Studies on seasonal changes and latitudinal differences in the metazoan fauna of the shiner perch, Cymatogaster aggregata, along the west coast of North America

The results of studies to assess seasonal changes and to determine latitudinal differences in the parasite fauna of Cymatogaster aggregata are presented. Certain elements of this fauna show significant seasonal fluctuations and others show distributional patterns that appear to assume an orientation based on geography. Some factors that may be involved in determining such fluctuations and patterns are discussed.