Papers by Yulia M. Kornyychuk
Helminthologia
Summary A total of 357 Syngnathidae fishes (Syngnathus abaster Risso, 1827, S. typhle Linnaeus, 1... more Summary A total of 357 Syngnathidae fishes (Syngnathus abaster Risso, 1827, S. typhle Linnaeus, 1758 and Hippocampus hippocampus (Linnaeus, 1758) caught in different habitats along Crimean Black Sea shelf were examined for presence of endohelminths and revealed to be hosts of 15 helminth species. The fishes are second intermediate hosts for five “birds’” digenean species and nematodes (larvae of three species and immature adults of one more species) completing life-cycles in waterbirds and fish; for two acanthocephalans and three cestodes larvae ending development in fish. We suggest, basing on data on feeding of the Black Sea predatory fish and waterbirds, that Syngnathid fishes are paratenic hosts in parasitic systems of most cestodes, nematodes and acanthocephalans. All the trematodes found are generalists at metacercarial stage; specialists Timoniella imbutiformis and Aphallus tubarium use Syngnathidae as definitive hosts. Cestodes, nematodes as well as acanthocephalans found ar...
Морской биологический журнал, 2020
The results of the work of the online conference "Actual problems of research of Black Sea e... more The results of the work of the online conference "Actual problems of research of Black Sea ecosystems – 2020" are presented. The scientific forum was held on 19–22 October 2020 on the basis of IBSS. More than 140 researchers, representing 15 Russian scientific and educational institutions, took part in the conference.
Marine Biological Journal, 2020
Opecoelidae Ozaki, 1925 (Trematoda: Opecoeloidea) is the biggest trematode family in the Black Se... more Opecoelidae Ozaki, 1925 (Trematoda: Opecoeloidea) is the biggest trematode family in the Black Sea in terms of species and genera number. Maritae of the most common Black Sea Opecoelidae trematodes are well described morphologically; nevertheless, information on their genomes structure is sketchy, and data on mitochondrial genomes are absent. The aim was to study the structure of mitochondrial genome fragments of Black Sea trematode species: Cainocreadium flesi Korniychuk & Gaevskaya, 2000, Gaevskajatrema perezi (Mathias, 1926) Gibson & Bray, 1982, and Helicometra fasciata (Rudolphi, 1819) Odhner, 1902. Sequences were made for CO1 (the cytochrome c oxidase subunit I) and 16S mitochondrial genes. To amplify CO1 gene fragment of Cainocreadium and Helicometra trematodes, primers were developed. Phylogenetic relationships within the analyzed part of the Opecoelidae family were reconstructed on the basis of our data and the corresponding GenBank data by the Maximum Likelihood estimation ...
Parasitology Research, 2017
Totally 690 and 423 whiting Merlangius merlangus samples were collected from two localities off S... more 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 content of gall bladder and their infection indices of prevalence (%) and intensity were calculated for length classes and sex of fish as well as for the seasons at both sampling localities. Overall infection prevalence of C. merlangi was 22.6% in Sinop and 27.9% in Balaklava samples while those values of M. gadi were 18.4% and 28.6% in Sinop and Balaklava samples, respectively. Both parasite species were also found to be co-existed in whiting samples. This is the first comprehensive epizootiological study yielded comparable data on C. merlangi and M. gadi infections in whiting in the southern and northern coasts of the Black Sea.
Marine Biological Journal, 2018
К 125-ЛЕТИЮ СО ДНЯ РОЖДЕНИЯ ВЛАДИМИРА АЛЕКСЕЕВИЧА ВОДЯНИЦКОГО В январе 2018 г. исполнилось 125 ле... more К 125-ЛЕТИЮ СО ДНЯ РОЖДЕНИЯ ВЛАДИМИРА АЛЕКСЕЕВИЧА ВОДЯНИЦКОГО В январе 2018 г. исполнилось 125 лет со дня рождения Владимира Алексеевича Водяницкого-личности, знаковой для гидробиологической науки. Он родился в небольшом городке Константиноград Полтавской губернии. Когда Володе было четыре года, семья продала крестьянам остатки имения и переехала в Харьков, где он окончил реальное училище и Харьковский университет. С ранних школьных лет Владимир Алексеевич принимал участие в крайне интересных ему ботанических и зоологических экскурсиях, организовывал домашние аквариумы, читал огромное число книг и посещал студенческий кружок натуралистов. В это время сформировался круг научного общения Владимира Алексеевича, состоявший из выдающихся гидробиологов и зоологов и из тех, кто стал известен и значим впоследствии. Сам считавший себя «провинциальным учёным», Владимир Алексеевич, безусловно, слегка лукавил. Последовательным, настойчивым сторонником самых передовых научных идей своего времени он был всегда и везде, где бы ни работал. Взяв на себя в 1921 г. труд по организации биостанции в Новороссийске, он сделал всё для того, чтобы её работа приносила пользу как морской гидробиологии, так и городу. За 10 лет его заведования биостанцией были описаны сезонные явления в жизни черноморских водорослей и различия их сообществ в разных местах обитания, в том числе в зависимости от степени загрязнения вод. Впервые были описаны морфологические особенности личинок и икры