UC San Diego Library – Scripps Digital Collection

The Delta Fish and Wildlife Protection Study was organized in 1961 to investigate the effects of future water development on fish and wildlife resources dependent upon the Sacramento-San Joaquin River estuary, and to recommend measures to protect and enhance these resources. The investigations described in this bulletin were designed to answer a number of specific questions relevant to water development plans and also to start us toward an understanding of the estuary's ecology. The bulletin describes the results of about 2 years of collecting and 1 year of analysis on zooplankton, zoobenthos, and fishes of the middle or bay portion of this estuary and on zooplankton and zoobenthos of the upper portion that is known as the Delta.