Fingered Poison Frogs are endemic to Trinidad. Females deposit small clutches of eggs in terrestrial nests. After hatching in July, one of the parents
transports the tadpoles to a small water body, where they complete their
development to metamorphosis.
Suppose that due to changing climate conditions small bodies of water are
only readily available during certain months of the year. In Southern
Trinidad, water bodies are only present during the spring months (April and
May) and in Northern Trinidad small bodies of water are only available
during the fall (September October). What type of pattern of natural
selection would we expect to see in Trinidad's Fingered Poison Frog
population with respect to time of reproduction?