Effect of Ixtoc I crude oil and Corexit 9527 dispersant on spot (Leiostomus xanthurus) egg mortality

Journal Article · Fri Jan 01 00:00:00 EST 1982 · Bull. Environ. Contam. Toxicol.; (United States)

DOI:https://doi.org/10.1007/BF01669615· OSTI ID:5402638

Slade, G J

A comparison is made of the effects of Ixtoc I crude oil and Corexit 9527 dispersant on the egg mortality of a fish species (spot) occurring in the Gulf of Mexico. Experiments were conducted to (1) determine the effect of the dispersant at various concentrations when added either to sea water alone or the LC/sub 20/ oil-accomodated seawater (OAS), (2) compare the effects of LC/sub 20/ OAS/Corexit (20 ppm) together, and (3) test eggs from time of fertilization of LC/sub 20/ OAS and Corexit (20 ppm), and to LC/sub 20/ OAS alone. The egg stages in the last experiments included blastula, gastrula, and early embryo. Results show that untreated Ixtoc crude, at a dilution of 1 part oil-accomodated seawater to 2.5 parts seawater, is less toxic to L. xanthurus eggs than crude dispersed chemically by Corexit 9527 applied at concentrations greater than 20 ppm. This level is equal to 0.5 U.S. gal/acre, but application of these results as field guidelines should be treated with caution as the experiments did not simulate ocean-oil spill conditions with respect to factors such as depth of the water column, surface agitation, and solar radiation. (JMT)

• Research Organization: Duke Univ., Durham, NC
• OSTI ID: 5402638
• Journal Information: Bull. Environ. Contam. Toxicol.; (United States), Vol. 29
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
02 PETROLEUM
EGGS
MORTALITY
OIL SPILLS
BIOLOGICAL EFFECTS
SYNERGISM
SURFACTANTS
DOSE-RESPONSE RELATIONSHIPS
FISHES
GULF OF MEXICO
PETROLEUM
SEAWATER
WATER POLLUTION
ANIMALS
AQUATIC ORGANISMS
ATLANTIC OCEAN
CARIBBEAN SEA
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION
SEAS
SURFACE WATERS
VERTEBRATES
WATER
560304* - Chemicals Metabolism & Toxicology- Invertebrates- (-1987)
020900 - Petroleum- Environmental Aspects