The Naiad Fauna of the St.Joseph River Drainage in Southwestern Michigan

Abstract

In view of the decided changes which have occurred in the Naiad fauna of the St. Joseph River drainage due to domestic sewage, industrial wastes, water-power development, and the depletion of the fauna as a result of excessive clamming operations, it seems advisable to summarize the data contributed by other workers, notably Call (1900), Wenninger (1921), and Dolley (1933), and to add data available from my own records. It is unfortunate that no careful survey was made of the fauna before the drainage was subjected to so many detrimental influences. However, though much valuable data will of necessity be lacking, we may still piece together the available information in an attempt to formulate a better knowledge of the fauna.