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Wild dolphins' immune systems are failing because of ocean pollution
Key Excerpts from Article on Website of International Business Times
Posted: May 8th, 2017
http://www.ibtimes.co.uk/wild-dolphins-immune-systems-are-fa...
Wild dolphins are struggling with high levels of mercury and industrial pollution in the oceans off the coasts of Florida and South Carolina. The pollution is putting their immune system on constant alert, which makes it less able to fight off bacteria, fungus, viruses and parasites in the water, according to a study in the journal PLOS ONE. The industrial pollution was strongest in the oceans near Charleston, South Carolina in the US. Organic compounds released into the water accumulate in microorganisms that are eaten by fish, which are in turn eaten by dolphins. The toxins become more concentrated in each step of the food chain. Large amounts of mercury were found in dolphins that live in the Indian River Lagoon. Previous research has shown that the Indian River Lagoon dolphins developed a fungal skin disease because of their suppressed immune systems and new viruses. Some of these are also potentially infectious to humans. By comparison, the dolphins kept in the Georgia Aquarium had fewer diseases and their immune systems were under a lot less stress. This is because the environment at the aquarium is more tightly controlled for water quality. Keeping dolphins in captivity comes with its own impact on the overall health of the mammals. Dolphins are highly intelligent and have complex social structures that can't be maintained in small tanks. As a result, dolphins in captivity live shorter lives than those in the wild.
Note: For more along these lines, see concise summaries of deeply revealing news articles on dolphins and whales from reliable major media sources.
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