Yazar "Duysak, Önder" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim
    Öğe
    The determination of body size and eggs number of Zooplankton (Rotifera, Cladocera and Copepoda) in Tahtaköprü dam lake (Gaziantep, Turkey)
    (2016) Bozkurt, Ahmet; Ülgü, Mitat; Duysak, Önder
    Çalışma, Tahtaköprü Baraj Gölü'nde Mart 2007-Şubat 2008 tarihleri arasında yürütülmüştür. Çalışmada rotifer, kladoser ve kopepod boy uzunluğu ve yumurta sayısı aylık olarak araştırılmıştır. Rotifer, kladoser ve kopepod türlerinin yıllık ortalama boy uzunluğunun soğuk kış mevsiminde yüksek, sıcaklığın kısmen yüksek olduğu sonbaharda ise düşük olduğu belirlenmiştir. Rotifer türlerinin yumurta miktarları en çok şubat ayında (1,79±1,030 adet), en az aralık ayında (1±0 adet) belirlenmiştir. Kladoser yumurta miktarları sıcak yaz aylarında çok (ağustos, 2,09±1,014 adet), soğuk kış aylarında ise az miktarda (şubat, 1,20±0 adet) olduğu tespit edilmiştir. Kopepod yumurta miktarı aralık ayında en çok (80,67±1,154 adet), ekim ayında ise en az (14,75±3,594 adet) olduğu tespit edilmiştir
  • [ N/A ]
    Öğe
    Heavy metal concentrations in tissues of short-finned squid Illex coindetii (Cephalopoda: Ommastrephidae) (Vérany, 1839) in Iskenderun Bay, North-Eastern Mediterranean
    (University of Punjab (new Campus), 2015) Duysak, Önder; Dural, Meltem
    Metal levels (Cd, Cr, Cu, Fe, Mn, Pb and Zn) in the gill, digestive gland, arm and mantle of female and male short-finned squid (Illex coindetii) in Iskenderun Bay were investigated. All elements differed in accumulation in tissues and sex significantly (p<0.05). Concentrations of Cd in the tissues of male and female shortfinned squid samples ranged between 0.68-9.51 ?g/g. Cu concentrations in all tissues were found and ranged between 5.97 and 324.1 ?g/g. Fe concentrations in the mantle of female and male samples were found 9.13 and 9.83 ?g/g, respectively. Pb concentrations in the mantles of female and male samples were found between 1.49-2.37 ?g/g. The highest Zn concentrations in hepatopancreas of male and female samples were found 85.29 and 66.8 ?g/g respectively (P<0.05). In the mantle tissue of I. coindetii, metal levels independent of sex were in the following order: Zn > Cu > Fe > Pb > Mn > Cd > Cr. In accordance with limit values, the present study found out that the mantle tissue of cuttlefish, I. coindetii, was overlimited with Cd and Pb. Copyright © 2015 Zoological Society of Pakistan.
  • Küçük Resim
    Öğe
    Metal concentrations in different tissues of cuttlefish (sepia officinalis) in İskenderun Bay, northeastern mediterranean
    (2013) Duysak, Önder; Ersoy, Beyza; Dural, Meltem
    Metal levels (Cd, Cr, Cu, Fe, Mn, Pb and Zn) in the gill, hepatopancreas, ovary, testis and mantle of male and female cuttlefish Sepia officinalis in İskenderun Bay were investigated. All elements differ in accumulation in tissues and sex significantly (p<0.05). Concentrations of Cd in the tissues of male and female cuttlefish samples ranged between 0.12-34.7 mg/kg. Cr levels in tissues of males and females ranged between 0.59-1.26 mg/kg. Cu concentrations in all tissues were found and ranged between 8.83 and 1296 mg/kg. Fe concentrations in the mantle of female and male samples were found 0.35 and 0.36 mg/kg, respectively. Pb concentrations in the mantles of female and male samples were found between 1.74-1.79 mg/kg. The highest Zn concentrations in hepatopancreas of male and female samples were found 181 mg/kg and 272 mg/kg respectively (P<0.05). In the mantle tissue of S. officinalis, metal levels independent of sex were in the following order: Cu>Zn>Cd>Pb>Cr>Mn>Fe. In accordance with limit values, the present study found out that the mantle tissue of cuttlefish, S. officinalis, was overlimited with Cd and Pb.