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| | Killer Whale (Orcinus orca) (Site not responding. Last check: 2007-11-07) |
 | | The orca population, known to scientists as the "AT1 group," ranges from Prince William Sound to Kenai Fjords, and has dwindled from at least 22 animals to just 9 over the past 13 years. |
 | | Exposure to crude oil is one likely cause, as some members of the group were observed swimming through oil during the 1989 Exxon Valdez oil spill, and were never seen again. |
 | | Underwater vessel noise, which continues to increase in Prince William Sound, is known to disrupt the whales' hunting patterns, and populations of their primary prey, harbor seals, have declined over 80 percent over the last 20 years. |
| www.biologicaldiversity.org /swcbd/species/orca/PWS.html (498 words) |
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