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Effect of linear alkylbenzene sulfonate on population growth of Daphnia galeata : A life table evaluation
Author(s) -
Tanaka Y.,
Nakanishi J.
Publication year - 2001
Publication title -
environmental toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.813
H-Index - 77
eISSN - 1522-7278
pISSN - 1520-4081
DOI - 10.1002/tox.1042
Subject(s) - population , linear alkylbenzene , toxicology , chemistry , biology , biochemistry , demography , sociology , pulmonary surfactant
The chronic effect of linear alkylbenzene sulfonate (LAS 12 ) on a daphnid species ( Daphnia galeata ) was examined by the life table experiment. The estimated responses in the intrinsic rate of population growth r were analyzed with two alternate concentration–response functions, i.e., the power function and the quadratic function. Based on the best‐fit power function model with biases corrected by the jackknife procedure, the population‐level EC 50 , which is defined as the concentration of chemicals that reduces the population growth rate (the intrinsic rate of natural increase) by 50%, was estimated as 2.5 mg/L. The 48‐h acute immobility test yielded EC 50 of 4.6 mg/L. The population‐level effect of LAS 12 on this test species is considerably more sensitive than the acute lethal effects to neonates. © 2001 John Wiley & Sons, Inc. Environ Toxicol 16: 344–348, 2001