Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: A preliminary survey of the effects of sewage in the development of echinoderms
Student Author(s): Ott, Susan Marie
Faculty Advisor(s): Epel, David
Pages: 29
Location: Final Papers Biology 175H
Date: June 1970
Keywords: sewage pollution
Abstract: The effects of sewage on sand dollar and sea urchin development were studied. Time required to reach different morphological stages and rate of skeleton growth were used as parameters. Studies were also carried out on culture conditions necessary to reaise embryos beyond the pluteus stage. The development was adversely effected by sewage if the concentration was greater tahn 5% (unchlorinated). A slight enhancement was ofthen observed in 1% sewage, at least during the first 100 hours.