The Nature Protection Aspect of the Black Sea Fish Myxosporean Studies

Abstract

The Nature Protection Aspect of the Black Sea Fish Myxosporean (Myxozoa, Myxosporea) Studies. Yurakhno V. M. -The species composition and indices of the myxosporeans infecting fish from the different nature conservation Black Sea regions were considered on the base of the original investigations and literature data. Myxosporean inhabiting the Red Book fish hosts were investigated. The myxosporean species potentially pathogenic for the fish health were identified and epizootological situation was estimated.

Phylogeny and comprehensive revision of mugiliform-infecting myxobolids (Myxozoa, Myxobolidae), with the morphological and molecular redescription of the cryptic speciesMyxobolus exiguus

“…Overall, about 38 species and four records of Myxobolus have been performed from mugiliform fish hosts worldwide (Table 3; Naidenova et al ., 1975; Donets, 1979; Ibragimov, 1987; Yurakhno and Maltsev, 2002; Yurakhno, 2004; Eiras et al ., 2007, 2014), with C. ramada being host to M. exiguus and M. muelleri (Siau, 1978; Lubat et al ., 1989; Thélohan, 1895; Bahri et al ., 2003). Both these species are cryptic, having been described from a wide range of tissues and hosts.…”

“…(2012) gave molecular identity to the parasite upon its redescription from the gills of common barbel and Iberian barbel Luciobarbus bocagei (Steindachner, 1864) in Hungary and Portugal. Finally, M. circulus (Achmerov, 1960) Landsberg and Lom, 1991, originally M. circulus , was first described from the gills of Cyprinus carpio Linnaeus, 1758 in Russia, being later reported from the gills, fins, muscle and kidney of M. cephalus in the Black Sea (Naidenova et al ., 1975; Iskov, 1989; Yurakhno, 2004; Eiras et al ., 2005). Given the molecular trends accepted for myxobolids (Andree et al ., 1999; Kent et al ., 2001; Eszterbauer, 2004; Fiala, 2006; Carriero et al ., 2013), it is highly unlikely for a cypriniform-infecting species to parasitize members of the order Mugiliformes.…”

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“…Ortholinea divergens, on the other hand, was first described from American plaice Hippoglossoides platessoides (Fabricius, 1780) in the North Atlantic coast (cited in Lom and Dykova, 1992) and since then, it has been reported from a wide range of host fish grey wrasse Symphodus cinereus (Bonnaterre, 1788), five-spotted wrasse Symphodus roissali (Risso, 1810), Symphodus ocellatus (Linnaeus, 1758), golden (Yurakhno, 2013). However, infection prevalence of 2.7% recorded in the present study is lower than that of above mentioned authors.…”

“…Sphaeromyxa sevastopoli was first identified from gall bladder of monkey goby Neogobius fluviatilis from Karadag region in Russian Black Sea coast and since then it has been reported from a wide range of host species (Parablennius sanguinolentus, Atherina boyeri, Gaidropsarus mediterraneus, Mesogobius batrachocephalus, Neogobius fluviatilis, N. melanostomus, N. platyrostris, N. eurycephalus (Yurakhno, 2009(Yurakhno, , 2013. However, Sinop is a new locality for this parasite species in the Black Sea.…”

“…Myxidium parvum (Yurakhno, 1991) was described from tentacled blenny Parablennius tentacularis and sphynx blenny, Aidablennius sphynx near Sevastopol and Karadag in the Black Sea with infection prevalence values between 33 and 75% (Yurakhno, 2009(Yurakhno, , 2013. In the present study, it was found in the gall bladder of P. tentacularis as well as peacock blenny Salaria pavo (Risso, 1810) in prevalence values of 6.4% and 50%, respectively, the latter being a new host record for this parasite species.…”