|Document Type:||Chapter or Section|
|Type of Book:||Technical|
|Section or Chapter Title:||Sublethal and lethal effects in two marine organisms, a juvenile echinoderm and a larval fish, exposed to contaminated sediments|
|Book Title:||Oceans '89: an international conference addressing methods for understanding the global ocean. 18-21 September 1989, Seattle|
|Author:||Edmundo Casillas, David A. Misitano, P. D. Plesha, Douglas D. Weber, C. R. Haley, S. Demuth, Michael H. Schiewe, Sin Lam Chan, U. Varanasi|
|Publisher:||Institute of Electrical and Electronics Engineers, New York|
In this preliminary report, we describe two new bioassy systems for assessing sediment toxicity and report the relative sensitivity of mortality and impaired growth as indicators of toxicant effects on the test organisms. In these bioassays, juvenile sand dollars (Dendraster excentricus) and larval surf smelt (Hypomesus pretiosus) were exposed to serially diluted sediments from three urban areas with different types and levels of contamination. Physical and biochemical measures of growth (i.e., length or diameter, DNA content, and protein content) were then evaluated for dose-responsiveness and sensitivity and compared with mortality as biological indicators of toxicant effects.