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Öğe Comparative Study on Parasite Fauna of the Whiting Merlangius merlangus in the Northern and Southern Zones of the Black Sea(Central Fisheries Research Inst, 2015) Ozer, Ahmet; Kornyychuk, Yulia M.; Ozturk, Turkay; Yurakhno, ViolettaThe 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 Muller, 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 revealed considerable differences in the prevalence and abundance values of T. gobii, Gy. alviga, Gr. erinaceus and H. aduncum between the two regions indicating two distinct groups of whiting thus supporting other studies suggesting a complex structure of whiting stocks in the Black Sea.Öğe Digenean Metacercariae Parasitic in Fishes in Sarikum Lagoon Lake, Sinop, Turkish Black Sea Coast: Species Diversity, Seasonal Occurrence and Histopathological Effects(Inst Zoology, Bas, 2019) Ozturk, Turkay; Ozer, AhmetThe study aimed to identify the digenean metacercariae parasitic in fishes in the Sarikum Lagoon Lake located at the Black Sea coast of Turkey. A total of 906 fish specimens belonging to 6 fish species (Aphanius danfordii, Neogobius melanostamus, Proterorhinus marmoratus, Gasterosteus aculeatus, Platichthys flesus and Chelon auratus) were examined monthly during a period of one year. Four digenean species recorded as encysted metacercariae were identified; these were three species belonging to Heterophyidae, i.e. Ascocotyle coleostoma, Pygidiopsis genata and Cryptocotyle concava, and one species of the family Diplostomatidae, i.e. Posthodiplostomum sp. Ascocotyle coleostoma was found to be the dominant species and detected in all examined fish species. Posthodiplostomum sp. was detected only in A. danfordii. Cryptocotyle concava was detected in N. melanostamus and P. marmoratus. Infection prevalence and intensity were calculated and discussed for each digenean species recorded as metacercariae in relation to season. The eye, heart and gill tissues of infected fish with parasites were examined histologically. The histological evaluation indicated that the histological lesions were more severe in gills.Öğe First Report of Chryseobacterium sp from Koi (Cyprinus carpio) in Turkey(Israeli Journal Of Aquaculture-Bamidgeh, 2016) Didinen, Behire Isil; Onuk, Ertan Emek; Ozturk, Turkay; Metin, Secil; Oz, Meryem; Cayli, Ozge; Kubilay, AysegulIn this study, we isolated Chryseobacterium sp. from koi in Turkey. The disease outbreak occurred in fish weighing 10-300g (water temperature 9-10 degrees C) in November 2011-February 2012. The cumulative mortality rate was approximately 55% over 4 months. Infected koi exhibited anorexia, weakness, emaciation, damage to dorsal and caudal fins, grey-white skin discoloration (1-1.5cm) in the head area, large open wounds in skin with disease progression, necropsy findings, paleness of the liver, enlarged spleen and kidney, acidic fluid in the body cavity. Samples for bacteriological examinations were collected from the kidney, liver, and spleen using sterile swabs; these samples were streaked onto Anacker ordal Agar and incubated at 18 degrees C for 48 h. Five bacterial isolates were obtained from diseased fish. Phenotypic characteristics of the isolates were determined by conventional methods and rapid identification kits, API 20NE, and API ZYM. Comparative 16S rRNA gene sequence analysis demonstrated that isolate Sin57 belonged to the genus Chryseobacterium, with highest sequence similarity (98.5%) to C. aahli T68(T) and C. limigenitum SUR2.Öğe Grillotia erinaceus (van Beneden, 1858) (Cestoda:Trypanorhyncha) from whiting in the Black Sea, with observations on seasonality and host-parasite interrelationship(Walter De Gruyter Gmbh, 2014) Ozer, Ahmet; Ozturk, Turkay; Kornyushin, Vadim V.; Kornyychuk, Yulia; Yurakhno, ViolettaThe 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 parameters were also determined at both sampling sites in relation with host length, sex and season.