черноморских рыб и их основные систематические группы. Была показана важность изучения ихтиопланктона для суждения о биологии видов в целом Впервые в отечественной ихтиологии вопросы формирования фауны рыб были рассмотрены с учётом экологии личиночных стадий их развития. В дальнейшем изучение ихтиопланктона стало обязательной и очень важной частью планктонных и рыбохозяйственных исследований на Чёрном море. Оно было продолжено В. А. Водяницким и его учениками в Севастополе. В 1931 г. (с перерывом в 1939-1942 гг., когда Владимир Алексеевич организовал кафедру гидробиологии и ихтиологии в Ростовском университете и заведовал ею) начался севастопольский период его жизни. Владимир Алексеевич сосредоточился на изучении пелагических икринок и личинок черноморских рыб. Спустя 20 лет эта работа завершилась изданием соответствующего определителя, и поныне не потерявшего научной ценности. Сделанные обобщения позволили сформулировать вывод TO THE 125 th ANNIVERSARY OF VLADIMIR VODYANITSKY This year the 125ᵗʰ birthday of the outstanding hydrobiologist, D. Sc. (Biol.), Professor Vladimir Vodyanitsky is celebrated. Under his leadership, the Sevastopol Biological Station became a research institute significant for world science. He headed expeditions to Black, Mediterranean and Red seas. More then 30 PhD theses were defended under the guidance of Vladimir Vodyanitsky. He was the author of more than 160 publications and the editor of more than 60 monographs and collections of scientific papers.
Впервые получены данные о фауне трематод у черноморского побережья Турции, в районе г. Синоп. Arn... more Впервые получены данные о фауне трематод у черноморского побережья Турции, в районе г. Синоп. Arnola microcirrus, Monorchis parvus, Phyllodistomum acceptum, Helicometra fasciata, Bucephalus marinum mtc. и Stephanostomum bicoronatum mtc. отмечаются в новом регионе Черного моря; для Stephanostomum cesticillum mtc. подтверждается встречаемость у ставрид от южных берегов Черного моря. Все 7 видов трематод регистрируются у типичных для них рыб-хозяев.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Marine Biological Journal, 2018
Data of genetic analysis of the Black Sea trematodes of Cainocreadium genus and Helicometra fasci... more Data of genetic analysis of the Black Sea trematodes of Cainocreadium genus and Helicometra fasciata were obtained for the first time. The nucleotide sequences of ITS1 rRNA gene cluster of Cainocreadium flesi from Platichthys flesus (GenBank entries MG980645, MG980646) and Cainocreadium sp. from Gaidropsarus mediterraneus (MG980643, MG980644, MK248037, MK248038) off Crimean Black Sea coast were found to be identical. Nevertheless, they have not been synonymized because of morphological differences known between these hostal morphs. Sequences of Cainocreadium from the Black Sea fish turned out to differ, by 4 positions, from similar sequences of a closely related Mediterranean congener, C. labracis (cercaria). Five insertions-deletions and 38 nucleotide sequences distinguish the ITS1 sequences of the Black Sea trematodes, C. flesi and Cainocreadium sp., from ITS1 sequences of another Mediterranean congener, C. dentecis. The ITS1 sequences of the Black Sea and Mediterranean Helicometr...
Marine Biological Journal, 2016
Biological collections are the basis for taxonomic research and study of the regional biodiversit... more Biological collections are the basis for taxonomic research and study of the regional biodiversity. The aims of this work are the creation of an electronic catalogue of collection specimens and taxonomic database (DB), as well as the development of a web resource to access them, for integrating biological collections in the research process. The IMBR Collection of Marine Parasites is used as material for this site. The PHP and JavaScript programming languages are used for its creation and the relation database management system MYSQL is used for manage database. The website and database are operated by the Apache webserver. Website marineparasites.org includes the electronic catalog of the collection, the taxonomic database and the repository of publications about species of fish parasites. The website provides an interactive interface to access the above listed resources. The functioning of the website is based on four entities related to each other: a collection object, specimens,...
Objective: In the present study, we investigated the ecology and host-parasite interrelationship ... more 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 local fishermen. A total of 690 fish specimens near Sinop were examined for parasites. Collected fish were transferred to parasitology laboratory and examined for parasites using conventional methods. Gyrodactylids were determined by screening smears of skin, fins and gills of fish using a light microscope at x100 magnification. Parasite species was identified and counted using a phase contrast Olympus microscope (BX53) equipped with a digital camera (DP50) and hand drawing attachment. Prevalence (%), mean intensity and mean abundance values were determined according to Bush et al. (1997). Kruskal-Wallis test (Nonparametric ANOVA) was per...
