This study aimed to reconfirm the sex change scale and pattern of Tegillarca granosa. Although the sex ratio (female : male, female proportion) of T. granosa was 1:2.32 (30.2%) at the initial stage (2011) of the study, it was 1:0.94 (51.5%) after one year (2012) in the same population. The increase of the female proportion was greater in the 2+ year class (23.0%) when compared to the 1+ year class (19.2%). Overall, sex change ratio of 37.6% was observed in this population of T. granosa. The sex change ratio of the 2+ year class (39.3%) was higher than that of the 1+ year class (35.3%). And sex change ratio in the males (42.2%) was higher than that in the females (26.9%). The female proportion was the opposite of the result from 2006~2007, and one of the causes was presumed to be the difference in cumulative water temperature during the gonadal inactive stage (winter).

Introduction
Materials and Methods
    1. Specimens
    2. Environmental conditions
    3. Sex change identification
    4. Sex ratio
    5. Histological analysis
    6. Statistical analysis
Results
    1. Environmental conditions
    2. Recovery rate and growth
    3. Change of sex ratio (female : male)
    4. Sex change ratio
Discussion
Acknowledgement
References

• Mi Ae Jeon(South Sea Fisheries Research Institute, National Institute of Fisheries Science, Yeosu 59780, Korea)
• Hyeon Jin Kim(Department of Aqualife Medicine, Chonnam National University, Yeosu 59626, Korea)
• So Ryung Shin(Department of Aqualife Medicine, Chonnam National University, Yeosu 59626, Korea)
• Jung Jun Park(Aquaculture Industry Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science, Gangneung 25435, Korea)
• Hyun Park(Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea)
• Jung Sick Lee(Department of Aqualife Medicine, Chonnam National University, Yeosu 59626, Korea) Corresponding author