Violetta Yurakhno

A. O. Kovalevsky Institute of Biology of the Southern Seas of RAS

The purpose of the research is to study the localization of myxosporeans of the genus Kudoa Meglitsch, 1947 in body fish and possible ways for them to master organs and tissues in the process of evolution, the form of spores associated with localization, as well as the ways of their release into the environment and getting into new hosts. Materials...

PurposeMyxozoans are economically important group of metazoan parasites, which can cause diseases in a large variety of commercially important fishes. Increased knowledge on molecular features has shown that traditional descriptive characters may be misleading. Combination of both descriptive and molecular features is therefore necessary for an int...

Albina Gaevskaya (maiden name Yatsevich) was born on 21 August, 1937, in Sevastopol. She was a very beautiful child; perhaps, this was facilitated by the mixing of blood of representatives of different nations – Poles, Lithuanians, Italians, Ukrainians, Moldovans, Kazakhs, and Russians. As a child, Albina often fought with boys and gained her small...

Приведены сведения о паразитировании в мышцах двух видов бычков-вселенцев в Чёрном море у берегов Севастополя двух видов миксоспоридий рода Kudoa. Один изолят найден в полосатом трёхзубом бычке Tridentiger trigonocephalus, другой изолят – в красноротом бычке Gobius cruentatus. Предполагается, что источником заражения рыб-вселенцев явились аборигенн...

Альбина Витольдовна (девичья фамилия — Яцевич) родилась 21 августа 1937 г. в Севасто- поле. Она была очень красивым ребёнком; возможно, этому способствовало смешение кровей представителей разных народов — поляков, литовцев, итальянцев, украинцев, молдаван, каза- хов, русских. В детстве Альбина была настоящей грозой мальчишек: она часто вступала с н...

In this study, we examined myxozoan infections of Labeobarbus batesii sampled from the Makombè River in Cameroon. Fish were infected with Myxobolus makombensis n. sp. in the gill filament and M. dibombensis in the fins. Mature myxospores of M. makombensis n. sp. are pyriform in frontal view and biconvex in lateral view, with a truncated and slightl...

In the present study, 2 species of myxozoan parasites, the novel Ceratomyxa scophthalmi sp. nov. and Myxidium finnmarchicum, were documented from the gallbladder of Scophthalmus maeoticus inhabiting the Turkish Black Sea coast at Sinop. C. scophthalmi sp. nov. had mostly spherical, clavate, and fine-grained polymorphic plasmodia that ranged in diam...

The data on parasitizing in the muscles of two species of invading gobies in the Black Sea off the coast of Sevastopol two species of myxosporeans of the genus Kudoa are presented. One isolate was found in the chameleon goby Tridentiger trigonocephalus, and another isolate was found in the red-mouthed goby Gobius cruentatus. It is assumed that the...

During a survey of myxosporean parasites of freshwater fishes in northern Vietnam, myxospores resembling those of the genus Myxobolus (Myxosporea: Myxobolidae) were found in the trunk muscle of 6 out of 35 specimens (17.14%) of wild goldfish Carassius auratus (Cypriniformes: Cyprinidae). The mature spores were 12.0 ± 0.4 (11.4 − 12.6) µm long, 8.5...

In March and April 2018, we carried out a survey of myxosporean parasites in coastal fishes collected from Nha Trang Bay in Vietnam’s East Sea. Of the 159 fish specimens, 18 fish species were represented, belonging to 10 families. In 8 host species, 7 myxosporean species were found, representing the genera Kudoa and Unicapsula. Two of these species...

Based on the authors' own data and literature data, an attempt is made to draw a complete picture of the so-iuy mullet Planiliza haematocheila (Temminck and Schlegel, 1845) (Mugilidae) infected with parasites belonging to different taxonomic groups. A critical analysis of some works has been carried out for the first time that makes it possible, on...

