scholarly journals The gut microbiota of Cystidicola farionis parasitizing the swim bladder of the nosed charr morph Salvelinus malma complex in Lake Kronotskoe (Kamchatka, Russia)

2021 ◽  
Vol 53 ◽  
pp. 1-15
Author(s):  
E.N. Kashinskaya ◽  
E.P. Simonov ◽  
P.G. Vlasenko ◽  
G.N. Markevich ◽  
A.V. Shokurova ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Swim Bladder ◽  
Salvelinus Malma ◽  
Cystidicola Farionis

Molecular and morphological variation within swim bladder nematodes, Cystidicola spp.

2004 ◽  
Vol 61 (7) ◽  
pp. 1143-1152 ◽  
Author(s):  
Allyson E Miscampbell ◽  
Murray W Lankester ◽  
Martin L Adamson
Keyword(s):  
Parasitic Nematode ◽  
Fish Host ◽  
Valid Species ◽  
Swim Bladder ◽  
Coregonus Clupeaformis ◽  
Rdna Sequences ◽  
Egg Morphology ◽  
Cystidicola Farionis ◽  
Distinct Morphology ◽  
Rdna Analysis

We sequenced four rDNA regions (ITS-1, ITS-2, 5.8S, and D3 region of 28S) from the parasitic nematode Cystidicola spp. from seven species of fish host and 11 locations in Canada and Finland to elucidate suspected unresolved genetic variation within the genus. A holarctic species, Cystidicola farionis from the swim bladder of Salmonidae and Osmeridae, and a nearctic species, Cystidicola stigmatura from trout and char (Salvelinus spp.), differ in life history, host and geographic range, reproductive strategy, and adult and egg morphology. These nematodes were identical at three rDNA regions (ITS-1, 5.8S, and D3); however, two ITS-2 variants were found that differed at four nucleotide positions: variant I (366 bp) was found in British Columbia populations of C. farionis and in C. stigmatura and variant II (369 bp) was found in Ontario and Finnish populations of C. farionis. These results demonstrate that two species with distinct morphology and biology can have identical rDNA sequences, while two morphologically identical isolates have different ITS-2 sequences. Thus, rDNA spacer regions may not be useful for distinguishing biologically valid species or subspecies in some nematode groups. Although phenotypic variation suggested a third undescribed species of Cystidicola from lake whitefish (Coregonus clupeaformis), rDNA analysis did not provide meaningful evidence of its uniqueness.

Host specificity and distribution of the swim-bladder nematodes, Cystidicola farionis Fischer, 1798 and C. cristivomeri White, 1941 (Habronematoidea), in salmonid fishes of Ontario

1980 ◽  
Vol 58 (7) ◽  
pp. 1298-1305 ◽  
Author(s):  
Murray W. Lankester ◽  
John D. Smith
Keyword(s):  
Host Record ◽  
Oncorhynchus Gorbuscha ◽  
Salmo Gairdneri ◽  
Osmerus Mordax ◽  
Swim Bladder ◽  
Coregonus Clupeaformis ◽  
New Host ◽  
New Host Record ◽  
Northwestern Ontario ◽  
Cystidicola Farionis

Cystidicola farionis is reported in Coregonus clupeaformis, C. artedii, C. hoyi, C. nigripinnus (new host record), Prosopium cylindraceum, Oncorhynchus gorbuscha (new North American record), O. kisutch, O. tshawytscha (new host record), Salmo gairdneri, S. trutta, Salvelinus fontinalis, S. namaycush, S. namaycush × S. fontinalis, and Osmerus mordax. The last five fishes listed, however, are considered unsuitable hosts for C. farionis as few, if any, worms reached sexual maturity in these hosts. Coregonus clupeaformis is also unsuitable as a host for C. farionis in lakes Superior and Nipigon. The swim-bladder nematode that matures in lake whitefish in Lake Huron and some inland lakes in northwestern Ontario may be a new species.Factors that may affect the abundance of C. farionis in various fishes are examined and the relative importance of different amphipods as sources of infection is discussed.Cystidicola cristivomeri matures only in hosts of the genus Salvelinus, including S. namaycush and S. alpinus, and is reported here for the first time in S. fontinalis.Ulcerations in the wall of the swim-bladder were seen only in S. gairdneri infected with C. farionis and in S. namaycush infected with C. cristivomeri. The lesions apparently resulted when unusually large numbers of swim-bladder nematodes were present.

scholarly journals Note on the Anatomy of Cystidicola Farionis

Parasitology ◽  
1908 ◽  
Vol 1 (2) ◽  
pp. 193-194 ◽  
Author(s):  
R. T. Leiper
Keyword(s):  
New Genus ◽  
Distinct Type ◽  
Detailed Examination ◽  
Swim Bladder ◽  
Cystidicola Farionis

