Correlation between water quality with prevalence of black tiger shrimp (Penaeus monodon) infested by ectoparasite protozoa in traditional ponds of Wonorejo, Surabaya

This research is intended to know the prevalence of black tiger shrimp (Penaeus monodon) were infested with ectoparasites protozoa and correlation with water quality in traditional ponds Wonorejo Surabaya. The method of this research is survey method with simple random sampling at five different locations ponds. The main parameters observed was the prevalence of ectoparasites that infested black tiger shrimp (Penaeus monodon). The supporting parameters was observed water quality parameters included pH, temperature, DO, salinity, brightness and ammonia content. The results of research showed that the prevalence of black tiger shrimp (Penaeus monodon) infested by protozoa ectoparasite in traditional ponds subdistrict Wonorejo Surabaya was 16.67% included in the category often. Correlation was shown indicated in the parameters of temperature, ammonia content and turbidity, that the higher the temperature, the ammonia content and turbidity, the higher the prevalence of black tiger shrimp (Penaeus monodon) infested by protozoa ectoparasite. Correlation was shown in the parameters of dissolved oxygen and pH, that the lower the dissolved oxygen and pH the higher the prevalence of black tiger shrimp (Penaeus monodon) infested by protozoa ectoparasite. Parameter salinity did not show any correlation because the correlation coefficient of R = 0.064, less the correlation coefficient (R) of less than 0.2.