A new myxozoan species, Ceratomyxa binhthuanensis n. sp. (Myxosporea: Ceratomyxidae), was found in the gall bladder of blacktip grouper Epinephelus fasciatus (Perciformes: Serranidae) in the East Sea of Vietnam. Myxospores were observed floating free in the gall bladder of 3 out of 20 fish examined (15%). Mature myxospores were elongate and slightl...

This is the first report of microsporidia infection in marine fish from Vietnam. Microsporidia (Opistosporidia, Microsporidia) were identified in 4 species of coral fish Cheilinus chlorourus (Labridae), Abudefduf bengalensis (Pomacentridae), Pomacentrus brachialis (Pomacentridae), Atule mate (Carangidae) from Nha Trang Bay (East Sea), Khanh Hoa Pro...

Members of the class Myxosporea Bütschli, 1881 have a cosmopolitan distribution in a wide variety of fish species worldwide. In the present study, the black scorpionfish Scorpaena porcus collected from the Sinop coasts of the Black Sea was investigated for myxosporean parasites using both conventional and molecular methods in the period between Sep...

Loma acerinae is a xenoma-forming fish microsporidium described from common ruffe Gymnocephalus cernua (Perciformes: Percidae) and also found in Ponto-Caspian gobies (Gobiiformes: Gobiidae). This casts doubt on the strict host specificity of this parasite. The largest subunit RNA polymerase II ( rpb1 ) was used as a genetic marker of the parasite i...

A synopsis of the species of Zschokkella Auerbach, 1910 (Myxozoa: Bivalvulida: Myxidiidae) is presented, including 94 nominal species from piscine hosts and 3 additional nominal species from amphibian or reptilian hosts. The most relevant morphological and morphometric features of both myxospores and trophozoite stages (when available) are presente...

Metacercariae of Cryptocotyle are among the most numerously recorded trematode parasites in the estuarine biocenoses of the Azov-Black Sea basin. These parasites can massively affect body surface, gills and fins of host fishes including gobiids. However, information on the influence of Cryptocotyle metacercariae on the physiological and biochemical...

Впервые обобщены сведения о всей паразитофауне пиленгаса Planiliza haematocheila на основе литературных и собственных данных. Выявлены черты её сходства и различия в нативном Тихоокеанском регионе и в районах вселения – Чёрном и Азовском морях. Выявлены потенциально-патогенные для здоровья хозяина виды паразитов. Предположено, что случаи вызывания...

Myxosporeans of the genus Ortholinea have a worldwide distribution and infect organs and tissues of exclusively marine fishes. Here we describe the morphological and molecular characteristics of Ortholinea mullusi sp. nov. parasitizing the urinary bladder and kidney tubules of red mullet Mullus barbatus collected from the coastal zone of Sinop in t...

A synopsis of the species of Zschokkella Auerbach, 1910 (Myxozoa: Bivalvulida: Myxidiidae) is presented, including 94 nominal species from piscine hosts and 3 additional nominal species from amphibian or reptilian hosts. The most relevant morphological and morphometric features of both myxospores and trophozoite stages (when available) are presente...

Members of the genus Sphaeromyxa Thélohan, 1892 have been reported from a wide variety of fish species worldwide. In the present study, specimens of rusty blenny, Parablennius sanguinolentus, collected from Sinop on the Turkish Black Sea coast were investigated for myxosporean parasites by using both conventional and molecular methods. Sphaeromyxa...

History of formation of Ponto-Caspian basin fish myxosporean fauna is examined. This work is based on our own material on myxosporean parasites of fish from the Black Sea (collected in 1987–2018) and the Sea of Azov (1997–2016). Totally, we have investigated 15 368 specimens of 87 species of fish (14 297 specimens of 80 species of fish in the Black Sea...

In the present study, the plerocercoids of Grillotia erinaceus were obtained from the wall of the anterior oesophagus, stomach, pyloric caeca and liver of teleost Black Sea whiting Merlangius merlangus and adults were collected from the intestine of elasmobranch thornback rays Raja clavata caught by commercial fishing vessels off Sinop, Turkey. Sta...

