Preferential feeding by the ciliates Chilodonella
and Tetrahymena spp.
Fish are susceptible to parasites, including various species groups which damage the gill tissue, such as Ichthyophthirius multifiliis, Trichodina sp., Chilodonella
sp., Henneguya sp., Dolops sp., Lernaea cyprinacea, Monogeneans, Nematodes, and Ergasilidae (Schalch et al., 2006; Ueda et al., 2013).
claparedei Pr Pl, Bt (Stein, 1867) 11 Chilodonella
B Bt uncinata (Ehrenberg, 1835; Kahl, 1931) 12 Colpoda steini B-D Bt (Maupas, 1883) 13 Litonotus lamella Pr Pf, Bt (Schewiakoff, 1896) Class Polihymenophora 14 Aspidisca costata B Pf, Bt (Dujardin, 1842) 15 A.
Studying the Prevalence of Chilodonella
in Fish Ponds of Sistan Region in Iran.
An example of this parasite is Chilodonella
(i.e., it is a protozoan parasite).
Historically, malachite green has been used effectively against a range of marine parasites such as Gyrodactylus, Dactylogyrus, Ichthyobodo, and Chilodonella
which are all common infections with marine life [14,22,23].
From a total of 27 examined fish, 70.3% (n = 19) were parasitised by at least one parasite species as follows: Ichthyophthirius multifiliis Fouquet, 1876 (Protozoa: Ciliophora), Chilodonella
Strand, 1926 (Protozoa: Ciliophora); Cosmetocleithrum gussevi Kritsky, Thatcher and Boeger, 1986, Cosmetocleithrum confusus Kritsky, Thatcher and Boeger, 1986, Cosmetocleithrum parvum Kritsky, Thatcher and Boeger, 1986 and Cosmetocleithrum sp.
The SSU rDNA sequence showed 99.7% pairwise identity (616 out of 618 bases) with a published DNA sequence from Chilodonella
uncinata (accession number AF300283) and 99.6% pairwise identity with another published C.
Oodinium pilluris (egg) and Chilodonella
sp., which were ectoparasitic, infected the skin, fins, and gills, which are major respiratory organs for young fish.
Animal food organisms such as rotifers (Gastropus, Synchaeta, Trichotria), insect parts, crustaceans, copepods, Protozoans, (Chilodonella
, Loxodes), and fish eggs represented only 3.05 % of the total number of food organism.
Three monogenean species (Gyrodactylus turnbulli Harris 1986;, Gyrodactylus VonNordmann, Dactylogyrus extensus Mueller and Van Cleave 1932); six protozoans (Trichodina Ehrenberg 1831, Chilodonella
Stand, 1928, Ichthyophthirius multifiliis Fouquet, 1876, Piscinoodinium pillulare Schaperclaus 1954, Tetrahymena sp., Epistylis Ehrenberg, 1830.); one digenean (metacercaria of Cryptocotyle Lube,1899.) and two copepod arthropods (Lernaea cyprinacea L.