Links from the magazine

Tagging Reveals Details of Tuna's Transatlantic Travels.
http://www.sciam.com/article.cfm?
articleID=000D8B99-A296-1C60-B882809EC588ED9F&pageNumber=1&catID=1
New research is revealing the true scope of the tuna's wanderlust. A report on a study by Stanford University researcher Barbara A. Block.

Chemical Clues in Salmon's Bony Tissues Provide Natural Tag for Tracking
http://www.sciam.com/article.cfm?
articleID=00065888-507E-1C60-B882809EC588ED9F&pageNumber=1&catID=1
Nature has a built-in tagging system for Atlantic salmon that yields more information than conventional identification systems do, according to new findings presented at a meeting of the Ecological Society of America.

Sex Changed Salmon
http://www.sciam.com/article.cfm?
articleID=00048294-882C-1C6A-84A9809EC588EF21&pageNumber=1&catID=1
A report in the journal Environmental Health Perspectives, suggests that in chinook salmon spawning in the Columbia River, 84 percent of fish that appeared to be female have been 'sex-reversed' and are in fact genetically male.

Running The Dam Gauntlet
http://www.sciam.com/article.cfm?
articleID=000185D4-533D-1C75-9B81809EC588EF21&pageNumber=1&catID=2
Every year recently spawned salmon, steelhead trout and other fish make their way down the Columbia River, on the Oregon-Washington state border. As they do, they attempt to run a sometimes lethal gauntlet of six to eight hydroelectric dams. In the name of science, a rubber fish serves as stunt double.

Ask the Experts
http://www.sciam.com/askexpert_question.cfm?
articleID=000B9991-6E9C-1C72-9EB7809EC588F2D7&catID=3
Why do some fish normally live in freshwater and others in saltwater? How can some fish adapt to both?