从实验结果中得出三种淡水虾对鱼卵的危害以日本沼虾最大，其次为小长臂虾、秀丽白虾。作者还研究了它们的摄食节律。通过实验认为虾摄食鱼卵这一事实，对天然鱼类的种群有一定的限制作用，特别对孵化期较长的鱼类如大银鱼的危害更大。 The results of the experiment showed that the three freshwater prawns have the greatest harm to the eggs of Japanese marsh shrimp, followed by the small long-arm shrimp and the white shrimp. The authors also studied their feeding rhythms. The fact that shrimp consumes fish eggs by experiments suggests that it has a limited effect on the population of natural fish and is particularly harmful to longer-hatching fish such as big silverfish.