The time and space distribution may be substituted each other, the over laped area was same for Decapterus maruadsi and Pneumatophorus japonicus that related with food competition.

• 蓝圆鲹与鲐鱼群聚区的时空隔离、彼此取代比较明显。蓝圆鲹与鲐鱼的群聚区存在一定的重叠，与其种间对食物的竞争有关。