30 Mar 2011:
Dolphin Death Toll in Gulf
‘Gravely’ Underestimated, Study Says
The number of dolphins and whales killed in the aftermath of the Deepwater Horizon spill has likely been significantly underestimated
, according to a new analysis. While a reported 101 whale and dolphin
carcasses have washed ashore in the Gulf of Mexico since last April’s spill, the actual death toll could be as much as 50 times higher, since most of the animals likely died far from shore and were never recovered, according to a report published in the journal Conservation Letters
. Using recent species abundance estimates, mortality rates, and historical data on observed strandings for 14 species of cetaceans — an order of mammals that includes dolphins and whales — the researchers calculated that only 2 percent of carcasses are ever recovered in the Gulf region. The difficulty of obtaining a more accurate estimate of cetacean deaths has been compounded by the fact that the spill occurred 40 miles offshore and oil drifted hundreds of miles from coastlines, said Rob Williams, a researcher at the University of British Columbia’s Marine Mammal Research Unit and lead author of the study.
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A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
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An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
Watch the video.
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.