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U.S. Fish change sex

January 21 2007
12:05

Potomac River, flowing through Washington, contaminated chemicals capable of altering the sex of fish and animals. The river flows in the state of West Virginia. The study of fish discovered a number of chemicals, including pesticides, flame retardants and household chemicals.

The researchers examined 30 individuals perch from six sites, including male and female specimens without hermaphroditism and male animals - hermaphrodites. In all samples, including specimens without hermaphroditism was found at least one substance that violates the work of the endocrine system, according to U.S. Geological Survey.

Such a substance is disrupting the hormonal system and cause birth defects and genital abnormalities, called hermaphroditism and act on all animals - from frogs and fish to man. In a report last year's office also pointed to very high levels of antibiotics in municipal wastewater.

In sluzhberasskazali, they found abnormalities in sexual development of fish by chance in 2003 when they investigated the mass death of fish. According to scientists, in the southern tributaries of the Potomac and Cacapon gets a lot of wastewater.

Basically - this is runoff from agricultural, domestic waste water (both treated and untreated), industrial effluents and waste water containing chemicals, which process the field against the gypsy moth, in particular, Dimilin (diflubenzuron), the report said, the AP.

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