2013 Cilt 7 Sayı 21

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Effects of cadmium and cadmium-chitosan mixture on some blood parameters of oreochromis niloticus
(Uludağ Üniversitesi, 2013-11-25) Çiftçi, Nuray; Özbay, Teslime; Karayakar, Fahri; Cicik, Bedii; Ay, Özcan; Karaytuğ, Sahire
Effects of 1 mgL chitosan(CT) mixture on hematocrit levels, erythrocyte numbers and on erythrocyte and erythrocyte nucleus areas were determined after exposing the animals to Cd and Cd-CT mixture over 7, 15 and 30 days. Microhematocrit and microscopic methods were used in determining the above blood parameters. No mortality was observed during the experiments. Hematocrit levels and erythrocyte numbers decreased whereas erythrocyte and erythrocyte nucleus areas increased in fish exposed to Cd alone compared with the control. No difference was observed, however, in the parameters studied in Cd-CT exposed fish compared with the control, except the erythrocyte nucleus area (P<0.05). When exposed to Cd alone erythrocyte and erythrocyte nucleus areas increased and hematocrit levels and erythrocyte numbers decreased whereas when exposed to Cd-CT mixture there was no difference in hematocrit levels, an increase in erythrocyte numbers and a decrease in erythrocyte and erythrocyte nucleus areas with increasing exposure periods. Blood parameters of O. niloticus were not affected when exposed to Cd together with chitosan, while exposing fish to Cd alone resulted changes in these parameters.