| segregation and co-occurrence of larval cestodes in freshwater fishes in the bothnian bay, finland. | two autogenic (triaenophorus crassus and t. nodulosus) and four allogenic (diphyllobothrium latum, d. dendriticum, d. ditremum and schistocephalus solidus) larval cestode species were found in 13 out of 31 fish species studied from the bothnian bay, ne baltic. gasterosteus aculeatus was the most heavily infected fish with 4 larval cestode species; for two of them (d. ditremum and s. solidus) the three-spined stickleback was found to be the required fish intermediate host. among allogenic cestode ... | 1992 | 1614732 |
| [the causes of the formation of an intensive focus of triaenophoriasis in the upper tuloma river reservoir]. | observations on the triaenophorus crassus invasion in coregonus lavaretus and esox lucius were carried out in the period of 1984 to 1989 in the upper tuloma river [correction of verkhnetulomsk] water reservoir and pechozero water body (the pecha river) which form a common basin. significant differences were noted in the infection rate of fishes with this parasite in the above water bodies. in pechozero, where there are preserved natural conditions and therefore an ecological equilibrium in the h ... | 1991 | 1839932 |
| [a population analysis of the variability of the hooklets in the cestode triaenophorus crassus]. | the paper presents data on the variability of attachment organs in the cestode triaenophorus crassus, a parasite of freshwater fishes. the greatest range of variability of all the characters is typical of whitefish, a fish with a long life cycle, while the shortest one is characteristic of vendace and young of trout. it is suggested that the stay of the parasite in fishes, associated with host age, is accompanied by the increase in average sizes of hooks and variability range. such an approach t ... | 1989 | 2530490 |
| helminth position within the intestine of naturally infected pike (esox lucius) relative to host stomach contents. | the positions of 3 cestode species, triaenophorus crassus forel, triaenophorus nodulosus (pallas), and proteocephalus pinguis larue, and a nematode, raphidascaris acus (bloch), within the intestine of naturally infected pike (esox lucius l.) were evaluated with respect to the presence or absence and state of digestion of host stomach contents. the positions of scolices and strobilae of the cestodes did not vary with respect to host stomach contents. by contrast, r. acus was anterior (near the st ... | 1989 | 2614600 |
| [the dependence of parasites on external factors--demonstrated by coregonus infected with triaenophorus crassus (cestoidea, pseudophyllidea)]. | | 1966 | 6010420 |
| experimental infections of rainbow trout, salmo gairdneri richardson, with plerocercoids of triaenophorus crassus forel. | this study concerned the suitability of rainbow trout as an experimental host for plerocercoids of triaenophorus crassus. twenty-five trout were exposed to cyclops bicuspidatus thomasi infected with procercoids of t. crassus. plerocercoids were recovered from 11 of these fish. hemorrhaging in the muscle was the first evidence of infection in live fish between days 22-58 postinfection (pi). migration of worms created extensive lesions in the muscle by day 30 pi followed by formation of granulomas ... | 1984 | 6716558 |
| [effect of hydraulic structures and water storage basins on the parasitic fauna of the atlantic salmon (salmo salar)]. | 157 specimens of salmo salar l. belonging to different age groups were examined in the region of the lower-tuloma hydropower-station. 13 species of parasites (of them 5 are freshwater) were found in anadromous migrants. the character of the parasite fauna and the structure of fishes' scale have shown that some salmons cannot get the fishrunning over and stay in summer months under the damb where become infected with freshwater parasites. 19 species of parasites (of them 14 are freshwater) were f ... | 1980 | 7375139 |
| the influence of food competition and host specificity on the transmission of triaenophorus crassus (cestoda) and cystidicola farionis (nematoda) to coregonus lavaretus and coregonus albula (pisces:coregonidae) in finland. | as a superior competitor for planktonic food, vendace (coregonus albula), when abundant, is expected to displace whitefish (coregonus lavaretus) from feeding on plankton and to force it to rely more on benthic food. the predicted result would be a reduced abundance of the copepod-transmitted cestode triaenophorus crassus in whitefish, but an increase in the abundance of the nematode cystidicola farionis transmitted via benthic amphipods. we studied the occurrence of both parasites in whitefish d ... | 1999 | 10616921 |
