 Wysłany: Sob 13:00, 20 Lis 2010 Temat postu: pumas-60Texas Pumas Rescue Florida Panthers Big |
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| Regardless, the cats were obviously healthier, as evidenced by their improved ability to climb trees when pursued by scientists, and through data from the rigorous genetic and physical evaluations researchers had carried out on nearly 600 cats starting back in the late 1970s.
On the frontier of extinction less than two decades ago, the Florida panther has regained strength and numbers with the help of some big Texan cats, according to new research. Of procedure, Florida is still far from a safe cat haven. Panthers have nearly saturated the available habitat, noted O'Brien, and the current 100 or so adult panthers remain just a fractionion of the number needed for a sustainable population. However, Packer added, no one can be entirely sure if the population boost was solely due to this improved genetic vim. While the Florida and Texas cats were mingling, for example, more habitat was chance up due to all sorts of conservation measures, and wildlife underpasses were being constructed to abate the risk of vehicle strikes. Panthers' endangered pals Meanwhile, the challenges are only going to obtain tougher for the American cats, suggested Packer. "At the same time that they were relocating cougars from Texas to Florida, the state of Montana had raised its hunting quotas on the cats to a phenomenally high level," he said. ? "We know who everyone's father is," O'Brien said. "We know their offspring, genetic heritage, clinical grade, who survived and who didn't. All these things were not guesstoil." In 1995, researchers decided on a bold stsizegy. They would bring in eight females from a Texas population thin a hurry shared the Florida panthers' gene pool, but could no longer make it past the freesteps of Jackson, Mobile and Gainesville to mate. Then they would watch and wait. After dramatic habitat reduction and hunting in the late 1800s and throughout the 20th century, Florida panther populations eventually plummeted to the point where so few of the cats existed that inbreeding followed. Serious genetic-related health troubles ensued, including heart defects, poor-quality sperm and unfalled testes, as well as a few innocuous anomalies such as cowlicks and kinked tails. Animals Texas Cats Give Florida Panthers Another 9 Lives Montana isn't alone. A number of Western states continually attempt to reduce their carnivore populations, typically out of nexus over the risks they pose to people, pets and livestock. It appeared to work. "Thanks to this healthy infusion of insolent genetic material, the next generation didn't suffer the same problems that their parents did," said Craig Packer of the University of Minnesota, who was not involved with the study but wrote an accompanying commentary on it for the journal Science. The last surviving panther subspecies in Eastern North America was caught in a downward spiral. All bets were on the cat to go extinct—and quickly. "This put us in a bit of a pickle," said Stephen O'Brien of the National Cancer Institute, in Maryearth, and senior researcher on the study. posted: 23 September 2010 02:04 pm ET "There's still not much of a way that a cougar from Montana or Texas is going to make it past Knoxville and Little Rock," Packer said. "So this may have to be repeated sometime in the future." "The population today, carry outd through genetic restoration, is healthier and larger as a result of mimicking a mode that historically occurred naturally between Florida panthers and Texas pumas," noted David Onorato of the Florida Fish and Wildlife Conservation Commission and one of the researchers on the study. (Panthers are also called pumas,File Pumas flag.jpg - Wikimedia Commons, cougars and mountain lions.) The study is detailed in the Sept.23 edition of the journal Science. The new study's landmark methods and findings offer encoufuryment for other endtempered animals that are claearng at survival. Representations are either underway or being considered for the restoration of lion and rhinoceros populations in Africa and a leopard species in Russia. "And as our housing advances and ranches spread more and more into wildlife areas, big cats are inevitably going to be restricted to small island populations just like the Florida panther," Packer said. "If there is going to be the continuation of healthy populations of tigers, leopards,cheap puma running shoes, lions and jaguars, it's going to require an terrible lot of management." 10 Species Success Stories 10 Species You Can Kiss Goodbye World's Cutest Baby Wild Animals Bring in the big cats By Lynne Peeples, LiveScience Contributor An estimated three times as many panthers are now slinking through the swamps and Everglades of southern Florida estimated withthe mid-1990s, when just 20 to 30 were view to remain. |
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