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Title: Developmental arrest in grass shrimp embryos exposed to selected toxicants

Excised embryos of the grass shrimp (Palaemonetes pugio) were exposed to single pulse concentrations of selected pollutants for 4 days. The following toxicity endpoints were monitored: rate of embryonic development, embryo mortality, and types of embryo malformation. Each endpoint exhibited concentration--response relationships which were modified by the embryonic age at which exposure commenced. Developmental retardation of up to 3 days was effected by phenol at 0.01% (V/V) and complete developmental arrest occurred at 0.05% and 0.1% (V/V). Similarly for methylene chloride, developmental retardation of 1003 days were observed at 0.1% (V/V) depending on the age of the embryos at the start of the tests. The morphological abnormalities of the embryos are described. The ecological significance of these findings and implications for the development of short-term toxicity tests using grass shrimp embryos are discussed.
Authors:
 [1]
  1. Morgan State Univ., Baltimore, MD (United States). Dept. of Biology
Publication Date:
OSTI Identifier:
320943
Report Number(s):
CONF-9704249--
Journal ID: ISSN 1071-720X; TRN: IM9910%%133
Resource Type:
Conference
Resource Relation:
Conference: 7. symposium on toxicology and risk assessment: ultraviolet radiation and the environment, St. Louis, MO (United States), 7-9 Apr 1997; Other Information: PBD: 1998; Related Information: Is Part Of Environmental toxicology and risk assessment: Seventh volume; Little, E.E.; DeLonay, A.J. [eds.] [Geological Survey, Columbia, MO (United States)]; Greenberg, B.M. [ed.] [Univ. of Waterloo, Ontario (Canada). Dept. of Biology]; PB: 427 p.; ASTM special technical publication, Volume 1333
Publisher:
American Society for Testing and Materials, West Conshohocken, PA (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; WATER POLLUTION; BIOLOGICAL INDICATORS; SHRIMP; PHENOL; CHROMIUM; METHYLENE CHLORIDE; EMBRYOS; BIOASSAY; CELL DIFFERENTIATION; MORPHOLOGICAL CHANGES