Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Aggregation in the marine polychaete Cirriformia spirabrancha
Student Author(s): Smith, Dale
Faculty Advisor(s): Lee, Welton
Pages: 27
Location: Final Papers Biology 175H
Date: June 1968
Keywords: Polychaete worm
Abstract: Cirriformia spirabrancha, a marine polychaete, was proven to exist in aggregated densities in two field styd areas located in Monterey Bay, California. The data was gathered by taking cores of the substrate and counting the C. spirabrancha in each sample; this method also proved valuable in determining the density and geographical description of various aggregates. Many environmental factors were eliminated as effectors of aggregation since they were not able to vary significantly in the short distances involved between populations of very high densities (70/80 cm^2) and populations of very low densities. Other environmental variables that could vary with small changes in distances, organic content and particle size, were proven to have no correlation with variations of the worm's population density.