Abstract
This study aimed to confirm sex change in Tegillarca granosa to determine whether this species is a sequential hermaphrodite. Samples of bivalves were divided into two groups, namely, a 1+ year class (14 months) and a 2+ year class (26 months), for analysis. At the beginning of the study, 44.3% of T. granosa were female, and after one year, this increased to 53.9% in the same population. The increase of females in the population was greater in the 1+ year class (12.3%), when compared with the 2+ year class (6.5%). Overall, a sex change ratio of 15.1% (n = 104/688) was recorded for T. granosa. The sex change ratio of the 1+ year class (17.8%) was higher than that of the 2+ year class (12.1%), and displayed the tendency of being higher in the males (21.2%), than the females (6.2%). The results of this study indicate that T. granosa is a sequential hermaphrodite.
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Acknowledgments
We would like to thank three anonymous reviewers for suggestions that improved the manuscript.