| development of proteocephalus torulosus in the intermediate host under experimental conditions. | the development of the tapeworm proteocephalus torulosus (batsch, 1786) (cestoda: proteocephalidae), a parasite of cyprinid fish, was studied in the intermediate host under experimental conditions. the eggs of p. torulosus were typified by a relatively small outer envelope (hyaline membrane) and a thick middle layer surrounding the oncosphere. incubation of p. torulosus eggs at different temperatures revealed the ability of some oncospheres to survive and remain infective to the intermediate hos ... | 1993 | 8132977 |
| ecology of proteocephalus torulosus in the blue bream (abramis ballerus) fromthe oder river on the borders of germany and poland | during studies on the ecology of fish helminths, the tapeworm proteocephalus torulosus (batsch, 1786) was frequently found in the intestine of the blue bream (abramis ballerus) from the oder river (germany/poland). in total, 633 fish, ranging between two and 16 years old, were sampled at monthly intervals over a two year period during 1993-1995. statistically significant differences in the seasonal occurrence of the parasite in its fish host were observed. in 1993, the prevalence remained at a h ... | 1998 | 9765375 |
| species of proteocephalus weinland, 1858 (cestoda: proteocephalidae) from cyprinid fishes in north america. | a taxonomic study of proteocephalus species parasitizing cyprinid fishes in north america, namely proteocephalus ptychocheilus faust, 1920 and proteocephalus cobraeformis haderlie, 1953, has demonstrated their conspecificity with proteocephalus torulosus (batsch, 1786), a common parasite of cypriniform fishes (cyprinidae and cobitidae) in the palaearctic region. proteocephalus ptychocheilus and p. cobraeformis are considered junior synonyms of p. torulosus. | 1999 | 10207386 |
| 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 |
| ultrastructure of the spermatozoon of the proteocephalidean cestode proteocephalus torulosus (batsch, 1786). | the fine structure of the mature spermatozoon of the proteocephalidean tapeworm proteocephalus torulosus, a parasite of cyprinid fishes, was studied by transmission electron microscopy for the first time. the mature spermatozoon of p. torulosus is filiform and tapered at both extremities. it contains two axonemes of the 9+"1" type and of unequal length. the anterior extremity of the spermatozoon bears a helicoidal crested body approximately 100 nm thick. cortical microtubules of two types lie pa ... | 2003 | 12632144 |
| spermiogenesis in the proteocephalidean cestode proteocephalus torulosus (batsch, 1786). | spermiogenesis of the proteocephalidean cestode proteocephalus torulosus (batsch, 1786) was examined for the first time using transmission electron microscopy. spermiogenesis begins with the formation of a distal cytoplasmic protrusion, a differentiation zone, at the periphery of the early spermatid. this differentiation zone is lined with cortical microtubules and contains two centrioles aligned along the same axis. subsequently, each centriole is associated with the striated root and the inter ... | 2003 | 12684888 |
| [variability and phenotypic structure of proteocephalus torulosus (cestoda: proteocephalidea)--a parasite of cyprinid fishes]. | variability of 5 qualitative features of proteocephalus torulosus from 6 fish species belonging to 5 genera of the subfamily leuciscinae was studied. itraspecific diversity is represented by 3 scolex forms, 2 types of proglottid structure, 3 proglottid shapes, and 2 variations of the female reproductive system characteristics. the parasite living in different host species form separate ecological forms differing in the number of phenotypes and their ratio. however, the same scolex and strobila p ... | 2004 | 15174393 |
| ultrastructure of the apical glandular region of the scolex of proteocephalus torulosus (cestoda: proteocephalidae). | in the apical glandular region of the adult proteocephalus torulosus (batsch, 1786), two types of eccrine gland cells are present. the first type of unicellular gland produces large electron-dense granules of various sizes. the second type contains small electron-dense granules. most cells form glands with large granules; glands with small granules are infrequent. the secretion of both types of gland cells is concentrated in the apical parts of the cyton and in the ducts opening to the exterior. ... | 2004 | 15729946 |
| [an investigation of parasites of tench (tinca tinca l., 1758) in beyşehir lake]. | the aim of this study that was carried out from march 15, 2003 to february15, 2005 was to determine the parasites of tench (tinca tinca l., 1758) inhabiting the beyşehir lake. during the study, a total of 334 tenches (t. tinca ) were caught in different regions of beyşehir lake monthly and investigated parasitologically. endoparasites in tenches were found to be plerocercoids of ligula intestinalis, caryophyllaeus laticeps, bothriocephalus acheilognathi and proteocephalus torulosus from cestoda, ... | 2006 | 17309041 |
| effects of a chemically polluted discharge on the relationship between fecundity and parasitic infections in the chub (leuciscus cephalus) from a river in southern england. | in fish there is a close association between endocrine and immune function that during seasonal changes in reproductive status can affect the fishes susceptibility to parasitic infection. the effects of endocrine-disrupting pollution on this association are not known. the present study investigates the effects of a chemically polluted (ammoniacal nitrogen, zinc, bromide) discharge in cranleigh waters, a river in southern england, on the fecundity and parasitism of chub, leuciscus cephalus, over ... | 2010 | 19756842 |
| [The Seasonal Distribution and Effect of Tench Fish (Tinca tinca L., 1758) Helminthes Parasites Living in Terkos Lake]. | Objective: The aim of this study, carried out from August, 2009 to July, 2010, was to determine the seasonal distribution of tench fish (Tinca tinca L. 1758) helminthes inhabiting the Terkos lake. Methods: Living fish gathered from the study area were brought into the laboratory. The species analysis done by ecto and endo parasites of the fish were investigated. Results: During the study, a total of 165 tenches (T. tinca) were investigated. Endoparasites in tenches were f ... | 2011 | 22203507 |
| [morphological variability and the structure of pre-reproductive age group of the cestode proteocephalus torulosus from altai osman (oreoleuciscus, cyprinidae) in water bodies of mongolia]. | morphological variability of immature proteocephalus torulosus was studied for the first time. on the basis of scolex shape, three phenotypes were distinguished: clavate, rounded, and lanceolate. the clavate phenotype was found to be dominant, the rounded one is small in number, and the lanceolate one is rare. the wide ranges of morphometric variability were established. the clavate phenotype differs from the rounded one by its higher variability. the high morphologic variability of immature p. ... | 2014 | 25508372 |
| [morphological variability and the structure of pre-reproductive age group of the cestode proteocephalus torulosus from altai osman (oreoleuciscus, cyprinidae) in water bodies of mongolia]. | morphological variability of immature proteocephalus torulosus was studied for the first time. on the basis of scolex shape, three phenotypes were distinguished: clavate, rounded, and lanceolate. the clavate phenotype was found to be dominant, the rounded one is small in number, and the lanceolate one is rare. the wide ranges of morphometric variability were established. the clavate phenotype differs from the rounded one by its higher variability. the high morphologic variability of immature p. ... | 2014 | 25464741 |