Abstract
The reproduction and oxygen consumption of Turbo (Batillus) cornutus were studied in specimens collected monthly between March, 1999 and April, 2000 in Chikura, Chiba Prefecture, Japan. Gonadal histology, gonadal index and oocyte diameter were used to determine the reproductive cycles and spawning period for both sexes. Oxygen consumption and ammonia excretion were measured to estimate metabolism. The reproductive cycle was annual, with the peak activity in the late summer. Oxygen consumption and ammonia excretion increased linearly with increasing soft body weight and showed an annual cycle in connecting with gonadal maturation cycle.
