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Title: The use of Ampelisca abdita growth rate as an indicator of sediment quality

Acute lethal bioassays with amphipod crustaceans are routinely used to assess toxicity of bulk sediments. A study within the San Francisco Bay Regional Monitoring Program (RMP) is in progress to develop a chronic bioassay with the amphipod Ampelisca abdita, measuring both survivorship and growth rates. This approach is attractive because depression of growth rate is likely to be a more sensitive indicator of toxic effects than acute lethality, and natural populations of A. abdita exist throughout the Bay. Spiked sediment bioassays, using cadmium and crude oil, were used to demonstrate the relative sensitivity of the standard 10-day lethal test vs. the 30-day growth test. Sediments were also collected from 9 sites throughout the Bay, ranging from areas adjacent to municipal wastewater discharges to areas distant from known point source inputs. These samples were then split, and used for side-by-side comparison of acute (lethal) and chronic (growth) toxicity tests. Survivorship exceeded 90% in all tests, including those sediments collected nearest the wastewater outfalls. Growth rates were contrasted among the various treatments to examine the utility of this end point in discriminating the outfall sites. Data on the spatial distribution, abundance, and size-frequency distribution of native populations was examined within the contextmore » of using growth rate as an indicator of toxic effects in natural populations as well.« less
Authors:
 [1] ;  [2]
  1. Univ. of California, Berkeley, CA (United States)
  2. San Francisco Estuary Inst., Richmond, CA (United States)
Publication Date:
OSTI Identifier:
218427
Report Number(s):
CONF-9511137--
ISBN 1-880611-03-1; TRN: 96:010724
Resource Type:
Conference
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.
Publisher:
Society of Environmental Toxicology and Chemistry, Pensacola, FL (United States)
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; SAN FRANCISCO BAY; WATER POLLUTION; SEDIMENTS; BIOLOGICAL INDICATORS; CADMIUM; TOXICITY; PETROLEUM; CRUSTACEANS; BIOLOGICAL STRESS; ANIMAL GROWTH; POPULATION DYNAMICS