THEME; Grief
His parents sink along the ship and he can't save them.
On the boat, he sees how the animals eat each others.
When Pi and Richard Parker are back on land, Richard leaves Pi.
THEME; Animals
Pi's father had a zoo, so he grew up among the animals.
On the boat, there are different animals.
The boat floats on the sea. In the sea there are many different types of fish.
THEME; Fear
When the boat sank and he fearly searched for his parents.
He was also afraid, that the animals would eat him.
Fear that he won't survive so many days on sea.
THEME; Adventurous
To survive on a boat, in the middle of the sea, is already pretty adventurous
Secondly, to survive with wild animals on a boat is also adventurous.
To tame Richard Parker, so that he listens to Pi.
Life of Pi, fishbone summary