Not that there's anything wrong with that?: Researchers suggest that trace amounts of CO2 may feminize southern Alberta fish

Gender-bending fish on the rise in southern Alberta

"The situation for native fish will likely get worse as the concentration of organic contaminants will become more concentrated as a response to climate change and the increase in human and animal populations," adds Jackson.
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Researchers tested a native minnow, longnose dace (Rhinichthys cataractae), and found that at nearly every site, 14 out of 15 locations, males showed elevated levels of a protein, hepatic vitellogenin, which is normally only found in the blood of females and is used by females to produce eggs.