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Titel (primär) Influence of duration of exposure to the pyrethroid fenvalerate on sublethal responses and recovery of Daphnia magna straus
Autor Reynaldi, S.; Liess, M.;
Journal / Serie Environmental Toxicology and Chemistry
Erscheinungsjahr 2005
Department OEKOTOX;
Band/Volume 24
Heft 5
Sprache englisch;
Keywords Pulse exposure; Toxicant; Population growth rate; Recovery; Daphnia magna
Abstract This study compares lethal and sublethal responses of Daphnia magna Straus exposed to fenvalerate continuously (21 d) and as a pulse (24 h). Survival was reduced more severely in the continuous- than in the pulse-exposure regime. Complete mortality occurred at 1 μg/L for continuous exposure and at 3.2 μg/L for pulse exposure. Regarding reproductive endpoints, fenvalerate delayed the age at first reproduction. At the beginning of the reproductive phase (day 10), this delay resulted in a reduction of the neonates per living female at similar concentrations in both exposure regimes (0.3 and 0.1 μg/L for continuous and pulse exposure, respectively). The population growth rate was inhibited in continuous and pulse exposure at 0.3 and 0.6 μg/L, respectively. However, the effects of fenvalerate in the pulse exposure were transient. After 21 d, a recovery to values close to the controls occurred with respect to the total neonates per female and the population growth rate over a broad range of concentrations from 0.1 up to 1 μg/L. In contrast, no substantial recovery occurred in the continuous-exposure regime.
ID 3714
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=3714
Reynaldi, S., Liess, M. (2005):
Influence of duration of exposure to the pyrethroid fenvalerate on sublethal responses and recovery of Daphnia magna straus
Environ. Toxicol. Chem. 24 (5), 1160 - 1164