Spawning Season of Important Bivalves in Ariake Bay-III

Venerupis semidecussata (Reeve)

Abstract

Venerupis begun to spawn in early March and ceased in early December in 1951, 1952 in Ariake Bay. There are two major periods of spawning during this season; (1) from early to the middle of May and (2) from late October to early November. But the body weight and the number of fat individuals in autumn are lighter and smaller than those in spring.