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    Comparision of morphological and anatomical characters in two catfish species, Silurus triostegus Heckel, 1843 and Silurus glanis L., 1758 (Siluridae, Siluriformes)
    (Univ Oradea Publ House, 2012) Unlu, Erhan; Deger, Deniz; Cicek, Tarik
    In this study, some morphological and anatomical characteristics of Silurus triostegus from Tigris and Euphrates Rivers and Silurus glanis from several lakes and Rivers of Turkey were investigated. Although, S. Triostegus has two mandibular barbels, usually in the young specimens there are four mandibular barbels, sometimes 3 mandibular barbels. This situation may show that some mandibular barbels reabsorbed. Maxillary barbels of S. glanis reach to the end of the pectoral fin, but those reach to only middle of pectoral fin in S. triostegus. Also, anterior mandibular barbels of S. giants shorter than posterior ones, but when two pairs of mandibular barbels are present in the S. triostegus, the anterior ones are always longer than posterior ones. The pectoral spine, vomerine teeth band, some cranial bones such as basioccipital, supraoccipital and mesethmoid show some difference between the two species.
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    The histopathological, cytopathological and ultrastructural effects of carbaryl on gills of Oreochromis niloticus (Linnaeus, 1758)
    (Elsevier, 2019) Ugurlu, Pelin; Satar, Elif Ipek; Cicek, Tarik
    Ultrastructural and histopathological reponses in the organs of living organisms are important and useful tools to determine the health condition and the effects of pollutants, such as pesticides, on the organisms. The aim of this study is to determine possible histopathological, cytopathological and ultrastructural alterations in gills of Oreochromis niloticus individuals exposed to 850 mu g/L carbaryl standart at 7th, 14th and 21st days with light and electron microscopes. The fish were exposed to carbaryl for 21 days and the histopatological, ultrastructural and cytopathological alterations occuring in the gill tissues of organisms were determined by light, Scanning and Transmission Electron Microscopes (SEM and TEM). At the end of the study, it was observed that carbaryl caused both histopathological and cytopathological changes in the gills of O. niloticus. It has been determined that the most of the pathological changes in the exposed organisms are the metabolic defence reactions.
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    MORPHOLOGICAL AND MERISTIC DIFFERENCES AMONG FRESHWATER FISH, CYPRINION KAIS (CYPRINIDAE) POPULATIONS IN TIGRIS RIVER OF SOUTHEAST TURKEY
    (Parlar Scientific Publications (P S P), 2016) Bilici, Serbest; Baysal, Arif; Cicek, Tarik; Uysal, Ersin; Unlu, Erhan
    In this study, morphometric and meristic characteristics of Cyprinion kais samples which is obtained from different locality in Tigris River were carried out. In order to determine the morphological and meristic variation among populations, discriminant function can be detected, intergroup discrimination with the help of this function are the most distinctive variables affecting the availability of discriminant analysis, has benefited from the descriptive features. Success rate of classifying the groups according to the result of discriminant analysis of morphometric characteristics of C. kais individuals belonging to 3 different locality of Tigris River is manifested as 96.1%. According to the results of classifications, morphometric characteristics of the individuals of Kulp and Kayser Stream and Tigris River are different. Success rate of classifying the groups according to the discriminant analysis of meristic characteristics of C. kais individuals appeared as 70.6%. Kulp and Kayser Stream from the locality groups showed similarity. It is determined that there is high variation between the locality groups belonging the samples of C. kais according to the morphometric and meristic characteristics.
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    The reproductive biology of Carasobarbus luteus and Capoeta trutta in the Tigris River, Turkey
    (Soc Francaise D Ichtyologie, 2016) Bilici, Serbest; Unlu, Erhan; Cicek, Tarik; Satici, Omer
    This study was carried out to determine the reproductive characteristics of two species of Cyprinidae, Longspine scraper, Capoeta trutta (Heckel, 1843) and Mesopotamian himri, Carasobarbus luteus (Heckel, 1843) in the Tigris River of Turkish part. A total of 307 C. luteus (138 females and 169 males) and 394 C. trutta (269 females and 125 males) specimens were analyzed. The sex ratio for C. luteus and C. trutta was 1:1.22 females (44.95%) to males (55.05%) and 1:0.47 females (68.27%) to males (31.73%), respectively. The reproduction period was between May and July for both species. The water temperature at this period was between 21.4 degrees C and 31 degrees C. Results indicated that the age at first maturity in C. luteus was three years for both males and females, and in C. trutta, three years for females and two years for males. The mean estimated fecundity was 5843 +/- 3554 for C. luteus and 5285 +/- 3105 for C. trutta. Maximal egg diameter for C. luteus and C. trutta were 1.61 +/- 0.45 mm and 0.91 +/- 0.41 mm, respectively.
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    SEASONAL VARIATIONS OF HEAVY METALS IN WATER, SEDIMENT AND TISSUES OF TWO FRESHWATER FISH SPECIES (CYPRINION MACROSTOMUM AND CAPOETA TRUTTA) FROM THE BATMAN DAM (TIGRIS BASIN), TURKEY
    (Parlar Scientific Publications (P S P), 2017) Kacar, Emel; Akin, Hulya Karadede; Cicek, Tarik; Unlu, Erhan
    In this study, seasonal variations of Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb levels in water, sediment and organs (liver, gill and muscle) of Cyprinion macrostomum and Capoeta trutta taken from Batman Dam were investigated. Generally, Fe had the highest concentrations in water, sediment and tissues of the fish among the metals that were studied. The heavy metal concentration in water was higher in the summer. Co, Ni, Cu and Zn values were below the detection limit in all seasons. In sediment, the metal concentrations were in order as follows: Fe > Mn > Ni > Cr > Zn > Cu > Co in. All metal concentrations in the sediments were higher than those in water and fish. Heavy metal accumulation in the sediment was higher in autumn and winter. The highest metal levels were found in the liver and the gill of Cyprinion macrostomum and Capoeta trutta, whereas, lower in the muscle tissue. The average heavy metal concentration in the muscle of Cyprinion macrostomum was higher in the spring and summer, however; was higher in autumn and winter for Capoeta trutta. The metal levels in muscle tissues of the fish were lower than the acceptable values in fish tissues.
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    SIZE AND SHAPE ANALYSIS OF TWO CLOSE CYPRINIDAE SPECIES BY GEOMETRIC MORPHOMETRIC METHODS
    (Parlar Scientific Publications (P S P), 2017) Bilici, Serbest; Kaya, Alaettin; Cicek, Tarik; Unlu, Erhan
    In this study, the differences between C. macrostomus and C. kais species that are similar to each other were investigated in terms of their size (CS) and shape by landmark-based geometric morphometric methods. There was no difference in size between the two species. However, the difference was significant between them in shape. The head of C. macrostomus is longer in height while its dorsal fin is located a bit forward and caudal peduncle is wider compared to C. kais. On the other hand, the body depth of C. kais is greater and its lateral line end is shorter. Considering the geometric morphometric differences, these two species can be identified and distinguished easily.