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    Comparison of the proximate compositions and fatty acid profiles of gilthead sea bream (Sparus aurata) and sole (Solea solea)
    (Asian Journal Of Chemistry, 2008) Ersoy, Beyza; Celik, Mehmet; Yanar, Yasemen; Kuecuelguelmez, Ayguel; Sanguen, Levent
    Seasonal changes in the proximate composition and fatty acids of gilthead sea bream (S. aurata) and sole (S. solea) were investigated. The fish species (S. aurata and S. solea) analyzed were fairly high in protein (20.41-22.63%). The highest lipid levels of gilthead sea bream were found in September and December. However the lipid levels of sole displayed fluctuations according to months with the highest values in September. The percentages of EPA and DHA of gilthead sea bream were between 3.86-4.59 and 5.96-19.64%, respectively, according to the months. However, The EPA and DHA of the sole were also found 2.17-2.94 and 6.33-10.99%, respectively. The ratios of n-3/n-6 PUFA content indicating the availability of n-3 PUFA that are beneficial for human health were 8.06, 18.97, 6.45 for gilthead sea bream and 5.53, 6.46, 6.65 for sole in December, April, September, respectively. The results of this study show that the consumption of gilthead sea bream and sole could meet this demand in terms of n-3 PUFA contents and the effects on health..
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    Effects of season on proximate and fatty acid compositions of two mediterranean fish - the round herring (Etrumeus teres) and tub gurnard (Chelidonichthys lucernus)
    (Wiley-Blackwell, 2010) Kucukgulmez, Ayguel; Celik, Mehmet; Ersoy, Beyza; Yanar, Yasemen
    P>The aim of this work was to study the seasonal variation of the proximate and fatty acid compositions in the round herring (Etrumeus teres) and tub gurnard (Chelidonichthys lucernus) caught from the North-Eastern Mediterranean Sea. Proximate compositions and fatty acid contents of both fish species showed statistically significant seasonal variations (P < 0.05). While the protein contents were at its highest in winter, the lipid contents were at its highest in autumn. The main fatty acids were C16:0 (palmitic acid), C18:0 (stearic acid), C16:1 n-7 (palmiteoleic acid), 18:1 n-9c (oleic acid), C20:5 n-3 (eicosapentaenoic acid) and C22:6 n-3 (docosahexaenoic acid). The total polyunsaturated fatty acid in round herring was highest in winter, whereas that in tub gurnard was highest in spring.
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    The essential and toxic elements in tissues of six commercial demersal fish from Eastern Mediterranean Sea
    (Pergamon-Elsevier Science Ltd, 2010) Ersoy, Beyza; Celik, Mehmet
    The essential elements and contaminants (Pb and Cd) were determined seasonally in the muscle and liver of six demersal fish species Sparus aurora, Chelidonichthys lucernus, Upeneus molluccensis, Solea solea, Merluccius merluccius and Saurida undosquamis from the Iskenderun Bay, Eastern Mediterranean Sea. The concentrations in muscles of fish species were 474-1534 mg/kg for Na, 574-3374 mg/kg for K, 72.7-496 m/kg Ca, 94.1-210 mg/kg for Mg. Muscle accumulated the lowest levels of elements. Trace element and contaminant levels in muscle were highest in the spring and winter. The Cu and Ni concentrations were highest in the winter. The Zn, Cr and Fe concentrations were highest in the spring. The maximum Pb concentrations in the muscle and liver of fish species was 0.58 and 0.89 mg/kg (wet wt) in the autumn. The maximum Cd concentration in the muscle and liver tissues of fish was 0.20 mg/kg and 0.63 mg/kg (wet wt) in the winter. The Cr, Pb, Cd, Cu and Zn levels in muscle were found to be lower than permissible limits. Estimated weekly and daily intake for Pb and Cd was far below the PTWI and PTDI values. The consumption of these species from this region is not problem on human health. (C) 2010 Elsevier Ltd. All rights reserved.
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    Essential elements and contaminants in tissues of commercial pelagic fish from the Eastern Mediterranean Sea
    (Wiley, 2009) Ersoy, Beyza; Celik, Mehmet
    BACKGROUND: It is important to determine the concentrations of essential and non-essential metals in fish for human health. The essential elements and contaminants (Pb and Cd) were determined seasonally in the muscle and liver of some pelagic fish species round herring (Etrumeus teres), chub mackerel (Scomber japonicus), golden grey mullet (Liza aurata) and Mediterranean horse mackerel (Trachurus mediterraneus) from the Iskenderun Bay, Eastern Mediterranean Sea. RESULTS: The Na, K, Ca and Mg were the most abundant elements in muscle and liver tissues. The Na, K, Ca and Mg concentrations in fish tissues were between 51.7 and 3426 mg kg(-1). Muscle accumulated the lowest levels of elements. Trace element and contaminant levels in muscle were highest in spring and summer. The Cu, Zn and Cr concentrations were highest in summer. The Ni, Mn and Fe concentrations were highest in spring. The maximum Pb concentrations in the muscle and liver of fish species was 0.39 and 0.80 mg kg(-1) in autumn. The maximum Cd concentration in the muscle of fish was 0.27 mg kg(-1) in spring and the maximum Cd concentration in the liver was 0.78 mg kg(-1) in summer. CONCLUSION: The Cr, Pb, Cd, Cu and Zn levels in muscle were found to be lower than permissible limits reported by various authorities. Estimated weekly and daily intake for Pb and Cd by consumption of fish muscle were far below the PTWI and PTDI values established by FAO/WHO. (C) 2009 Society of Chemical Industry
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    RESEARCH NOTE: A COMPARISON OF THE CHEMICAL COMPOSITION OF ZANDER (SANDER LUCIOPERCA) LIVING IN DIFFERENT LAKES OF TURKEY
    (Wiley, 2009) Oksuz, Abdullah; Kucukgulmez, Ayguel; Diler, Abdullah; Celik, Mehmet; Koyuncu, Esra
    In the present work, the proximate compositions, minerals and trace element contents of zander (Sander lucioperca) caught from two lakes (Beysehir Lake and Seyhan Dam Lake) of Turkey were compared. There were significant differences between moisture and lipid contents, although there were no statistically significant differences between crude protein and ash contents. The mineral and trace elements determined were Na, K, Ca, P, Mg, Zn, Cu, Fe, Pb and Se. Although Na and Fe contents of zanders in two different lakes were different from each other (P < 0.01), we found no statistically significant differences in terms of Mg, Ca, P, Cu, Pb, Se, Zn contents (P > 0.01). Among the minerals analyzed, K was the highest followed by P, Ca, Na and Mg. The most abundant trace elements were Zn, Fe, Cu, Se followed by Pb, and these elements were below the limits proposed by Turkish Food Codes for human consumption in the meat of zander.