Effects of Dichlorvos on Goldfish Feeding Behavior

This paper deals with the changes of feeding behavior of goldfish exposed to different concentrations of dichlorvos and to the normal water for fifteen days respectively. The results show that, 1) The higher concentrations of dichlorvos, the longer the first feeding strike time of goldfish, the lower the feeding frequency and the later the feeling spike occurs. This indicated that the learning and memory of goldfish are decreased with the increase in dichlorvos concentrations which restrain goldfish from feeding behavior. 2) After removing dichlorvos poisoned goldfish into clean water for fifteen days, the above mentioned indexes recovered to some extent.