Trichodina gobii (Ciliophora: Trichodinidae) on whiting Merlangius merlangus with a checklist from Turkish and Russian coasts of the Black Sea

Abstract

Trichodina gobii was identified during a parasitological survey conducted on the parasite fauna of whiting, Merlangius merlangus at both Sinop (Turkey) and Sevastopol (Russia) coasts of the Black Sea in the period between May 2011 and March 2014. Its morphological characteristics and taxonomic affinities with other previous reports on this species were revealed. The ecological occurrences in relation with seasonality, host length and sex of whiting were also determined. Parasitological indices were calculated from 690 and 423 whiting specimens collected in Sinop and Sevastopol, respectively. Overall infestation prevalence (%) and mean intensity and mean abundance values were 45.6%, 70.1±10.4 and 32.0±4.9, respectively, in Sinop, while they were 6.9%, 29.2±10.1 and 2.0±0.8 in Sevastopol. The taxonomic affinities to other trichodinid species and ecological data are discussed in detail.

Trichodinidae in commercial fish in South America

“…The methods for quantifying trichodinids are based on direct or indirect counting. In direct evaluations, the total number of parasites is counted, either from mucus smears from the body surface of each host, prepared on glass slides (Jerônimo et al 2012;Zago et al 2014;Ikefuti et al 2015;Ö zer et al 2015) or the number on one side of the host's body (Madsen et al 2000). To analyze the gills, the arches are collected and placed between a slide and cover slip (Jerônimo et al 2012;Ikefuti et al 2015).…”

“…The fresh material can be analyzed under an ordinary optical microscope after drying at room temperature (Valladão et al 2013;Valladão et al 2016a) or after fixing in 70% alcohol (Zago et al 2014). In fresh preparations, the high mobility of the parasites, the cilia and the bell or circular shape can be observed, depending on the position of the parasite (Noga 2010;Ö zer et al 2015).…”

“…Seasonality has an influence on the occurrence of trichodinids in fish in countries with temperate and cold climates because spring and winter are the seasons that are more favorable for multiplication of these ciliates (Hossain et al 2008;Abdel-Baki et al 2011;Yemmen et al 2011;Ö zer et al 2015). In Brazil, a large country, there is no pattern of seasonal occurrences given the regional differences in temperature and rainfall levels.…”

Epizootiology of the ectoparasitic protozoans Ichthyobodo salmonis and Trichodina truttae on wild chum salmon Oncorhynchus keta

“…are affected by several environmental factors, such as changes in temperature (Nilsen 1995, Schisler et al 1999, Kristmundsson et al 2006, Yemmen et al 2010, water flow (Schisler et al 1999), water quality (Nnadi et al 2011), fish population density (Kristmundsson et al 2006), and seasonality (Özer 2000(Özer , 2003(Özer , Balta et al 2008(Özer , Özer et al 2015. Any of these factors may have caused time-or location-dependent variations in the infestation prevalence or intensity of T. truttae on the freshwater-adapted adult and juvenile wild chum salmon in the present study.…”

Recording of Two Species of the Genus Dipartiella (Raabe, 1959) Stein, 1961 (Cliophora: Trichodinidae) for the First Time in Iraq From Gills of the Common Carp Cyprinus Carpio

“…The morphology of the denticles in the adhesive disc has been widely used in species identification of trichodinids (Van As and Basson , 1992. More than 300 trichodinid ciliophoran species, representing 11 genera have been reported from the gills, skin, fins, urinary bladder as well as reproductive system of different fish species in the world (Asmat, 2014;Özer et al, 2015). Among the genera of Trichodinidae the genus Dipartiella (Raabe, 1959) Stein, 1961.…”