DANCE

Lunev Is Staying: Soviet dancer Aleksandr Lunev, who stunned Boston audiences with his soaring leaps in the glasnost “Swan Lake” this month, is joining the Boston Ballet for the 1990-91 season. Lunev, disenchanted with the opportunities he was receiving from his home Kirov company in Leningrad, landed in Boston in early April with just the clothes on his back. He quickly was signed to dance major roles in the historic Soviet-American “Swan Lake” collaborative production, which ended Sunday.