Final answer:
Juana's specific prayer in the canoe is not detailed in the given texts, but it is likely a plea for safety and survival similar to individuals in other perilous narratives.
Step-by-step explanation:
The main answer to what Juana prays for while in the canoe is not directly stated in the provided texts. However, we can infer from the context of similar narratives that individuals in dire situations often pray for salvation, protection, or assistance. An explanation for Juana's prayer might involve seeking divine intervention to ensure safety and survival, as reflected in the passages which illustrate people in threatening circumstances turning to prayer in hopes of deliverance.