title: Sex Ratio and Sex Reversal in Two-year-old Class of Oyster, Crassostrea gigas (Bivalvia: Ostreidae).
abstract: The sex ratio (F:M) in the same population of oyster, Crassostrea gigas at the commencement of the study (2007) was 1:1.0, but changed to 1:2.8 by the end of the study (2008). The sex reversal rate in two-year-old oysters was 40.2%. Specifically, female to male sex reversal rate was 66.1%, which is higher than the male to female sex reversal rate of 21.1%. The sex reversal pattern of C. gigas appears to go from male⇒female⇒male, and as such is determined to be rhythmical hermaphroditism.
authors.affiliation: Aquaculture Management Division, Aquaculture Research Institute, NFRDI, Busan 619-902, Korea.
authors.forename: Jung Jun
authors.initials: JJ
authors.lastname: Park
authors.affiliation: Dept. of Aqualife Medicine, Chonnam National University, Yeosu 550-749, Korea.
authors.forename: Hyejin
authors.initials: H
authors.lastname: Kim
authors.affiliation: Gyeongsangnam-do Fisheries Resources Research Institute, Tongyeong 615-118, Korea.
authors.forename: Seung Wan
authors.initials: SW
authors.lastname: Kang
authors.affiliation: Biotechnology Research Division, Aquaculture Research Institute, NFRDI, Busan 619-902, Korea.
authors.forename: Cheul Min
authors.initials: CM
authors.lastname: An
authors.affiliation: Dept. of Green Life Science, Sangmyung University, Seoul 110-743, Korea.
authors.forename: Sung-Ho
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Dept. of Life Science, College of Natural Sciences, Hanyang University, Seoul 133-791, Korea.
authors.forename: Myung Chan
authors.initials: MC
authors.lastname: Gye
authors.affiliation: Dept. of Aqualife Medicine, Chonnam National University, Yeosu 550-749, Korea.
authors.forename: Jung Sick
authors.initials: JS
authors.lastname: Lee
keywords: Crassostrea gigas; Rhythmical hermaphroditism; Sex reversal; Two-year-old class