Pi refers to himself as the next goat which earlier event in this story does this refers to ?

When Richard Parker gets into the boat, Pi sees himself as his next meal..... the sacrificial goat. Thus, he jumps overboard. This is an extension of part 1 ch 8 when father is trying to teach his boys that tigers are dangerous animals. Ravi jokes that Pi will be the next goat the tiger eats.

Ravi was right. Truly I was to be the next goat. I had a wet, trembling, half-drowned, heaving and coughing three-year-old adult Bengal tiger in my lifeboat. Richard Parker rose unsteadily to his feet on the tarpaulin, eyes blazing as they met mine, ears laid tight to his head, all weapons drawn. His head was the size and colour of the lifebuoy, with teeth. I turned around, stepped over the zebra and threw myself overboard.