Gökkuşağı Alabalığı (Oncorhynchus mykiss Walbaum, 1972) Yumurtalarının Dezenfeksiyonunda Kullanılan Bazı Kimyasal Maddelerin Kuluçka Parametrelerine Etkileri

Özet

In this study, the effects of different concentrations of some chemicals (methylene blue, iodine and formalin) that are used as disinfection to prevent fungal infection were examined during hatching stage of rainbow trout (Oncorhynchus mykiss Walbaum, 1972) eggs. Three different concentrations of methylene blue (5, 10, 20 mg/L), iodine (2, 4, 8 mg/L) and formalin (2, 4, 8 ml/L) together with control were carried out. Three replicates for each concentration and control group were provided. A hundred eyed eggs were used for each replicate.At the end of experiments, mean mortality rate in control groups was found 12% until swim up stage. Nearly 10% in egg stage and 2% in larvae stage of this were observed. The lowest mortality rate in the egg stage was observed as 5% in group treated with 4 ml/L concentration of formalin.The lowest mortality rate in larval stage was observed as 0.3% in group treated with 20 mg/L concentration of methylene blue and as 0.67% in group treated with 2 ml/L concentration of formalin.In conclusion, it was determined that the use of 4 ml/L concentration of formalin in egg stage and the use of 20 mg/L concentration of methylene blue and 2 ml/L concentration of formalin in larval stage was applicable for disinfection of rainbow trout eggs and larvae.