نسرین حسن زاده

Increasing the production of agricultural products and cultivating high-yielding cultivars requires the indiscriminate use of pesticides to kill pests and insects that damage agricultural products and thus help to improve the quantity and quality of crops. Pesticides enter aquatic ecosystems through runoff, spraying, washing and subsurface drainage and pose a serious threat to the ecosystem due to their long shelf life, high toxicity, contamination of living organisms, presence in the food chain and accumulation in living organisms. they are going. Pesticides in aquatic ecosystems lead to severe damage to some physiological and biochemical processes and reduced growth rate, metabolic and reproductive disorders as well as histopathological changes in gills, liver, hematopoietic tissues, spleen, kidney, endocrine tissues and It also causes brain, nervous, and behavioral disorders in fish and other aquatic species. Exposure of aquatic organisms to pesticides in the long run means a constant health risk for residents. Therefore, directly and indirectly, the human population is at high risk from consuming poisonous fish species. This indicates the need to take precautionary measures in the use of pesticides to protect aquatic communities. In this paper, an attempt has been made to review the studies describing the toxicity of pesticides, to present the dangers of their presence in the ecosystem of aquatic organisms.