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    Confirmed Occurrence of Caligus mugilis Brian (Copepoda, Siphonostomatoida; Caligidae) with Morphological Characters in Turkish Marine Waters
    (Springer International Publishing Ag, 2017) Alas, Ali; Oktener, Ahmet
    The aim of this study is to determine Caligus mugilis including morphological characters on Mugil cephalus from BandA +/- rma Bay in Turkey. The flathead grey mullet, Mugil cephalus were examined for the ectoparasites in 2016. Caligus mugilis Brian, 1935 (Copepoda, Siphonostomatoida, Caligidae) is confirmed for the first time in Turkish marine waters. Also, some morphological characters of this parasitic copepod are described. All parasites were firmly attached to the gill filaments of the host. Parasite prevalence, mean intensity and mean abundance were 9.3%, 1, 0.09, respectively. It should be noted that Caligus mugilis was reported by some researcher in 1989, however there was uncertainty about the occurrence of Caligus mugilis in Turkey. This controversial issue is cleared with this study.
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    Detection of the of Effects of Hexavalent Chromium by Histopathological and Electrophoretic Methods on Capoeta capoeta (Guldenstaedt 1773) and Squalius cephalus (Linnaeus 1758)
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2013) Koc, Evren; Yilmaz, Muhitdin; Ersan, Yusuf; Alas, Ali
    In this study, effects of hexavalent chromium (CrVI) (as potassium dichromate) on Capoeta capoeta and Squalius cephalus obtained from Kars Creek were investigated by histopathological and electrophoretic methods. Fish were adapted into the medium for 10 days. Then three groups were made in which for each fish species ten fish were included. The fish in the 1st group were held in normal water, 2nd and 3rd groups were held in the water containing 10 mg/L CrVI, respectively for 10 and 20 days. At the end of this period, tissue and blood samples were taken. These samples were analyzed subsequently. After histopathological examination occasional necrosis, hydropic and vacuolar degenerations in liver of the fish were found which were exposure to 10 mg/L CrVI. An increase in the level of degeneration was observed in the livers tissues of the experimental fish groups in parallel to the increase of the duration. In SDS-PAGE of serum proteins, compared to control, slight thickening of some protein bands were detected in the Capoeta capoeta exposed to CrVI for 10 days. There were no significant changes in protein bands of Squalius cephalus. Thinning of some protein bands and a significant thickening of some protein bands in the Capoeta capoeta. Slight thickening of some protein bands were detected in the Squalius cephalus exposed to hexavalent chromium for 20 days. In exposure to depending on the time of hexavalent chromium on Capoeta capoeta and Squalius cephalus, it is concluded that liver tissue and serum protein expressions of these fish were increasingly degenerated.
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    Determination of heavy metal contents in some freshwater fishes
    (Springer, 2014) Mert, Ramazan; Alas, Ali; Bulut, Sait; Ozcan, Mehmet Musa
    The concentrations of heavy metals in tench, pike-perch, and common carp fish caught in four different seasons from Damsa dam lake (NevAYehir) were determined. Heavy metal contents of fishes changed depending on seasons. The highest Al (20.894 mg/kg) in tench was established in winter, and the lowest Al (1.605 mg/kg) was determined in summer. Fe content of tench fish changed between 112.906 mg/kg (autumn) and 31.207 mg/kg (spring). In addition, Zn contents of tench were found between 36.0323 mg/kg (summer) and 430.586 mg/kg (winter). The results indicate that concentrations of Cu of tench varied from 0.1934 mg/kg (winter) to 15.422 mg/kg (autumn). Results indicate that concentrations varied from 2.923 mg/kg (autumn) to 32.078 mg/kg (summer) with a mean of 11.1893 mg/kg for Al; 0.2483 mg/kg (spring) to 3.3088 mg/kg (autumn) with a mean of 1.6189 mg/kg for Ni; 0.5325 mg/kg (spring) to 0.845 mg/kg (autumn) with a mean of 0.7234 for Pb; and 7.0464 mg/kg (winter) to 253.686 mg/kg (summer) with a mean of 133.6348 for Zn. In common carp, Al, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn, Se, Ga, and Te contents were determined as 3.9623 mg/kg; 0.1293, 0.2336, 0.0526, 0.1543, 4.2406, 0.726, 1.797, 0.6216, 6.8536, 0.1783, 0.7876, and 0.371 mg/kg in autumn, respectively.
