The data are the typical dry weight in mg, the typical ingestion rate (weight of food intake per day for one animal) in mg/day, and the percentage of the food that is composed of organic matter for 19 species of deposit feeders. The goal is to see whether the distribution of species' ingestion rates depends on the percentage of organic matter in the food, after accounting for the effect of species weight and to describe the association.
A data frame with 19 observations on the following 4 variables.
a character variable with the name of the species
the dry weight of the species, in mg
ingestion rate in mg per day
percentage of organic matter in the food
Ramsey, F.L. and Schafer, D.W. (2013). The Statistical Sleuth: A Course in Methods of Data Analysis (3rd ed), Cengage Learning.
Cammen, L. M. (1980) Ingestion Rate: An Empirical Model for Aquatic Deposit Feeders and Detritivores, Oecologia 44: 303–310.