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  3. Who Killed the Sea Lions? A)Sitting in the turbulent(汹涌的)waters below the Bonneville Dam on the Columbia River, east of Portland

Who Killed the Sea Lions? A)Sitting in the turbulent(汹涌的)waters below the Bonneville Dam on the Columbia River, east of Portland

admin2015-04-30  45
问题                         Who Killed the Sea Lions?
A)Sitting in the turbulent(汹涌的)waters below the Bonneville Dam on the Columbia River, east of Portland, Oregon, 15-foot-square floating platforms surrounded by 8-foot-high fencing lay in wait, designed to trap sea lions. Last Saturday night, as usual, the traps set off by hand were open; fish and game representatives had permission to capture 61 California sea lions and had to wait until one of them was inside the cages. When biologists next checked the traps, around 11:30 Sunday morning, two were closed, six sea lions were dead, and the authorities had a fantastic detective story on their hands.
B)Federal and state officials descended on Bonneville, initially operating under the assumption that someone had shot the marine mammals with a high-powered rifle at close range. But Wednesday the mystery deepened: investigators finally determined that the animals were not killed by gunfire. Only one sea lion had small new wounds, which were consistent with bite marks, and the metal fragments found in soft tissue near the neck of two of the other animals could have been from old wounds. Federal officials now say they’re not even sure there were humans involved in the deaths, or whether the traps might have sprung by accident. What happened at Bonneville last weekend seems less and less clear.
C)Fueling the mystery is the hatred toward sea lions that is obvious among salmon(鲑鱼)fishermen in the Pacific Northwest these days. The salmon migration decreased drastically this year, causing officials to cut short the fishing season. In that climate, fishermen are none too favorably disposed to the population of California sea lions that regularly pass through the waters downstream of Bonneville Dam in the hope of feasting on a tasty Chinook. Steps were taken to clear the troublesome sea lions out. After nonfatal measures to ward off the persistent marine mammals proved ineffective, the states of Washington, Oregon and Idaho requested and were granted authority to remove the 61 most troublesome California sea lions-fatally, if necessary. Though the Humane Society of the United States filed suit challenging the states’ move, and the Ninth Circuit Court of Appeals stayed any action to kill the creatures, the states began to trap some of the sea lions in preparation for a transplant to zoos and marine parks where they would be offered them a new home. Authorities put the trapping program on hold on Sunday.
D)On Tuesday the Humane Society announced that it had reached a compromise with the government: in exchange for dropping its appeal against part of the lawsuit, the feds and states would suspend all trapping until at least next February.
E)Investigators refuse to say anything about how they’re going about solving the puzzle. Army Corps of Engineers spokesman Matt Rabe said his agency had turned over documents and possibly videotapes from security cameras at the scene, but Brian Gorman, spokesman for the National Ocean and Atmospheric Administration, said Friday that no video cameras had been trained on the traps. Bonneville’s "critical features"—the spillway(泄洪道), powerhouses and fish ladders—hadn’t been compromised, Rabe said. But the government will be reviewing its security measures in the wake of the incident to see if improvements are needed.
F)Gorman said NOAA investigators will try to determine how the gates were opened and are now awaiting tissue samples from the dead animals, which will indicate whether they were somehow poisoned— though it’s not at all clear how that could have happened, he said.
G)If foul play was involved, the criminals figured out a way to slip past security at a federally controlled dam that has taken extra safety precautions(预防)as a result of 9/11. If they gained access to the traps by land, they would have had to sneak around a gate manned by a guard. If they came by boat, they’d have had to sail the turbulent waters coming off the dam itself, which would require skilled seamanship. "We have two mysteries," Gorman said. "How did the animals die, and how did the gates get closed?"
H)Investigators haven’t ruled out some natural event or accident. One theory is that a drop in water levels below the dam could have put enough tension on the ropes to get disturbed group of trapped sea lions on one platform would likely have caused those on the other to jump into the water. It’s possible that, once trapped, the sea lions could have overheated. But it wasn’t a particularly hot day, Gorman said, and sea lions are known to spend several hours in the hot sun without any problem. "We really haven’t ruled anything out but space aliens," he said.
I)What about motive? So far the most intense participants in the debate have been members of the fishing community and animal rights activists, said Charles Hudson, a spokesman for the Columbia River Inter-Tribal Fish Commission. "There’s some out-of-the-gate speculation(推测)that it could be from the fishing community, or the animal rights community, doing some sort of back-burn on the issue, blowing it up by sacrificing a few sea lions as a means to an end," Hudson said.
J)But he quickly added that he is doubtful about such speculation, noting that events have been moving in the fishermen’s favor lately. "It would be a reach to think a fisherman who understood the issue would do this, knowing it could all be undone with one stupid move. If it was a fisherman, it was one of the dumber of the fishermen out there," Hudson said.
K)Earlier this week Humane Society officials carefully considered the possible suspects. Sharon Young, marine issues field director for the group, said, "There’s a fairly narrow universe of people who could be responsible... I think there are a lot of fishermen who are very frustrated that they’re competing with sea lions for fish."
L)Dennis Richey, executive director of Oregon Anglers, a 3, 000-member group that represents fishermen along the coast, pointed out that there are plenty of places to kill sea lions on the Columbia—places that wouldn’t require violating federal security for access. "The average Joe out there fishing is annoyed at the sea lions, but they wouldn’t go up to the dam and shoot them in the trap," Richey said, before the news surfaced that investigators had ruled out gunshots. "I suspect this was done for effect...This was too organized to be some hot-tempered person."
M)Another puzzle: if the animals were already in the process of being trapped and removed, why go to the trouble of killing them? Who would risk a jail sentence of up to a year and a fine of $100,000 to do something that was already in the works? Whatever the answer, the mystery has confused administrators who are trying to figure out the best way to address the broader problems at hand. As Gorman put it Tuesday, "I don’t know what we’re going to do next year... given what’s happened in the last few days."
It hasn’t been excluded that the death of the sea lions may possibly result from some natural event.
选项
答案H
解析 细节题。由题干关键词excluded和some natural event定位到H)段第一句“Investigators haven’t ruled out some natural eventor accident”，调查人员没有排除自然事件或事故的可能性。句中的excluded(排除在外)和文中的ruled out同义。
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