Some observations on the clam beds of Kali Estuary, Karwar

S.N. Harkantra

Abstract



Observations on ecology, growth spawning periodicity and other biological features of hard clam Meretrix casta (Chemnitz) in the Kali Estuary, Karnataka, India have been reported. Dense clam beds have been found in sandy deposits. The average growth was 2.9 mm per month. Seasonal variations in the growth has been observed and are correlated to the changes in temperature and salinity. Spawning period is prolonged with a break in winter. Increase in shell weight is much faster than any other linear dimensions. Possibilities of migration of adult clams to deeper waters have been postulated

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