In Australia and California they are seeing a sharp increase in shark attacks, and there have been many theories as to why this is occurring. A prominent Australian marine biologist believes that sharks may now be actually targeting humans as a source of food.
Dr Scoresby Shepherd believes that over fishing has caused a decline in the numbers of fish such as tuna that have previously made up a large part of the sharks’ diets. And what happens when a shark can’t eat what he wants? He eats something else. From the interview:
My speculation is that if the natural prey is decreasing, then they're more likely to be hungrier than they were before. And so they may be well be turning their attention to whatever else is available.Perhaps it’s even more insidious than that. Perhaps the sharks are cognizant of the fact that we’re responsible for the decline in their favorite foods and are doing what they can to eliminate their competition. Gun-toting dolphins don’t sound like such a bad idea now, do they?