Hindalco today reported a 13.44% decline in net profit at Rs 300.60 crore for the third quarter ended December 31, 2005 when compared with Rs 347.30 crore in Q3FY05.According to a release issued by the company to the BSE today, total income increased to Rs 2,917 crore inm Q3FY06 from Rs 2,527.10 crore in Q3FY05.