daphnia {nlreg} | R Documentation |
‘Daphnia Magna’ Data
Description
The daphnia
data frame has 136 rows and 2 columns.
Ecotoxicity study to assess the impact of the herbicide dinoseb on the survival of Daphnia magna Strauss, 1820, a micro-crustacean widely used as test organism in aquatic ecotoxicological assays. The design of the experiment includes 35 irregularly spaced concentrations ranging from 0.006 to 11.3 mg/l and a control group. The upper endpoint of 11.3 mg/l is the highest concentration at which the test substance is soluble in the test medium. The number of replicates per concentration varies from 1 to 11 experimental units. The survival time is measured in days.
Usage
data(daphnia)
Format
This data frame contains the following columns:
conc
-
the tested concentration (mg/l);
time
-
the survival time in days.
Source
The data were obtained from
Ch\'evre, N. (2000) Etude et mod\'elisation des effets \'ecotoxiques d'un micropolluant organique sur Daphnia magna et Pseudokirchneriella subcapitata (in French). Ph.D. Thesis N. 2117, Department of Rural Engineering, Swiss Federal Institute of Technology Lausanne.
References
Brazzale, A.R. (2000) Practical Small-Sample Parametric Inference. Ph.D. Thesis N. 2230, Department of Mathematics, Swiss Federal Institute of Technology Lausanne. Section 5.3, Example 5.
Ch\'evre, N., Becker-van Slooten, K., Tarradellas, J., Brazzale, A. R., Behra, R. and Guettinger, H. (2001) Effects of dinoseb on the entire life-cycle of Daphnia magna. Part II: Modelling of survival and proposal of an alternative to No-Observed-Effect-Concentration (NOEC). Environmental Toxicology and Chemistry, 21, 828–833.
Examples
data(daphnia)
attach(daphnia)
plot(conc, time, xlab = "test concentration (mg/l)",
ylab = "survival time (d)", log = "y")
detach()