Johnson and Raven (1973) have presented data giving the number of species and related variables for 29 different islands in the Galapagos Archipelago.
This data frame uses the island name as row labels and contains the following columns:
Number of Species
Number of endemic species (orrur only on that island)
Surface area of island, hectares
Area of closest island, hectares
Distance to closest island, km
Distance from Santa Cruz Island, km
Elevation in m, missing values given as zero
1 if elevation is observed, 0 if missing
Johnson, M.P., and Raven, P.H. (1973). Species number and endemism: The Galapagos Archipelago revisited. Science, 179, 893-895.
Weisberg, S. (2005). Applied Linear Regression, 3rd edition. New York: Wiley, Problem 10.8.