Differences between visual backgrounds and predator visual systems on detection of

Information is provided for you below that will help you construct an answer for your interpretation of the figures on page 2-3.
Background: Dendrobates pumilo is a poison dart frog with a distributional range from Nicaragua, Costa Rica, and Panama. The bright colors from the skin of these frogs are considered to be a warning sign of toxicity to predators. Although D. pumilo is one species, there are 10 color polymorphic populations within this range. The warning signs as displayed on D. pumilo are favored by natural selection in terms of predator avoidance.
Purpose of the study (what scientists wanted to understand):
1)  How visual conspicuousness and toxicity is correlated.
2)  Differences between visual backgrounds and predator visual systems on detection of D.
pumilo.
Glossary:
Dorsal: upper side or back
Ventral: underside