Correlation between Water Quality to Blood Glucose of Cantang Grouper ( E. fuscoguttatus x E. lanceolatus) as an Indicator of Stress in Floating Net Cage

Abstract

Cantang grouper is one of economical commodities in seawater and profitable in the resource fisheries sector. One of cultivation systems for Cantang Grouper is Floating Net Cage. Changes in water quality can cause stress in fish, can be seen in blood glucose value. This study aims to determine the correlation and water quality factors that influence to glucose level of kerapu cantang fish in floating net cage. This research was using a survey method with samples 10% of the population in 3 units of floating net cages with 4plots. The parameters are blood glucose of cantang grouper and water quality. Data analysis using SPSS ver.22 with linear regression test.The results showed water quality factors simultaneously has a strong correlation and influences to blood glucose of cantang grouper in floating net cage with linear equations Y = 1170,248 + 1639,818(X1)-1010,567(X2) + 17,093(X3)-39,998(X4)-127,117(X5) + 23,691(X6)-15,418(X7) + 0,257(X8) + 225,965(X9). Y = Glucose; X1 = NO2; X2 = NO3; X3 = NH3; X4 =Dissolved Oxygen; X5 = pH; X6 = Temperature; X7 = Salinity; X8 = Transparancy; X9 = Current. Therefore, current, pH, and dissolved oxygen are the influences to blood glucose of cantang grouper in floating net cage.