Intersex in Fish
Posted by Sidney Draggan on September 16th, 2009
According to U.S. Geological Survey (USGS) research published online in Aquatic Toxicology, “Intersex in smallmouth and largemouth basses is widespread in numerous river basins throughout the United States. This is the major finding of the most comprehensive and large-scale evaluation of the condition.
Of the 16 fish species researchers examined from 1995 to 2004, the condition was most common by far in smallmouth and largemouth bass: a third of all male smallmouth bass and a fifth of all male largemouth bass were intersex. This condition is primarily revealed in male fish that have immature female egg cells in their testes, but occasionally female fish will have male characteristics as well.
Scientists found intersex fish in about a third of all sites examined from the Apalachicola, Colorado, Columbia, Mobile, Mississippi, Pee Dee, Rio Grande, Savannah, and Yukon River basins. The Yukon River basin was the only one where researchers did not find at least one intersex fish.”
I am amazed at how little we still know about the animal kingdom. I bet there are plenty more cool things to discover just like the intersex in Small and large mouth bass.
Very interesting article.
Jan
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# November 23rd, 2009 5:38 pmwow our science has developed so much past few years,
i’m exiceted to know what els we would find in the future.
Nice Read.
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# January 16th, 2010 5:33 pmSays:
Now Science and technology are on peak these days. I think some day we will have a new bread of Humans as well.
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# January 19th, 2010 7:52 am