Кефали являются объектом промысла во Вьетнаме, а некоторых из них разводят на рисовых чеках. Интенсивное развитие в этой стране марикультуры рыб, а также большая доля гидробионтов в рационе населения требуют знаний не только о видовом составе паразитов, но и об их жизненных циклах, патогенности, медицинском и эпизоотологическом значении. Фауна морс...

Кефалевые рыбы являются объектом промысла во Вьетнаме; некоторых из них разводят на рисо- вых чеках. Интенсивное развитие в этой стране марикультуры рыб, а также большая доля гидро- бионтов в рационе населения требуют знаний не только о видовом составе паразитов, но и об их жизненных циклах, патогенности, медицинском и эпизоотологическом значении....

Members of the genus Kudoa are typically histozoic and only a few are coelozoic parasites, mainly in marine fishes. In the present study, 2 novel Kudoa species were recovered and described as Kudoa niluferi sp. nov. in the musculature of Neogobius melanostomus and Kudoa anatolica sp. nov. in the musculature, urinary bladder and kidney of Atherina h...

It has been shown for the first time in experiment, that placing of marine species myxosporean Kudoa nova spores into fresh water influences negatively their construction and preservation in the case, when spores are in cysts, isolated from muscles and put to refrigerator. The percent of anomalous spores in these cysts at the 34-th day of experimen...

All available literature and perennial the author’s own fees of Kudoa genus myxosporeans of the world fauna fish have been analyzed. The specificity of these parasites, their site of infection in the body of the host, distribution in various reservoirs of our planet have been considered. Pathogenic species of myxosporeans of the genus Kudoa, parasi...

Totally 690 and 423 whiting Merlangius merlangus samples were collected from two localities off Southern (Sinop) and Northern coasts (Balaklava Bay) of the Black Sea, respectively, and examined for myxosporeans in the period from May 2011 to March 2014. Ceratomyxa merlangi and Myxidium gadi were the only myxosporean parasites identified in the cont...

Myxosporeans of the genus Ortholinea have a worldwide distribution and infect organs and tissues of exclusively marine fishes. Here we describe the morphological and molecular characteristics of Ortholinea mullusi sp. nov. parasitizing the urinary bladder and kidney tubules of red mullet Mullus barbatus collected from the coastal zone of Sinop in t...

Members of the phylum Myxozoa are among the most cosmopolitan parasites of fish, and the genus Myxobolus is the largest within the class Myxosporea in freshwater and marine environment from all over the world. Myxobolus parvus has been reported from mainly mugilid fishes from different localities including the Black Sea. Leaping mullet Liza saliens...

Myxosporeans of the genus Henneguya have a global distribution and infect organs and tissues of both marine and freshwater fishes. Here we describe the morphological, histological and molecular characteristics of Henneguya sinova sp. nov. parasitizing the gill arches of tentacled blenny Parablennius tentacularis (Perciformes: Blenniidae) collected...

In the present study, we investigated the comparative infection levels, ecology and host-parasite interrelationship of a nematode Hysterothylacium aduncum (Rudolphi, 1802) in whiting, Merlangius merlangus (L., 1758) in southern (Sinop) and northern (Balaklava Bay) coasts of the Black Sea for the first time. Fish were collected throughout a period f...

Round goby Neogobius melanostomus, common sole Solea solea, rusty blenny Parablennius sanguinolentus, tentackled blenny Parablennius tentacularis, peacock blenny Salaria pavo and annular seabream Diplodus annularis collected by angling in Sinop coasts of the Black Sea in the period from March to July 2014 were investigated for myxosporean and monog...

