抄録
This paper describes the vertical and horizontal distributions and transport from offshore to coastal area of a prawn Penaeus japonicus, postlarvae collected in Kumihama Bay and its adjacent area from April to October, 1984.
The postlarvae distributed abundantly in surface waters shallower than 10m depth and coastal area compared with offshore area in day and night time. The appearence of the postlarvae in a channel was mainly during high tide at night, and in the Kumihama Bay they were abundant in the water with salinity more than 28‰ near channel in night tlme. Advanced stage of the post-larvae is collected abundantly in Kumihama Bay, compared with the offshore area.
The above results suggest that the postlarvae may be transported from the offshore waters to shallow waters with high tide in night time as growth proceeds.
