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http://www.msnbc.msn.com/id/6253193
Okay, I thought that the Potomac had been fairly well cleaned up. Now we have a large percentage (79% in one check) of the male smallmouth population producing eggs. A large part of the region's water is supplied by the Potomac. -- Frank Reid Reverse Email to reply |
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Frank Reid wrote:
http://www.msnbc.msn.com/id/6253193 Okay, I thought that the Potomac had been fairly well cleaned up. Now we have a large percentage (79% in one check) of the male smallmouth population producing eggs. A large part of the region's water is supplied by the Potomac. Similar thing happening near Denver. http://www.denverpost.com/Stories/0,...442899,00.html Willi |
#3
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Frank Reid wrote:
http://www.msnbc.msn.com/id/6253193 Okay, I thought that the Potomac had been fairly well cleaned up. Now we have a large percentage (79% in one check) of the male smallmouth population producing eggs. A large part of the region's water is supplied by the Potomac. -- Frank Reid Reverse Email to reply I can't find the link now, but a similar thing was found on the Columbia River in the Hanford Reach. I heard about it on an odd show on NPR with a women talking about the pseudo hormones introduced in water from polycarbonate containers. Her claim was that some complex molecules were introduced in the 1 PPB consentration range, and they were causing what was called a sex change in some of the Chinook (18% IIRC). The chromosomes identified the fish as male, but they developed eggs instead of milt. The lady claimed that people would have troubles with the same chemicals and we shouldn't drink water from polycarbonate bottles, particularly if the plastic was heated anywhere near boiling. I never managed to cross verify this one, so I forgot about it. Chas remove fly fish to reply http://home.comcast.net/~chas.wade/w...ome.html-.html San Juan Pictures at: http://home.comcast.net/~chasepike/wsb/index.html |
#4
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Frank Reid wrote:
http://www.msnbc.msn.com/id/6253193 Okay, I thought that the Potomac had been fairly well cleaned up. Now we have a large percentage (79% in one check) of the male smallmouth population producing eggs. A large part of the region's water is supplied by the Potomac. -- Frank Reid Reverse Email to reply I can't find the link now, but a similar thing was found on the Columbia River in the Hanford Reach. I heard about it on an odd show on NPR with a women talking about the pseudo hormones introduced in water from polycarbonate containers. Her claim was that some complex molecules were introduced in the 1 PPB consentration range, and they were causing what was called a sex change in some of the Chinook (18% IIRC). The chromosomes identified the fish as male, but they developed eggs instead of milt. The lady claimed that people would have troubles with the same chemicals and we shouldn't drink water from polycarbonate bottles, particularly if the plastic was heated anywhere near boiling. I never managed to cross verify this one, so I forgot about it. Chas remove fly fish to reply http://home.comcast.net/~chas.wade/w...ome.html-.html San Juan Pictures at: http://home.comcast.net/~chasepike/wsb/index.html |
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