Anomalies in hydropsychid capture nets from polluted streams

摘要: 1Members of the genus Hydropsyche, net-spinning caddisfly larvae, exhibit anomalies in structure their capture nets when collected from stream localities receiving heavy metal and toxic chemical wastes. 2The number showing was positively correlated with per net suggesting a graded response to wastes. 3Frequency hydropsychid population increased closer were pollution source. Anomaly frequency negatively total macroinvertebrate community as measured by Shannon function. It is suggested that anomaly frequeney hydropsychids may be useful tool ecological monitoring.