting various types of karelian water bodies was studied. high phenotypic diversity of the helminth and polymorphism in the cestode's major functional complexes - attachment, trophic and reproduction - are established. high degree of phenotype pool realization was determined for various p. longicollis populations. traits belonging to different functional complexes were shown to have different variability patterns. the h ... | 2008 | 18543801 |
| [successional features of the dynamics of abundance and population structure of the cestode proteocephalus longicollis (zeder, 1800) (cestoda: proteocephalidae)]. | dynamics of abundance and changes of populations structure were investigated in a host-specific parasite of salmonids, cestode proteocephalus longicollis from the vendace coregonus albula l. of the syamozero lake during the period of more than forty years. a relative stability of the values of infestation indices independently of significant changes in the abundance and population structure of the vendace is established. changes in the distribution of abundance and population structure of p. lon ... | 2007 | 18411651 |
| [parasites-invaders of the volga river basin: history of invasion, perspective of dispersion, possibility of epizootic]. | the fauna of fish parasites in the volga river increased by 15 species in last time. these parasites have invaded together with introduced hosts or dispersed after destruction of some physical and ecological barriers. the infusoria ambiphrya ameuri, cestode cestobothrium acheilognathi, trematodes amurotrema dombrovskajae and sanguinicola skrabini have been introduced together with their hosts. a creation of water reservoirs destroyed ecological barriers and created favorable conditions for the m ... | 2001 | 11558337 |
| ultrastructure studies of preadult proteocephalus longicollis (cestoda, proteocephalidea): transmission electron microscopy of scolex sensory receptors. | the ultrastructure of five types of presumed sensory receptors in the scolex of preadults of proteocephalus longicollis is described. two types of nonciliate sensory receptors are situated on the inner surface of the lateral sucker. they differ from each other in the shape, presence, or absence of a large rootlet, electron-dense collars, desmosomes, microtubules, and/or vesicles. in addition, three types of ciliate sensory receptors are found along the edges of the lateral suckers. they can be d ... | 2000 | 10685838 |
| ultrastructure studies of proteocephalus longicollis (cestoda, proteocephalidea): transmission electron microscopy of scolex glands. | the ultrastructure of two types of secretory glands in the scolex of preadults of proteocephalus longicollis is described for the first time in the present report. the gland cells contain extensive cisternae of granular endoplasmic reticulum and golgi complexes, which participate in the production of secretory globules. type i scolex glands produce electron-dense globules of various size. the secretory globules enter the secretory canal, openings of which were not observed in the preadults. the ... | 2000 | 11002978 |
| reinvestigation of the spermatozoon ultrastructure of the cestode proteocephalus longicollis (zeder, 1800), a parasite of salmonid fish. | the reinvestigation of the fine structure of the mature spermatozoon of the proteocephalidean tapeworm proteocephalus longicollis, a parasite of salmonid fish, has shown new characters not described previously for this species. they include a helicoidal crested body, 60-100 nm thick and localised at the anterior extremity of the spermatozoon. also new is the finding that cortical microtubules in p. longicollis spermatozoon are of two types. the nucleus situated in the middle part of the gamete i ... | 2003 | 13680377 |
| reinvestigation of spermiogenesis in the proteocephalidean cestode proteocephalus longicollis (zeder, 1800). | the reinvestigation of spermiogenesis in the proteocephalidean cestode proteocephalus longicollis (zeder, 1800) provides new details that were not described previously for this species. the 2 centrioles with roots are oriented at the first tangential to the long axis of the nucleus in a differentiation zone. they come to be arranged in the same plane only when a single intercentriolar body (icb) appears between them. the icb had been described previously as consisting of a number of dense elemen ... | 2004 | 15040663 |
| [specific features of the numbers and structure of the population of proteocephalus longicollis (zeder 1800) (cestoda: proteocephalidea)--a mass parasite of whitefish coregonus lavaretus l. under conditions of technogenic pollution of the water body]. | the numbers, age structure, and morphological variation of the cestode proteocephalus longicollis from whitefish of a natural water body (kamennoe lake) and those of kostomuksha lake polluted with wastes of the mining industry (northern karelia) have been studied. in the polluted water body, a high infestation of whitefish and domination of larval stages in the structure of the parasite population have been established. it is shown that under conditions of pollution, only one of the variations o ... | 2016 | 22988762 |
| [morphological polymorphism of the cestode proteocephalus longicollis zeder, 1800 (cestoda: proteocephalidae) through the ontogeny]. | the qualitative diversity of proteocephalus longicollis through the ontogeny was studied: procercoids from copepods, immature and mature cestodes from the vendace coregonus albula l. the structure of the p. longicollis population was found to be made up of the dominant phenotypes: by the scolex shape--sc2, by the sucker arrangement type--si, by the proglottid shape--p3, by the ovary lobe shape--01, by the testes arrangement type -t2. some rare and scant phenotypes are also present. it is shown t ... | 2007 | 17578243 |