Not AvailableOn the culture ropes in the Vizhinjam Bay brown mussel show an average growth rate of 35 mm per year. In the open sea, mussels on ropes grow to 25 mm in 5 months. The weight increase is 9.29 g/annum in the bay and 9.72 g for 5 months in open sea. The condition index is maximum in August (i.e. before spawning). The spawning lasts from May to September, with a peak in - August.Not Availabl