Diminished interest in travel to Mexico because of continued violence there has persuaded the cruise lines to pull out of that region in favor of more desirable and profitable destinations like Australia. Several of the ships also no longer make stops in Mazatlan because of recent attacks there.

By Lori Weisberg Friday, May 6, 2011
http://www.signonsandiego.com/news/2011/may/06/cruises-mexican-riviera-likely-end-2012/