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Salt water alone unlikely to halt Burmese python invasion
Date:1/4/2012

GAINESVILLE, Fla. -- Invasive Burmese python hatchlings from the Florida Everglades can withstand exposure to salt water long enough to potentially expand their range through ocean and estuarine environments, according to research in the latest issue of the Journal of Experimental Marine Biology and Ecology.

This recent study, based on lab experiments conducted by researchers from the U.S. Geological Survey, provides initial evidence that pythons may be able to survive in marine and estuarine environments such as bays, inlets and open seas. The results raise concerns that the invasive constrictor may invade nearby islands, such as the Florida Keys, said Kristen Hart, a USGS research ecologist and lead author of the study.

"Because reptiles, in general, have poor salinity tolerance, it was hoped that salt water would naturally hinder pythons' ability to expand their range beyond the Everglades," Hart said." Unfortunately, our results suggest salt water alone cannot act as a reliable barrier to the Everglades python population."

Before the study, Burmese pythons had been found in brackish margins of the Everglades, the expansive and predominantly freshwater wetland that is home to the only known wild-breeding population of Burmese pythons in the United States. Yet, no information was available to indicate how long the snakes could persist in saline environments.

The issue of salinity tolerance is critical for understanding the risks of the giant constrictors spreading beyond the Everglades, given the Everglades location on the southernmost end of the South Florida peninsula.

"The fact that this study has ruled out one of the most hoped-for forms of physical barriers, salt water, as preventing the spread of invasive pythons in Florida puts even more onus on human action to prevent the spread of these damaging reptiles," explained USGS director Marcia McNutt. "This study demonstrates the distinct possibility
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Contact: Rachel Pawlitz
rpawlitz@usgs.gov
352-264-3554
United States Geological Survey
Source:Eurekalert

Page: 1 2

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