Evaluation of reproduction as an endpoint in chronic toxicity tests with the amphipod Hyalella azteca
- NBS, Columbia, MO (United States)
In 1994, USEPA published ``Methods for Measuring the Toxicity and Bioaccumulation of Sediment-associated Contaminants with Freshwater Invertebrates`` (EPA/600/R-94/024). Within that document a Hyalella azteca 10-d survival test for sediments is described. The 10-d survival test provides a measure of acute toxicity from moderately to highly contaminated sediments. In addition to survival, growth during the 10-d test can be measured and could be a more sensitive endpoint. However, the ecological significance of reduced growth is questionable. Reproduction may be a more sensitive endpoint than growth or survival and its ecological importance is not questionable. The objective of this research is to develop a Hyalella azteca sediment toxicity test with a reproductive endpoint. The reproductive test will closely resemble the 10-d test but will be longer in duration and may require isolation of amphipods from the sediment for reproduction. Presently, reproductive effects of different diets and water types have been evaluated. A preliminary test protocol has been developed and is being tested and refined. This presentation will provide the most current results of this ongoing research. This study will be used to develop standard methods for measuring chronic toxicity in sediments using Hyalella azteca.
- OSTI ID:
- 218420
- Report Number(s):
- CONF-9511137-; ISBN 1-880611-03-1; TRN: IM9619%%141
- Resource Relation:
- Conference: 2. Society of Environmental Toxicology and Chemistry (SETAC) world conference, Vancouver (Canada), 5-9 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Second SETAC world congress (16. annual meeting): Abstract book. Global environmental protection: Science, politics, and common sense; PB: 378 p.
- Country of Publication:
- United States
- Language:
- English
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