The study, conducted by U.S. and Mexico researchers seeks to encourage other countries to follow suit.
The boat arrived in the Pacific port of Quetzal on Wednesday and planned to stay five days.
As part of the sanctions, the U.S. government has frozen the assets of five limited liability companies in Florida owned by Lopez.
The trio covered 12-18 miles per day, making their way among the islands of Livington, Greenwich, Barrientos, Robert, Nelson and King George.
Holt is being held in a prison run by Venezuela's intelligence police, which also holds a number of activists that the opposition considers political prisoners.
In total, there were 1,938 homicides in January, up 34 percent from 1,442 in the same month last year.
The decision was made public last week by TV Globo, which created the luscious icon 26 years ago.
The government of Raul Castro accused the top diplomat of involvement in anti-Cuban activities.
Mexican authorities identified the man as Guadalupe Olivas Valencia, 44, and said he had been deported from the U.S. three times.
Hector Arenas Saucedo is wanted on criminal conspiracy and drug charges in the United States, the AG's office said.