Simplify the following text for a Grade 11 native English-speaking person.
Original: A survey conducted in 2005 reported that there were 13 wolf packs , totaling 118 individuals in Yellowstone and 326 in the entire ecosystem .
Simplified: A survey conducted in 2005 showed there were 13 wolf packs , totaling 118 individuals in Yellowstone and 326 in the whole ecosystem .