Öğe Light and Scanning Electron Microscopic Observations on Grillotia erinaceus (Cestoda: Trypanorhyncha)(Istanbul Univ Press, Fac Aquatic Sciences, 2020) Ozer, Ahmet; Ozturk, Turkay; Okkay, Sevilay; Yurakhno, Violetta; Kornyychuk, JuliaIn 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 clav- ata caught by commercial fishing vessels off Sinop, Turkey. Standard parasitological investigation methods were applied and morphological diagnostic features of the whole parasite, bothria, scolex, tentacular armatures and tentacles were studied in detail using a light and Scanning Elec- tron Microscope (SEM). The plerocercoids of this parasite had a total length of 5.96 mm on average and this was 21.6 mm on average in adults. The measurement data of all morphological diagnostics are provided and photomicrographs of each part of the parasite are presented. This study also provides the detailed morphological features of both plerocercoids and adults of G. erinaceus in M. merlangus and R. clavata for the first time in the Turkish coasts of the Black Sea.Öğe Metazoan Parasite Fauna of the Red Mullet, Mullus barbatus ponticus Essipov, 1927 in the Sinop Coasts of the Black Sea(Central Fisheries Research Inst, 2018) Ozturk, Turkay; Yesil, AliIn the present study, a total of 330 specimens the red mullet, Mullus barbatus ponticus caught in the Black Sea coasts near Sinop, Turkey were investigated throughout a 1-year period for their metazoan parasite fauna. Thirteen metazoan parasite species, Loma sp., Proctotrema bacilliovatum, Galactosomum lacteum (metacercariae), Progrillotia dasyatidis, Nybelinia sp., Scolex pleuronectis (pleurocercoid), Hysterothylacium fabri, H. aduncum, Ascarophis valentina, Capillaria sp. Contracaecum sp., unidentified larval nematode (L2) and Acanthocephaloides irregularis were identified. The overall infection prevalence and mean intensity values were 97.88% and 34.12 +/- 5.23 parasites per infected fish, respectively. Proctotrema bacilliovatum was the core species with infection prevalence of 70.61% and mean intensity value of 29.09 +/- 7.01 parasites per infected fish. The infection indice values for each parasite species were also determined and discussed according to season, length classes and sex of fish. This paper is the first report on metazoan parasite fauna of the red mullet in Turkey.Öğe Monogenean Fish Parasites, Their Host Preferences and Seasonal Distributions in the Lower Kizihrmak Delta (Turkey)(Central Fisheries Research Inst, 2014) Ozturk, Turkay; Ozer, AhmetThis comprehensive research study was conducted to determine the monogenean fauna of 16 fish species belonging to Cyprinidae, Mugilidae, Gobiidae, Percidae, Cyprinodontidae, Gasterosteidae, Cobitidae, Atherinidae, Poecilidae and Sygnidae in Lower Kizilirmak Delta located by the coasts of the Black Sea in the northern part of Turkey. A total of 1049 fish specimens were collected during the period between December 2010 and November 2011. Gyrodactylus proterorhini, G. cyprini, G. arcuatus, Dactylogyrus extensus, D. chalcalburni, D. difformis, Ancyrocephalus paradoxus, Ligophorus mediterraneus, L. cephali, Solostamenides mugilis and Paradiplozoan homoion were identified to the specific level while one Gyrodactylus and one Salsuginus species were identified only to the generic level. Some monogeneans were found to be specific to some host families, especially Ligophorus for Mugilidae and Dactylogyrus for Cyprinidae. Prevalence (%) and intensity indices were determined and discussed for each monogenean species and/or genus on respective hosts. All the monogenean species were recorded for the first time in the Lower Kizilirmak Delta. Gyrodactylus cyprini and Ancyrocephalus paradoxus represented new parasite records for Turkey.