R Dataset / Package Stat2Data / SeaSlugs
On this R-data statistics page, you will find information about the SeaSlugs data set which pertains to Sea Slugs. The SeaSlugs data set is found in the Stat2Data R package. You can load the SeaSlugs data set in R by issuing the following command at the console data("SeaSlugs"). This will load the data into a variable called SeaSlugs. If R says the SeaSlugs data set is not found, you can try installing the package by issuing this command install.packages("Stat2Data") and then attempt to reload the data with the library() command. 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 SeaSlugs R data set. The size of this file is about 307 bytes.
Sea Slugs
Description
Metamorphose rates for sea slugs exposed to different water samples
Format
A dataset with 36 observations on the following 2 variables.
Time | Minutes after tide come in |
Percent | Proportion of 15 sea slug larvae that metamorphose |
Details
Sea slugs, common on the coast of southern California, live on vaucherian seaweed. The larvae from these sea slugs need to locate this type of seaweed to survive. A study was done to try to determine whether chemicals that leach out of the seaweed attract the larvae. Seawater was collected over a patch of this kind of seaweed at 5-minute intervals as the tide was coming in and, presumably, mixing with the chemicals. The idea was that as more seawater came in, the concentration of the chemicals was reduced. Each sample of water was divided into 6 parts. Fifteen larvae were then introduced to this seawater to see what percentage metamorphosed (an indication that the desired chemical was detected).
Source
Data downloaded from http://www.stat.ucla.edu/projects/datasets/seaslug-explanation.html
References
A paper based on these data: Krug, P.J. and R.K. Zimmer. 2000b. Larval settlement: chemical markers for tracing production, transport, and distribution of a waterborne cue. Marine Ecology Progress Series, vol. 207: 283-296.
Dataset imported from https://www.r-project.org.
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