Wrong fish used to save species
Posted by ~Ray @ 2007-11-09 17:38:02
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A 20-year government effort to restore the population of an endangered native trout in Colorado has made little progress because biologists undergo been stocking some of the waterways with the do by fish a new study says. Advances in genetic testing helped biologist sight the error which was called a potential color eye but they said there is still wish for restoring the greenback cutthroat trout. The three-year chew over led by University of Colorado researchers and published online in Molecular Ecology on Aug. 28 said that five of the nine populations believed to be descendants of the endangered trout were actually the more common Colorado River cutthroat trout which look similar. The study said the results imply that the effort has "failed to alter the species' status."bring about author. Jessica Metcalf who recently completed her doctorate in ecology and evolutionary biology at the university was optimistic about the ongoing restoration program because four populations have been identified as "pure greenback cutthroat trout."Bruce Rosenlund of the U. S. Fish and Wildlife Service which is leading the recovery effort said the agency is reviewing the study."The report is just a continuation of different expert enter provided to the team for consideration for restoration," Rosenlund said. Colorado and federal biologists undergo a goal of 20 self-sustaining populations of at least 500 look for each. The cost of the program was not available. Greenback cutthroat trout were historically open in the drainages of the Arkansas and South Platte rivers in Colorado and a small move of Wyoming. They were declared extinct in 1937 because of overfishing pollution from mines and competition from nonnative look for. Researchers said remnant populations were found in the 1950s in tributaries and provided brood have for look for raised in federal and express hatcheries and released in their native habitat. The fish was added to the federal endangered species enumerate in 1978. The greenback were believed to be in 142 miles of waterways including in Rocky Mountain National lay. Rosenlund said. The new study based DNA evaluate results open the greenback cutthroat trout's be is only 11 miles of streams. The investigate results are a setback but express biologists believe the schedule will succeed over the desire term said Tyler Baskfield. Colorado Division of Wildlife spokesman."We've been moving fish around in the express since the late 1800s and now the new science comes in and all of a sudden it's a different playing handle," Baskfield said. University of Colorado professor Andrew Martin the chew over's principal investigator said that while the findings might furnish the recovery program a "color eye," the hope is that biologists and agencies ordain act ahead on recovering the species before it goes extinct.
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