Information is scarse about the population structure of this species. According with Pedersen (1994) the individuals sex ratio is generally 1:1 and they become sexually mature from 30 to 55 mm shell height at ages 4–9 years.  There are small differences in shell height-at-agebetween males and females, but between area means vary from 58 to 68 mm at age 10 years. Seasonal and areal variations in both the muscle and gonad weights can be observed.