Ortholinea orientalis (Schulman and Schulman-Albova, 1953) is reported from the urinary bladder of the fish hosts Alosa tanaica (Clupeidae) and Mullus barbatus ponticus (Mullidae) from the Black Sea. Infection prevalence is 33.3% and 2.5% in M. barbatus ponticus and A. tanaica, respectively. A morphometric description of the spores is provided. Thi...

In this comprehensive research study, a total of 816 fish specimens belonging to 31 fish species collected from Sinop coasts of the Black Sea were investigated for myxosporean parasites in the period from February 2013 to November 2014. Gills, urinary bladder, kidney, gall bladder, intestine and gonads were examined at x400 magnification using a ph...

In the present study, we investigated the comparative infection levels, ecology and host-parasite interrelationships of a nematode Hysterothylacium aduncum (Rudolphi, 1802) in the digestive tract of whiting, Merlangius merlangus (L., 1758), in Turkish and Russian coasts of the Black Sea for the first time. Fish were collected throughout a period fr...

Bu araştırmada, Karadeniz’in Sinop ve Sivastopol kıyılarından yakalanan mezgit balığının miksozoa faunası ve enfeksiyon değerleri karşılaştırmalı olarak belirlendi. Mayıs 2011 – Nisan 2014 tarihleri arasında Sinop kıyılarından 690 ve Sivastopol kıyılarından 423 adet mezgit balığı incelendi. Balıkların boyları ölçüldü ve cinsiyetleri belirlendi. İnc...

Bu araştırmada, Karadeniz’in Sinop ve Sivastopol kıyılarından yakalanan mezgit balığının miksozoa faunası ve enfeksiyon değerleri karşılaştırmalı olarak belirlendi. Mayıs 2011 – Nisan 2014 tarihleri arasında Sinop kıyılarından 690 ve Sivastopol kıyılarından 423 adet mezgit balığı incelendi. Balıkların boyları ölçüldü ve cinsiyetleri belirlendi. İnc...

The comparative parasite fauna of the whiting Merlangius merlangus (Linnaeus, 1758) in the Black Sea was determined using samples collected from the southern zone of the Sea near Sinop, Turkey and from the northern zone in Balaklava Bay, Sevastopol, Russia. The parasitological survey was conducted monthly between May 2011 and April 2014 on 690 fish...

Gyrodactylus alviga is a generalist species reported in many Black Sea fish species, but whiting is known to be its main host. It is the only monogenean parasite that has been reported so far on the skin, fins and gills of whiting Merlangius merlangus in the Black Sea. A total of 690 fish from Turkey and 423 fish from Russia were examined to detect...

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...

Whiting Merlangius merlangus L., 1758 collected from the Black Sea coasts of Sinop, Turkey, during May 2011 – May 2013 period were examined for parasites and one of 530 examined fish specimens caught in March 2012 had numerous oocysts of Eimeria sardinae (Thélohan, 1890) Reichenow, 1921 in its intestinal content. The parasite has not been reported...

Objective: In the present study, we investigated the ecology and host-parasite interrelationship of a monogenean Gyrodactylus alviga Dmitrieva et Gerasev, 2000 on the gills of whiting, Merlangius merlangus (L., 1758), in Turkish Black Sea coasts for the first time. Methods: Whiting were collected throughout a period from May 2011 to March 2014 from...

Objective: In the present study, we investigated the myxosporean parasite fauna of several fish species inhabiting Sinop coasts of the Black for the first time. Methods: Fish were collected by angling in Sinop coasts of the Black Sea in the period from March to July 2014. Round goby Neogobius melanostomus (Pallas, 1814), common sole Solea solea (L...

The genus Grillotia Guiart, 1927 is cosmopolitan in its distribution and the type-species, G. erinaceus (van Beneden, 1858), has been relatively well studied. However, this study provides infection indices of Grillotia erinaceus from southern and northern Black Sea whiting Merlangius merlangus for the first time. The specimens of Grillotia erinaceu...

