Considerations in Conducting Bioassays.
Abstract
Many types of tests can be considered as forms of bioassay. The broad range of substrate types, chemical composition, geographical locations, and equipment used in dredging adds to the complexity of formulating a single bioassay procedure applicable to all dredging programs. A discussion of the bioassay principles and techniques in the literature are presented to provide a background for an understanding of aquatic bioassay testing. Aquatic bioassays, which were developed from pharmacological drug testing techniques, often encounter complex toxicity problems. Two or more toxic compounds may be acting together or the toxicant concentration may fluctuate. The techniques used in aquatic testing may vary depending on the type of toxicant tested and the environmental parameters, such as temperature or dissolved oxygen, that need be controlled. Toxicant dosing equipment varies with the type of test species, source of water, and type of toxicant in question. Static bioassays are generally performed in glass jars or commercial aquarium tanks. Continuous-flow equipment consists of a reservoir of toxicant water which is metered into the test vessel. Extensive elaboration of the equipment has led to multiple toxicant delivery systems capable of providing a range of concentrations. The two most widely used delivery systems are the serial diluter and proportional diluter.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1978
- Accession Number
- ADA057203
Entities
People
- David R. Rosenberger
- Edward Long
- Elaine Farbenbloom
- Raymond Bogardus
- Robert Hitch