Abstract

• The spawning period of blood cockle Tegillarca granosa was studied by using the histological analysis of the gonads. Five maturity stages of gonads were noticed as the immature, developing, mature, spawning, and spent stages. The spawning period was from July to February with high in November and December. Males and females attain maturity in the same period. The observed mean length at first maturity was 29mm total length in males and 31mm in females. The number of females was predominant than males. Sexual dimorphism could not be noticed in species of Tegillarca granosa.