Öğe PARASITE DIVERSITY OF THE BLACK SEA FISHES IN TURKISH COASTAL AREAS(Turkish Marine Research Foundation-Tudav, 2017) Ozer, Ahmet; Ozturk, Turkay[No abstract available]Öğe Parasites of juvenile golden grey mullet Liza aurata Risso, 1810 in Sarikum Lagoon Lake at Sinop, Turkey(Springer International Publishing Ag, 2013) Ozturk, TurkayJuvenile golden grey mullet, Liza aurata were collected from Sarikum Lagoon Lake which connected to the Black Sea at Sinop, Turkey and examined for parasitic fauna. A total of 219 fish were investigated throughout a 1-year period. Parasite species recovered were Trichodina lepsii, T. puytoraci, Gyrodactylus sp., Ligophorus cephali, Ligophorus mediterraneus, Solostamenides mugilis, Ascocotyle sp. (metacercaria) and Ergasilus lizae. Overall infection prevalence (%) and mean intensity values were 95.9% and 412.65 +/- 85.31 parasites per infected fish, respectively. Infection prevalence and mean intensity values for each parasite species in relation to season and fish size were also determined and discussed. While Ligophorus cephali and L. mediterraneus are new records for Turkish parasite fauna, the juvenile Liza aurata is a new host record for Ligophorus cephali and L. mediterraneus.Öğe TRICHODINA GOBII (CILIOPHORA: TRICHODINIDAE) ON WHITING MERLANGIUS MERLANGUS WITH A CHECKLIST FROM TURKISH AND RUSSIAN COASTS OF THE BLACK SEA(Hungarian Natural History Museum, 2015) Ozer, Ahmet; Ozturk, Turkay; Kornyychuk, Yulia M.; Yurakhno, ViolettaTrichodina 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.Öğe Trichodinid fauna of freshwater fishes with infestation indices in the Lower Kizilirmak Delta in Turkey and a checklist of trichodinids (Ciliophora: Trichodinidae) in Turkish waters(Tubitak Scientific & Technological Research Council Turkey, 2015) Ozer, Ahmet; Ozturk, TurkayThis paper provides both the results of a comprehensive research study on trichodinid parasites of several fish species and a review of current trichodinid fauna of fish species revealed during parasitological survey studies in Turkey. The present study yielded 1 Tripartiella, 1 Paratrichodina, and 8 Trichodina identified to the species level and 3 Trichodina identified to the generic level in 12 fish species belonging to several families; their host preferences and infestation indices have also been presented. As a result of fish parasite investigations, a total of 33 trichodinid species have been identified on 30 fish species in Turkey. Considering the total number of 850 marine and freshwater fish species present in the Turkish fauna, the present data on the trichodinid fauna of fishes in the Lower Kizilirmak Delta and the literature studies conducted so far clearly point out the necessity of conducting more investigations on unexamined fish species to attain a more complete picture throughout all Turkish waters. The bioindicator potential of trichodinid parasites will also provide clues for the current status of aquatic environments.Öğe Trichodinid Parasites (Protozoa: Ciliophora: Peritrichida) of Invasive Gobiid Fish Inhabiting The Lower Kizilirmak Delta in Samsun, Turkey(Zoological Soc Pakistan, 2013) Ozturk, Turkay; Cam, ArzuThe trichodinid fauna of three gobiid species, the monkey goby Neogobius fluviatilis (Pallas, 1814), the tubenose goby Proterorhinus marmoratus (Pallas, 1814) and the marbled goby Pomatoschistus marmoratus (Risso, 1810) collected from the Lower Kizilirmak Delta in Samsun, Turkey were investigated during December 2010-November 2011. Three trichodinid species including Trichodina domerguei Wallengren, 1897, Trichodina heterodentata Duncan, 1977 and Paratrichodina corlissi Lom et Haldar, 1977 were identified on 222 gobiid fish specimens. The existence of trichodinid parasites in relation to the body parts of three gobiid species as well as their seasonal occurrences were determined and discussed. This paper is the first report on the trichodinid fauna on the monkey goby, the tubenose goby and the marbled goby in Turkey. Trichodina heterodentata Duncan, 1977 and Paratrichodina corlissi Lom et Haldar, 1977 are new records for Turkish fish parasite fauna, while T. heterodentata is a new parasite record for Neogobius fluviatilis, Proterorhinus marmoratus and Pomatoschistus marmoratus.