Karadeniz’in Sinop kiyilarindan Mayis 2011 – Mayis 2013 tarihleri arasinda yakalanan mezgit baliginin, Merlangius merlangus L., 1758, parazitleri arastirildi ve incelenen 530 adet baliktan Mart 2012 tarihinde yakalanan 1 adedinin barsak iceriginde cok sayida Eimeria sardinae (Thelohan, 1890) Reichenow, 1921 ookistinin varligi belirlendi. Bu parazit...

Existing data on Myxozoa parasites infecting mullets were reviewed. The validity of nine species names was updated. Sixteen species were registered during analysis of original material collected in the Mediterranean, Black, Azov, and Japan Seas in 2004-2005. A new bivalvulid myxozoan parasite, Myxobolus adeli n. sp., was described from the inner or...

Four gobiid species, Babka gymnotrachelus, Neogobius melanostomus, Neogobius fluviatilis, and Proterorhinus semilunaris, were parasitologically studied in different localities of the Dnieper and Vistula river basins. The highest number of parasitic species was found in N. fluviatilis (35 taxa). The parasite fauna of N. melanostomus, B. gymnotrachel...

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 iden...

Parasite fauna of garfish Belone belone was determined in 16 fish specimens collected from Turkish coasts of the Black Sea in January and February 2013. A total of 6 parasite species was identified:Cerafomyxa beloneae, Sigmomyxa sphaerica, Axine belones, Flysterothylacium aduncum, Diphyllobothrium sp. procercoids and Trichodina sp. Their morphometr...

Complex influence of infection by myxosporeans Myxidium gadi Georgevitsch, 1916; Ceratomyxa merlangi Zaika, 1966 and nematode Hysterothylacium aduncum (Rudolphi, 1802) on the morphophysiological and biochemical parameters of the Black sea whiting Merlangius merlangus euxinus (Nordmann, 1840) were studied. Significant decrease of spleenosomatic inde...

Two New Families and a New Species of Myxosporeans (Myxozoa, Myxosporea) of the Mediterranean and Black Sea Fishes Descriptions of two new families — Polysporoplasmidae fam. n. (Syn. Sphaerosporidae Davis, 1917 in Sitja-Bobadilla, Alvarez-Pellitero, 1995) and Gadimyxidae fam. n. (syn. Parvicapsulidae Schulman, 1953 in Kie et al., 2007), and one new...

Helminths collected from 55 Steller's sea lions in the western and central Bering Sea examined. Helminth species, their localization in the host organism, invasion indices, categories, and host ranges are reported. Helminthofaunas of sea lions from various sea areas are compared. Forming of the recent Steller's sea lion helminthofauna and its links...

Concentration of total lipids and main lipid classes in the tissues of the Black Sea whiting males and females under different degrees of their infestation with the myxosporean Myxidium gadi is studied. Fishes were examined during the periods of fattening and spawning. Decrease of the total lipid (2-3 times) and triacylglycerol (3-4 times) concentr...

A new multivalvulid myxozoan parasite, Kudoa unicapsula n. sp., is described from the intestinal mesentery, intestine and pyloric caeca of the thin-lipped grey mullet Liza ramada (Risso 1826) and the golden grey mullet L. aurata (Risso, 1810) from the Mediterranean coastal waters of Spain. It is characterized by the presence of elongated, rice corn...

The structure of a new microsporidian parasite from intestine wall of Mullus barbatus ponticus Essipov, 1927 (Mullidae) is studied, and generic position is established. Uninucleate sporonts measuring about 2.6 ´ 5.2 μm, sporoblasts and ovoid spores 3.6 – 4.1 ´ 2.1 – 2.4 μm in size containing big posterior vacuole with posterosome are described. Eac...

The myxosporean fauna of the Black Sea is predominantly marine with a few brackish and freshwater species. Seasonal changes in water temperature influence the life-cycle of Black Sea myxosporeans primarily through the biology of the host. This is because the mass formation of spores in Myxosporea takes place when hosts form the largest shoals. The...