Consider the following statements regarding the ecological significance of the Himalayan ibex and blue sheep in the Lahaul & Spiti district:

1. The Himalayan ibex and blue sheep are major prey of snow leopards.

2. The population of snow leopards has decreased due to the decline in the numbers of blue sheep and Himalayan ibex.

3. The increase in the population of Himalayan ibex and blue sheep has led to a boost in wildlife tourism in Lahaul & Spiti.

How many of the statements given above is/are correct?