Even after almost twenty years of studying dolphin-human interactions, seeing them in the wild still remains an incomparably exquisite experience. Dolphin and whale watching is certainly not a new phenomenon, and, when done in moderation, can occur responsibly. Here in Washington, we are fortunate in that we can even view orcas from land (especially on San Juan Island).
But recently, it's become more common to see boaters and swimmers descending upon wild dolphins in droves around the world. The formalization and commercialization of programs making dolphins more accessible to the public allows for unprecedented opportunities to watch, feed, touch, and swim with them. Examples of this can be found all over the world, from the tropics to the arctic.
Japan provides a particularly paradoxical example, where dolphin swimming tours can be found on one side of the bay while dolphins are killed by fishermen on the other.
In New Zealand, interactions are typically much more benign. Nonetheless, dolphins are being harmed by the tens of thousands of people every year who attempt to swim them. Biologist Dr. Rochelle Constantine has found that over the years, the bottlenose dolphins in the Bay of Islands have been interacting with swimmers less and avoiding them more.
Another researcher, Dr. David Lusseau, recently found that an entire population of dolphins is being threatened by the numerous tourist boats that come to see them in Milford Sound, also in New Zealand. He documented that dolphins are being injured and killed by the boats, and up to seven percent of them bear visible scars from boat collisions.
Closer to home in Hawaii, it has become very popular to swim with spinner dolphins. Signs are displayed which describe the federal laws prohibiting close approach to these animals, but few people follow them.
The United States' Marine Mammal Protection Act has among the strictest provisions. The laws protecting marine mammals from harassment (intentional or otherwise) from humans carry both civil and criminal penalties for violations: the maximum civil penalty is $10,000 and the maximum criminal penalty is $20,000 and one year in jail.
However, these laws are rarely enforced, and new regulations are in the making that may improve protection for dolphins from human harassment.
Although some people view them as invasive impediments to their communication with the dolphins, in reality, these laws attempt to protect the dolphins from excessive invasion from humans. People from around the world come to Hawaii to swim with the dolphins in the more protected and shallow bays. Dolphins have apparently relied upon these bays for millennia for important activities such as resting, nursing, and birthing because they provide relative protection from sharks.
However, biologist Anna Forest has found that the dolphins in one of the most popular bays, Kealakekua, are using the bay for shorter periods of time each day. The dolphins spend about 25% fewer days in the bay now than before swimmers and kayakers began to invade their periods of rest in the early 1980s. Some swimmers say that this change cannot be solely attributed to people. However, when combined with other compelling evidence, a disturbingly blatant global trend in dolphin harassment and even death emerges.
Two years ago, the International Whaling Commission formally addressed the impact of human swimmers on free-ranging dolphins for the first time. For this purpose, I conducted a review of the subject. That review made it clear that dolphins exhibiting the highest degree of contact with humans are at the greatest risk of injury, illness, or death from people. Even the most well-intentioned interactions with dolphins pose serious risks to dolphins.
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