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    Effect of urea concentration on microbial Ca precipitation
    (Elsevier Science Inc, 2012) Isik, Mustafa; Altas, Levent; Ozcan, Samet; Simsek, Ismail; Agdag, Osman Nuri; Alas, Ali
    High calcium concentrations are problematic, because they lead to clogging of pipelines, boilers and heat exchangers through scaling, or malfunctioning of aerobic and anaerobic reactors. Urea hydrolysis provides simultaneously a pH and CO2 increase, both of which are responsible of CaCO3 production. This study was carried out to determine urea concentrations between 5 and 20 mM on ureolytic mixed culture treating synthetic wastewater. The optimum urea concentration was found as 15 mM for effective calcium removal. This work showed the feasibility of urea-based microbial carbonate precipitation as an alternative Ca2+ removal technology. (C) 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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    Mineral contents of the head, caudal, central fleshy part, and spinal columns of some fishes
    (Springer, 2014) Alas, Ali; Ozcan, Mehmet Musa; Harmankaya, Mustafa
    In the experiment, mineral contents of the head, caudal, central fleshy part, and spinal columns of fishes were determined by inductively coupled plasma atomic emission spectrometry. The Ca content of base fleshy part ranged from 1,682 to 5,505 mg/kg. The Ca contents of central fleshy part were found between 104 and 428 mg/kg. This value was found between 5,582 and 7,368 in the spinal column parts. The K content in general ranged from 2,411 (Carassius gibellio) and 4,419 mg/kg (Scomber scombrus). The highest potassium was found on the central fleshy part and ranged between 3,214 and 4,419. The P content was found mostly on the bones and it range between 28,833 and 34,726. The least phosphor amount was found on the central fleshy part. While the Cd content ranges between 0.019 ppm and 0.104 mg/kg, Cr content changed between 1.32 and 4.20 ppm.
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    Redescription of Elthusa sinuata (Koelbel, 1879) Comb.Nov (Isopoda, Cymothoidae) Parasitizing the Red Bandfish in Turkey
    (Springer International Publishing Ag, 2018) Oktener, Ahmet; Trilles, Jean Paul; Kocabas, Engin; Inceoglu, Hasim; Alas, Ali
    Livoneca sinuata Koelbel, 1879 (Isopoda, Cymothoidae) is known from the Mediterranean Sea. In this study, this species is redescribed and transferred to the genus Elthusa according to the current status of this: body weakly twisted, antennula shorter than antenna, posterior margin of cephalon not trilobed, pleonite 1 slightly narrower than pleonite 2, maxilliped with oostegital lobe and pleopods all lamellar, without lobes or folds. This species was collected on the red bandfish, Cepola macrophthalma, and reported for the first time in the Sea of Marmara, Turkey. The species is also photographed for the first time on the host.
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    A Study on the Trophic Status and Phytoplanktonic Algae of Mamasin Dam Lake (Aksaray-Turkey)
    (Central Fisheries Research Inst, 2012) Atici, Tahir; Alas, Ali
    This study was carried out between April, 2002 and April, 2003 at four stations in Mamasin Dam Lake in the Central Part of Anatolian Region of Turkey. Sixty phytoplanktonic algal taxa were recorded at these stations. These were consisting of species belonging to divisions of Ochrophyta (=Bacillariophta), Chlorophyta, Charophyta, Cyanobacteria and Euglenozoa. Generally, members of Ochrophyta group were dominant in the lake. Some physical and chemical water quality parameters were determined and these were related with chlorophyll-a values.