Salamander metamorph body size data

Columns indicate: Date = the date of metamorphosis, Day = the day of the experiment, Tank = the experimental tank, Block = the experimental block, Treatment = the experimental treatment, Density = the categorical overall density, Mole = the number of mole salamanders (Ambystoma talpoideum), Spotted = the number of spotted salamanders (Ambystoma maculatum), Species = the species of salamander (talp = Ambystoma talpoideum; mac = Ambystoma maculatum), SVL = metamorph snout-vent length (in cm), and Mass = metamorph mass (in grams).