HEMATOLOGY AND MICRONUCLEI ANALYSIS OF TILAPIA (OREOCHROMIS NILOTICUS) FROM SELOREJO RESERVOIR, NGANTANG, MALANG, INDONESIA

Abstract

The Hematology of Nile tilapia had studied in Selorejo Reservoir as eutrophic reservoir. Hematology of tilapia can be used to detect physiological changes in fish due to environmental changes. This research was conducted from February to March 2019 by using a survey method to determine the hematological structure and micronuclei of tilapia from Selorejo Reservoir. Sampling was carried out 4 times in a week at three different stations. Researcher took 105 fish by using hand line and gill net. The measurement of water quality (temperature, pH, dissolved oxygen and total organic matter) and data analysis, researcher employed the statistical T test of Minitab application. The results of hematology analysis of tilapia indicated that the number of erythrocytes ranged from 1.489.967 – 1.656.658 cells/ mm3; leukocytes ranged from 91.305 – 104.648 cells / mm3; hemoglobin ranged from 9-10 g%; hematocrit ranged from 24,3 – 28,2% and the amount micronuclei ranged from 8,2 to 9,6 cells/1000. It can be stated that the Hematology of tilapia is still within the normal range. Furthermore, the calculation of the hematology T test of tilapia caught with fishing rods and gill net is not significantly different. In addition, the results of water quality parameter’s measurements indicate fine condition for the growth of tilapia; the temperatures range from 27,8 - 28˚C; pH value is 7-8, dissolved oxygen is 7,5 – 8,38 mg /L and Total Organic Matter is 4,78 – 18,33 mg/L. It can be inferred that the hematology and micronuclei of tilapia from Selorejo Reservoir are still within the normal range even though the water reservoir has eutrophic status. Thus, the community and the government are encouraged to monitor the condition of Selorejo Reservoir to maintain fish healthy.

Keywords

• blood fish
• nile fish
• dam
• water quality
• water resource
• management