Chlorophyll is determined spectrophotmeterically following hot extraction method (Mackinney, 1941) using 95% methanol and absorbance is taken at 650 and 665 nm. The absorbance for carotenoids and phycobiliproteins is read spectrophotmeterically at 450, and 562, 615 and 652 nm following Jensen (1978) and Bennett and Bogorad (1971) respectively.