On this Picostat.com statistics page, you will find information about the nitrofen data set which pertains to Toxicity of Nitrofen in Aquatic Systems. The nitrofen data set is found in the boot R package. You can load the nitrofen data set in R by issuing the following command at the console data("nitrofen"). This will load the data into a variable called nitrofen. If R says the nitrofen data set is not found, you can try installing the package by issuing this command install.packages("boot") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the nitrofen R data set. The size of this file is about 715 bytes.

Toxicity of Nitrofen in Aquatic Systems

Description

The nitrofen data frame has 50 rows and 5 columns.

Nitrofen is a herbicide that was used extensively for the control of broad-leaved and grass weeds in cereals and rice. Although it is relatively non-toxic to adult mammals, nitrofen is a significant tetragen and mutagen. It is also acutely toxic and reproductively toxic to cladoceran zooplankton. Nitrofen is no longer in commercial use in the U.S., having been the first pesticide to be withdrawn due to tetragenic effects.

The data here come from an experiment to measure the reproductive toxicity of nitrofen on a species of zooplankton (Ceriodaphnia dubia). 50 animals were randomized into batches of 10 and each batch was put in a solution with a measured concentration of nitrofen. Then the number of live offspring in each of the three broods to each animal was recorded.

Usage

nitrofen

Format

This data frame contains the following columns:

conc

The nitrofen concentration in the solution (mug/litre).

brood1

The number of live offspring in the first brood.

brood2

The number of live offspring in the second brood.

brood3

The number of live offspring in the third brood.

total

The total number of live offspring in the first three broods.

Source

The data were obtained from

Bailer, A.J. and Oris, J.T. (1994) Assessing toxicity of pollutants in aquatic systems. In Case Studies in Biometry. N. Lange, L. Ryan, L. Billard, D. Brillinger, L. Conquest and J. Greenhouse (editors), 25–40. John Wiley.

References

Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.

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Dataset imported from https://www.r-project.org.