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Post by Carl on Oct 30, 2008 10:14:56 GMT -5
I have nothing to add, but to say thanks to both Jon and Brenda fro the EXCELLENT reads and education, I enjoy learning more (as I have to admit I know little about these fish), and this has been a very educational thread!
Carl
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Post by Carl on Oct 30, 2008 12:46:47 GMT -5
One fascination of Tilapia that others here may or may not be aware of is that it is a major fish of the Salton Sea of California which is a larger saltwater lake near the Mexican border that has come and gone through geologic history. This is an important fisherie both ecologically and for sport and I have always found it an interesting case study in fish adaptation as only the pup fish can truly claim native status. Many of the fish are from the Ocean Waters off the coast of Baja CA. such as the Corvina that have adapted to the high fluctionating salinity (often over 25% of the ocean) as well as extreme temperatures from high tropical temperatures to low interior winter temperatures. Also Oxygen levels fluctuate widely. In this mix is the Tipalia that found its way from introduction of nearby rivers and these fish have managed to survive the increasing salinity, and temperature extremes. Please reference these articles: www.sci.sdsu.edu/salton/BiolResponsetoSalinityAppG.htmlAnd this site: www.saltonsea.ca.gov/thesea.htmCarl
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