The review of published literature and research reports revealed limited data for a few warmwater fish species concerning the impacts of suspended solids and sediments on reproductive success. Laboratory and field studies during the 1930-50s examined direct mortality as the result of extremely high levels of suspended solids. Controversy ensued in the 1940-60s over the impacts of turbidity on fish populations in the Great Lakes and midwestern rivers. There was substantial evidence that reproductive behavior was variously affected by suspended solids and sediment relative to spawning time, place of spawning, and spawning behavior. The more adaptively successful species reproductive activities were not carried on at times of highest turbidity. Fishes with complex patterns of reproductive behavior are more vulnerable to interference by suspended solids at a number of critical behavioral phases during the spawning process. Incubation stage is particularly susceptible to adverse effects from sediment.

Includes bibliographical references (pages 78-95). USEPA contract no. Contract Number: CC80741-J