18 Jan 2013:
In Kenya Reserves, Poaching
Is Leading Cause of Death for Elephants
A 14-year study of elephants in northern Kenya has found that the animals are now more likely to die at the hands of human poachers
than of natural causes. When researchers began tracking 934 individual elephants at two adjacent reserves, Samburu and Buffalo Springs, in 1997, elephant populations were growing and illegal killing was rare, with perhaps one animal killed per year, according to George Wittemyer, a Colorado State University wildlife biologist and lead author of the study published in PLoS ONE
. But that started to change over the last decade, particularly for older elephants, which have larger tusks. In 2000, there were 38 male elephants over the age of 30 in their study population; by 2011, the number had dropped to 12. By that time, 56 percent of all elephants found dead had been poached. The long-term slaughter
also altered the demographics of the population. While males accounted for 42 percent of the population in 1997, their numbers dropped to 32 percent by 2011. In addition, 10 of the family groups they were tracking effectively “disappeared.”
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
e360 on Facebook
Donate to e360
View mobile site
Subscribe to our newsletter
Subscribe to our feed:
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
Photographer Peter Essick documents the swift changes wrought by global warming in Antarctica, Greenland, and other far-flung places. View the gallery.
is now available for mobile devices at e360.yale.edu/mobile
The Warriors of Qiugang
, a Yale Environment 360
video that chronicles the story of a Chinese village’s fight against a polluting chemical plant, was nominated for a 2011 Academy Award for Best Documentary (Short Subject).
Watch the video.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.
In a Yale Environment 360
video, photographer Pete McBride documents how increasing water demands have transformed the Colorado River, the lifeblood of the arid Southwest. Watch the video.