長江女神 - 白鱀豚已經絕種, 人類又一惡孽

From the Toronto Star (English)

人類幾時才能對動物有一點點尊重﹖

有少數人類對動物是尊重的
但是有更多人類認為動物是不需尊重的
天生萬物以養人啊
話說回來，何謂尊重動物，大概也會吵很大吧

蛇的link死了。

問題的根源從來就不是道德，尊重也好不尊重也好，環境資源有限，而人類要耗用這些資源來供自身生存發展，現實就是這樣。保護珍稀動物是必要的，對於這點多數人還是尊重的，因此有各種法律、保育計畫等等，可再怎麼尊重，這也只能是人類發展過程之中的一種緩衝。

還有，從技術上來說，如今尚不能下「白鱀豚已經絕種」這種結論。這次主要是在一次科學考察沒有發現此物種的蹤跡，而這並非判定絕種的充分條件。當然了，就算今天沒絕種，不久以後絕種可能性依然很大，除非能找到其他有效的人工保護方式。

Science 22 Dec 2006 1860

WILDLIFE CONSERVATION:
River Dolphins Down for the Count, and Perhaps Out

Jerry Guo*

The world's rarest cetacean is nowhere to be found. Last week, a 3500-kilometer survey along China's Yangtze River failed to turn up a single river dolphin, or baiji (Lipotes vexillifer). "It's going to take a rescue effort of epic proportions to save this species," says Karen Baragona, director of the World Wildlife Fund's China programs. But it may already be too late for the nearly blind, pale creature. Expedition organizer August Pfluger, head of the Swiss-based baiji.org Foundation, says bluntly: "The baiji is functionally extinct."


Unhappy hunting. Expedition members search fruitlessly for signs of baiji on the hazy Yangtze River. The last baiji in captivity (inset) died in 2002.
CREDITS: BARBARA TAYLOR/NOAA/U.S. DEPARTMENT OF COMMERCE; (INSET) WANG XIAOQIANG

The gloomy appraisal has prompted researchers to redouble efforts to save another endangered Yangtze cetacean, the finless porpoise, known in China as the jiangzhu, or river pig. (Cetaceans include whales, dolphins, and porpoises.) The survey recorded fewer than 300 of the world's only freshwater porpoise (Neophocaena phocaenoides asiaorientalis). Experts now estimate a total population of at most 1400, a 50% decline from the last major survey in 1991. "Without further intervention, the finless porpoise will be the next baiji," says survey member Zhang Xianfeng of the Wuhan Institute of Hydrobiology.
Although biologists knew the baiji was scarce, coming home empty-handed after a 6-week survey up and down the Yangtze was unexpected. A team from China, the United Kingdom, and the United States had planned to follow the survey with a $400,000 "rescue mission" to transfer any captured baiji to Tian-e-Zhou Lake in Hubei Province, a sanctuary holding 30 f inless porpoises. That plan has been shelved, says Pfluger.

The baiji split from other dolphins 20 million years ago. Since then, the baiji's eyes have shrunk to pea size. It can discern only light and dark, so it relies on a finely tuned sonar to hunt prey in the silty Yangtze. The last comprehensive survey in 1997 found 13 baiji; from this figure, experts pegged the population at fewer than 100. "For us to see zero means there might be 10" left in the wild, says survey member Barbara Taylor, a marine biologist with the U.S. National Oceanic and Atmospheric Administration (NOAA). Or, as Pfluger notes, zero may mean zero. If so, the baiji would follow the Stellar's sea cow, Caribbean monk seal, and Japanese sea lion into oblivion as the fourth large marine mammal to go extinct in the last 3 centuries. It would be the first cetacean lost in modern times.

Although the baiji's fate is uncertain, the dangers it faces are all too apparent. The most immediate threat is the use of rolling hooks, says expedition co-director Robert Pitman, a NOAA marine biologist. These illegal fishing lines are stretched across a river and are known to snag and drown baiji. During the survey, says Pitman, "we saw hundreds of fishermen using rolling hooks."

Long-term hazards are pollution and choking boat traffic. Near Poyang Lake in Jiangxi Province, connected to the Yangtze by a narrow channel, Taylor counted some 1200 boats in a span of 2 hours. Between the heavy traffic and numerous factories hard up against the lakeshore, Taylor declares Poyang the "biggest environmental disaster" she's ever seen. That's bad news, as Poyang, China's largest lake, is one of the last redoubts of the finless porpoise: It has the biggest intact population, estimated at 400, with 80 spotted during the survey. Plucking the porpoise from peril won't be simple. Proposed megadams may fragment remaining populations, says Zhang. "There's no hope to change the environmental conditions on the Yangtze," he says. Pfluger says his organization will educate fishers about the impact of illegal fishing and finance a sustainable-fishing initiative at Tian-e-Zhou Lake. There, two or three porpoises are born each year, and captive breeding has resulted in a pregnancy last year, says expedition co-director Wang Ding of the Institute of Hydrobiology. "We have to set up more seminatural reserves like Tian-e-Zhou," Wang says.

Sadly, that approach may no longer be applicable to the baiji, an apparent victim of China's booming economy and the attendant environmental degradation of a mighty river. "It seems the baiji is the only thing that is not made in China anymore," says Pitman.


Jerry Guo is a writer in New Haven, Connecticut.

求存同異的思想從來都不陌生，和諧共融再擴大一點就是，尊重生命，尊重一切生命　！