What is one method for assessing the impact of pesticides on non-target aquatic organisms?

Conducting bioassays or toxicity tests is a fundamental method for assessing the impact of pesticides on non-target aquatic organisms. This approach involves exposing organisms, such as fish or invertebrates, to various concentrations of the pesticide and observing the effects on their health, behavior, and survival rates. The results can help determine the toxicity of a pesticide and identify potential risks to non-target species in the aquatic ecosystem.

Bioassays provide direct evidence of a chemical's impact on living organisms in controlled settings, enabling researchers and applicators to gauge the potential harm that could occur in natural water bodies. By comparing the effects of pesticide exposure against control organisms not exposed to pesticides, scientists can effectively evaluate the safety of pesticides for non-target species and make informed decisions regarding their usage in aquatic environments.

In contrast, other options like marketing surveys, pellet distribution analysis, and market price evaluation do not provide relevant data on the ecological impacts of pesticides on aquatic organisms, as they focus on market trends or product distribution rather than the biological effects on non-target species.