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        Authorities in Hawaii are proposing a ban on the popular tourist activity of swimming with dolphins off the Hawaiian coast. The dolphins have __46__ as a magnet for tourists over the past few decades. However, federal officials say the increasing tourism is __47__ to the dolphins because they are supposed to be resting and socializing. The National Marine Fisheries Service proposes to prohibit swimming with, or approaching within 50 meters of, Hawaii’s spinner dolphins. That would put an end to many tour group activities, which involve sailing alongside the __48__ in a boat and snorkeling with them. Ann Garrett, a spokeswoman for the National Marine Fisheries Service, said she didn’t think the ban would have a big impact __49__ the tourist trade in Hawaii. Tour operators __50__ with Ms. Garrett’s assessment. They warned that it would be the end of legitimate dolphin swimming in this area. Dolphins typically are most active at night and sleep and relax during the day, which is when the tourists interact with them.