Intersex Fish Showing Up in Pennsylvania Rivers

Stop Making Sense

Megan Gannon reports for Live Science:

A smallmouth bass‘Scientists found intersex fish in three river basins in Pennsylvania, a sign that the water may be tainted with chemicals from human activity.

Male smallmouth bass with female characteristics — namely, immature egg cells in their testes — were discovered in the drainage areas of the Susquehanna, Delaware and Ohio rivers, according to a new study led by the U.S. Geological Survey (USGS).

Such abnormalities are linked to estrogen-mimicking chemicals, which likely got into rivers and streams from agricultural runoff and human waste, the researchers said.’

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