The nematode worms discovered by Mr Shipley in the swim-bladder of Trout belong to the species Cystidicola farionis, first described by Fischer, and considered by him to represent a new and distinct type in nematode structure for which he proposed the generic name Cystidicola. Later writers refused to accept the new genus and included it in various other groups (see Synonymy, p. 190). In accordance with an old nomenclatural practice the proposed generic name was adopted as the specific name in place of that originally given, thus Cystidicola farionis became, for Rudolphi, Spiroptera cystidicola. From a detailed examination of the various characters of C. farionis I have come to the conclusion that Fischer was correct in creating a new genus for the new forms, and I therefore propose the reinstatement of the abandoned name Cystidicola. It is also in accordance with modern nomenclatural ruling that the original specific name farionis should be adopted in place of cystidicola.

scholarly journals Note on Cystidicola farionis Fischer. A threadworm Parasitic in The Swim-bladder of a Trout

Parasitology ◽  
1908 ◽  
Vol 1 (2) ◽  
pp. 190-192 ◽  
Author(s):  
A. E. Shipley
Keyword(s):  
Swim Bladder ◽  
Cystidicola Farionis

some hundred and ten years ago, Dr Gotthelf Fischer, in a communication dated from Vienna, described a Nematode living in the swim-bladder of the trout. He named this worm Cystidicola farionis and his description is accompanied by some rough cuts. Bosc (1802) re-described the same Nematode under the name Fissula farionis. The same worm was again described by Rudolphi (1819) under the name Spiroptera cystidicola. Dujardin (1845) mentions it under the name Dispharagus cystidicola. Later it was removed by Schneider (1860) from the genus Spiroptera and placed in Diesing's genus Ancyracanthus. von Linstow uses this generic name “with a difference”; he spells it Ancryacanthus.

Development of swim bladder nematodes (Cystidicola spp.) in their intermediate hosts

1979 ◽  
Vol 57 (9) ◽  
pp. 1736-1744 ◽  
Author(s):  
J. D. Smith ◽  
M. W. Lankester
Keyword(s):  
Lake Trout ◽  
Swim Bladder ◽  
Fourth Stage ◽  
Intermediate Hosts ◽  
Mysis Relicta ◽  
The Third ◽  
Gammarus Fasciatus ◽  
Third Stage ◽  
Cystidicola Farionis ◽  
Similar Development

It has been confirmed experimentally that Cystidicola farionis develops to the infective third-stage in amphipods. The third stage was reached more quickly in Gammarus fasciatus (5 weeks) than in Hyalella azteca (6 weeks) at 12–14 °C and required 7 weeks to develop in Pontoporeia affinis at 5–7 °C. Third-stage larvae were 437 μm long immediately after the second moult and grew up to 4.9 mm long. Cystidicola cristivomeri developed to the third stage in Mysis relicta but not in amphipods. Third-stage larvae were about 720 μm long after the second moult and grew up to 5.7 mm long. Third-stage larvae of C. cristivomeri up to 10.8 mm long were found in 0.8% of M. relicta from a lake where lake trout were infected with the parasite. Third-stage larvae of C. farionis and C. cristivomeri grew considerably in the intermediate hosts and the gonads became well developed. Similar development has been reported in other cystidicolids but suggestions that larvae moult to the fourth stage in the intermediate host cannot be accepted.

A Revision of the Genus Cystidicola Fischer, 1798 (Nematoda: Spiruroidea) of the Swim Bladder of Fishes

1969 ◽  
Vol 26 (4) ◽  
pp. 849-864 ◽  
Author(s):  
Ronald C. Ko ◽  
Roy C. Anderson
Keyword(s):  
Geographical Distribution ◽  
Valid Species ◽  
Swim Bladder ◽  
As Species ◽  
The World ◽  
Cystidicola Farionis ◽  
Species Inquirendae

The systematics of the species of the genus Cystidicola Fischer, 1798, parasites of the swim bladder of physostomous fishes, is revised. Cystidicola farionis Fischer, 1798, C. cristivomeri White, 1941, and C. stigmatura (Leidy, 1886) Ward and Magath, 1917, are considered to be the only valid species in the world. These three species are redescribed. Cystidicola farionis is morphologically indistinguishable from C. stigmatura but the two species are tentatively regarded as distinct until more data on their biology are available. Cystidicola brevicauda Fujita, 1939, and C. mesopi Fujita, 1940, are not members of Cystidicola but they cannot be assigned to any other genus. Cystidicola lepisostei Hunter and Bangham, 1933, is a member of Cystidicola but should be regarded as a species inquirendae. Cystidicola minuta Rhodhain and Vuylsteke, 1934, and C. serratus (Wright, 1879) Railliet, 1916, are regarded as species inquirendae of the genus Rhabdochona. The literature on numerous other species assigned at various times to Cystidicola is reviewed. The host and geographical distribution of the valid members of Cystidicola are reviewed.

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