Common Namea

Species

Exposureb (h)

Endpointc

Hardy heads (juvenile), F

Atherinosoma microstoma

96

LC50

Australian bass (larvae)

Macquaria novemaculeata

96

LC50

Algae

Diatom

Skeletonema costatum

72

EC50

Brown alga (zygotes), F

Phyllospora comosa

48

EC50

Bacteria

Microtox™

Vibrio fisheri

0.25

EC50

aF: field collected.

bSD: spiked, declining exposure (107 min half-life).

cEC50: concentrations causing effect in 50% of test organisms; LC50: concentration causing mortality in 50% of test organisms; NOEC: no effect concentration.

dMeasured values.

eListed as Gulec et al 1994 in George-Ares and Clark (2000).

fUpdated entries not provided in George-Ares and Clark (2000).

FIGURE 5-3 Comparison of the LC50s derived from spiked exposures of water accommodated fractions (WAF), chemically enhanced water accommodated fraction (CEWAF), and dispersants using either fresh crude oil (Kuwait, Forties, Prudhoe Bay, and Venezuela), weathered-crude oil (Arabian medium) or fresh Medium Fuel Oil, and Corexit 9500 or Corexit 9527. LC50s were based on initial concentrations of total petroleum hydrocarbons.

SOURCE: Data are from Clark et al. (2001); Fuller and Bonner (2001); and Wetzel and Van Fleet (2001).



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement