[ti:Alaska Officials Use DNA to Help Count City Moose] [by:www.51voa.com] [00:00.00]更多听力请访问51VOA.COM [00:00.04]Wildlife biologists in the U.S. state of Alaska [00:04.88]are collecting genetic material from moose [00:09.28]in an attempt to get a correct count of the big animals. [00:15.52]The counting is being done in Alaska's largest city, Anchorage. [00:21.99]Many moose are found within the limits of the city of 300,000 people. [00:30.08]But officials are not sure how many moose pass through the area. [00:36.20]The counting process is not easy. [00:40.72]The animals continually move and the city covers an area [00:46.08]of over 5,000 square kilometers. [00:50.88]In the past, officials used low-flying airplanes [00:55.29]to watch for moose on the ground to estimate numbers. [01:00.68]But rules from the city's airport now bar such flights. [01:06.84]So Alaska's Department of Fish and Game [01:10.12]is experimenting with a new method for counting the city's moose. [01:16.40]They are collecting genetic material called DNA from the animals. [01:23.40]They say this will permit them to get better estimates [01:27.64]and identify each individual moose without having to capture them. [01:34.60]Biologists sought help from the public during their three-day project last month. [01:41.49]They asked people to call or send text messages [01:46.84]to report when they saw a moose. [01:50.64]Teams of moose trackers then quickly drove to the areas. [01:57.28]The teams shot the moose with special darts [02:01.24]designed to capture small pieces of skin and hair. [02:06.13]The darts are weighted so they fall off the moose and can be collected. [02:12.88]Researchers say the darts do not hurt the animals. [02:17.68]The skin and fur are then taken to a laboratory to be studied. [02:23.06]Biologist Dave Battle helped lead the project. [02:28.76]He told the Associated Press that until now, [02:32.36]officials had to take an "educated guess" [02:35.96]about the number of moose in the city. " [02:39.20]There's really been no technique up until now. [02:44.00]And it's something we've been kind of beating our heads against the wall [02:48.40]for the last couple of years about," he said. [02:52.43]The project is paid for with taxes on firearms, ammunition, [02:59.24]and archery equipment, as well as state hunting licenses. [03:06.08]Battle says the technology is allowing officials to improve their knowledge [03:11.88]and management of the moose population in the Anchorage area. [03:17.76]But he added that it will take some time to study the DNA material [03:23.16]to come up with specific numbers. [03:27.04]Safety was a big concern during the project. [03:31.60]Moose, which weigh up to 700 kilograms, [03:35.68]can be aggressive and dangerous to people. [03:39.69]Moose can cause deadly traffic accidents [03:43.76]and also can harm people and other animals by stepping on them. [03:50.28]I'm Bryan Lynn. [03:52.08]更多听力请访问51VOA.COM