Acta parasitologica / Witold Stefański Institute of Parasitology, Warszawa, Poland, 2014
The genus Grillotia Guiart, 1927 is cosmopolitan in its distribution and the type-species, G. eri... more 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 erinaceus were obtained from subserosa of the anterior oesophagus, stomach, pyloric caeca, liver, ovaries and mesenterium of whiting caught by commercial fishing vessels off Sinop, Turkey and off Balaklava, Ukraine. Fish were examined during the period from May 2011 to April 2012. Prevalence and mean intensity values in 268 fish collected off Sinop in the Black Sea were 18.66% and 1.82 ± 0.16 parasites per infected fish, respectively. In Ukrainian 166 whiting samples collected off Balaklava in the Black Sea, however, G. erinaceus plerocercus infection prevalence was 10.24% and mean intensity 1.71 ± 0.75 parasites per infected fish. Infection param...
Parasitology Research, 2014
Four gobiid species, Babka gymnotrachelus, Neogobius melanostomus, Neogobius fluviatilis, and Pro... more 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. gymnotrachelus, and P. semilunaris consists of 23, 22, and 15 taxa, respectively. The species accumulation curves show stable accumulation of parasite species by all four fish hosts along the studied part of the corridor, from the Dnieper Estuary to the Vistula River delta. The plot reveals also that the studied gobies lose the parasites common in the host native range and accept new parasites from the colonized area. In the case of N. melanostomus, it complies with the enemy release hypothesis, as the parasite load was low in the invaded area if compared to the native range. The three other alien gobies are vector for Gyrodactylus proterorhini in the Baltic basin. Moreover, populations of this alien monogenean tend to be more abundant in their new range in comparison with the Black Sea basin. In general, the number of parasite species in the colonized area was of the same rank as in the native one for N. fluviatilis, and even higher for B. gymnotrachelus. This results from accumulating new parasite species along the gobiid invasion route. In particular, the N. fluviatilis, B. gymnotrachelus, and P. semilunaris lost some of their native parasites and gained the local ones after entering the post-dam part of the Vistula River; it can be interpreted as a partial escape from parasites.
Journal of Helminthology, 2015
Gyrodactylus alvigais a generalist species reported in many Black Sea fish species, but whiting i... more Gyrodactylus alvigais 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 whitingMerlangius merlangusin the Black Sea. A total of 690 fish from Turkey and 423 fish from Russia were examined to detect parasites. Infection indices of prevalence, mean intensity and mean abundance values were calculated for length classes and sex of fish, as well as for the seasons. There is a gradual increase in infection indices in relation with increasing host length classes and there are higher infection indices on female fish. Furthermore, despite lower prevalence indices in spring and winter, higher parasite intensity values were determined in these seasons. It is concluded that larger fish provided more space and food forG. alviga, and female fish were more parasitized as they were more active in searching for food, which enables the parasite to switc...
Acta Zoologica Academiae Scientiarum Hungaricae, 2015
Trichodina gobii was identified during a parasitological survey conducted on the parasite fauna o... more 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.
Whiting Merlangius merlangus L., 1758 collected from the Black Sea coasts of Sinop, Turkey, durin... more 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 (Thelohan, 1890) Reichenow, 1921 in its intestinal content. The parasite has not been reported previously from the Turkish Black Sea coasts as well as from this fish. Hence this is a new record for the Turkish parasite fauna. Nevertheless, whiting might not be a true host of this parasite. E. sardinae oocysts found in the intestine content of whiting might have come from natural preys such as Sprattus sprattus or Engraulis encrasicolus that are known host of this parasite.
In the present study, a total of 31 specimens of pontic shad, Alosa immaculata Bennet, 1835 (Pisc... more In the present study, a total of 31 specimens of pontic shad, Alosa immaculata Bennet, 1835 (Pisces: Clupaeidae) caught in the Black Sea coasts near Sinop, Turkey in 2010 were investigated for their parasite fauna. Four parasite species were identified: Mazocraes alosae (Herman, 1782), Pronoprymna ventricosa (Rudolphi, 1891), Lecithaster confusus Odhner, 1905 and Hysterothylacium aduncum (Rudolphi, 1802). H. aduncum was the core species with infection prevalence of 96.7% and mean intensity value of 97.1 ± 18.1 parasites per infected fish, followed by M. alosae (61.3% and 3.2 ± 0.5), P. ventricosa (35.5% and ± 12.5) and L. confusus (29% and 8.2 ± 2.8), respectively. In the present study, Mazocraes alosae, Pronoprymna ventricosa and Lecithaster confusus are reported from pontic shad off Turkish coasts of the Black Sea for the first time.
The comparative parasite fauna of the whiting Merlangius merlangus (Linnaeus, 1758) in the Black ... more 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 from Sinop and 423 fish from Sevastopol. A total nine parasite species were identified which eight of were found at both sampling localities. Trichodina gobii Raabe, 1959, Eimeria merlangi Zaika, 1966, Ceratomyxa merlangi Zaika, 1966, Myxidium gadi Georgevitsch, 1916, Gyrodactylus alviga Dmitrieva and Gerasev, 1997, Hysterothylacium aduncum (Rudolphi, 1802) larvae and adults, Scolex pleuronectis Müller, 1788 plerocercoids and Grillotia erinaceus (van Beneden, 1858) plerocerci were recorded from both sampling localities whereas Prodistomum polonii (Molin, 1859) Bray and Gibson, 1990 was found only once in the Sevastopol samples. This study...
Uploads
Papers by Yulia M. Kornyychuk