| factors affecting abundance of triaenophorus infection in cyclops strenuus, and parasite-induced changes in host fitness. | factors affecting the abundance of triaenophorus crassus and triaenophorus nodulosus procercoids in their copepod first intermediate host, cyclops strenuus, and effects of infection on feeding behaviour, reproduction and survival of the host were studied experimentally. when exposed to the same number of coracidia, copepods harboured considerably less procercoids in the trials where ciliates or artemia salina nauplii were given as alternative food items. the prevalence of infection was higher in ... | 1999 | 10616925 |
| effect of triaenophorus crassus (cestoda) infection on behavior and susceptibility to predation of the first intermediate host cyclops strenuus (copepoda). | some parasites have been shown to manipulate host behavior so that parasite transmission to the next host is enhanced. infection with triaenophorus crassus forel (cestoda) caused alterations in the activity and microhabitat selection of the first intermediate host cyclops strenuus fischer (copepoda) in the laboratory. infected copepods made more starts to swim but spent less time swimming than uninfected copepods. these changes were independent of the intensity of infection. in a water column il ... | 2000 | 10958437 |
| circulation of parasites among fishes from lakes in the caribou mountains, alberta, canada. | circulation of 24 macroparasite species among 12 species of fish was evaluated within samples of hosts collected from 9 lakes on an isolated plateau in northern alberta, canada. twenty-seven parasite taxa (24 species plus the larval stages of triaenophorus crassus, t. stizostedionis, and raphidascaris acus) had the potential to be circulated among hosts. sixteen parasite taxa were recovered from a single host species within a lake. of the 11 remaining nonspecialist taxa, 4 were larval stages tha ... | 2003 | 12760632 |
| an experiment in the control of the cestode, triaenophorus crassus forel. | | 1946 | 20279657 |
| 'global worming': first record of an epidemic of triaenophorus crassus in a population of arctic charr salvelinus umbla. | in may 2005, an epidemic of the cestode triaenophorus crassus occurred in the salvelinus umbla population of lake grundlsee, an oligotrophic austrian alpine lake. based on catches with a standardized multi-mesh gillnet survey 53% of s. umbla were infected with up to 17 cysts of t. crassus per fish. this is the first documented record of an epidemic of this tapeworm in s. umbla. | 2009 | 20735611 |
| [an example of anthropogeneous succession in the ecosystem of the verkhnetulomsky water reservoir (the tuloma river basin, the kola region)]. | the destruction of initial biocenoses in the ecosystem of the verkhnetulomsky water reservoir caused deep succession processes. as a result of the loss of the amphipod group in the benthos, replacement of the trophic links in fishes took place in the biocenosis of the reservoir. benthos feeders changed over to the feeding on zooplankton and, as a result, became the constituent of the predators'diet. the structure of parasitic systems has changed. the parasites using amphipods as intermediate hos ... | 2010 | 21061595 |
| differential diagnosis of triaenophorus crassus and t. nodulosus experimental infection in cyclops abyssorum praealpinus (copepoda) from the alpine lake grundlsee (austria) using pcr-rflp. | in 2005, an epidemic of the cestode triaenophorus crassus in arctic charr, salvelinus umbla from lake grundlsee (austria) was reported, resulting in the closure of the local fisheries. the parasite uses a copepod and a salmonid fish as intermediate hosts, and the european pike (esox lucius) as definitive host. in lake grundlsee procercoids of t. crassus, t. nodulosus and eubothrium salvelini use the copepod cyclops abyssorum praealpinus as their first intermediate host. we report on the developm ... | 2011 | 21424806 |
| occurrence and intensity of parasites in wels catfish, silurus glanis l. 1758 from amirkelayeh wetland, southwest of the caspian sea. | amirkelayeh international wetland with a surface area of 1,230 hectares and fifteen fish species is an important water resource in the southern part of the caspian sea. there is few reports on fish parasites of this area. in the present study, a total of 80 wels catfish, silurus glanis, were collected from april through july 2011. after recording biometric characteristics, common necropsy and parasitology methods were used. in the present study, a total of 441 individuals of seven parasite speci ... | 2016 | 27605796 |
| infection levels of plerocercoids of the tapeworm triaenophorus crassus and feeding strategy in two fish species from the ultra-oligotrophic lake achensee, austria. | thus far, high burdens of triaenophorus crassus plerocercoids have been reported only in old age groups of coregonid and salmonid fishes. here we show heavy infection with t. crassus in young whitefish coregonus lavaretus in the ultra-oligotrophic and regulated achensee in tyrol, austria. prevalence of t. crassus on c. lavaretus was 100% in all age groups and abundance significantly increased with fish age. the mean annual accumulation of t. crassus was 5.2 parasites in 0- to 7-year-old c. lavar ... | 2016 | 25345803 |