Abstract
In the Yatsushiro Sea, the harmful algae Chattonella antiqua red tides is becoming a major threat to the fishing industry, with damages exceeding 10 billion yen. In this study, CCA was used to determine the relationship between the growth of C.antiqua and factors of the water quality environment. Factors involved in the growth of C.antiqua include degree of stratification, O2 saturation of bottom water, water temperature, DIN/SiO2-Si and DIN/PO4-P were raised. The fact that the degree of these factors differs in areas where outbreak occurs could be clarified. From now, the factor extraction technique by CCA is expected to be effectively applied for development of a prediction model for red tide using the HSI model, etc.
