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 22 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. The last three species
happen to be Bivalves, so may behave differently from the others.