A study led by Thure Cerling, a professor at the University of Utah, and co-authored by Sam Wasser, a University of Washington professor of biology, used carbon isotope science to show that tusks from a guarded government stockpile in Burundi have somehow made their way into the hands of illegal ivory traders.
A team led by scientists at the University of Washington and special agents with the U.S. Department of Homeland Security has used genetic testing of ivory shipments seized by law enforcement to uncover the international criminal networks behind ivory trafficking out of Africa. The genetic connections across shipments that they’ve uncovered exposes an even higher degree of organization among ivory smuggling networks than previously known. The paper, published Feb. 14 in the journal Nature Human Behaviour, incorporates results from DNA testing of more than 4,000 African elephant tusks from 49 different ivory seizures made in 12 African nations over a 17-year period.
Across the globe, endangered species are at risk for illegal poaching. African elephants are sought out for their ivory, rhinoceros for their singular horns, and armadillo-like pangolins for their protective, brittle scales. Add to that list valuable and environmentally sensitive trees illegally harvested throughout the world where entire ecosystems are being deforested and illegal, unreported and unregulated fishing that is devastating oceans. These illicit markets, estimated at $1 trillion annually, cause enormous environmental impacts and have the potential to unleash new, deadly pathogens.
The international trade in elephant ivory has been illegal since 1989, yet African elephant numbers continue to decline. In 2016, the International Union for Conservation of Nature cited ivory poaching as a primary reason for a staggering loss of about 111,000 elephants between 2005 and 2015 — leaving their total numbers at an estimated 415,000. For media Download soundbites, b-roll and images In a paper published Sept. 19 in the journal Science Advances, an international team led by scientists at…
A University of Washington professor has been awarded the prestigious Albert Schweitzer Medal for his work for developing noninvasive tools for monitoring human impacts on wildlife. Samuel K. Wasser was honored in a ceremony in Washington, D.C., Tuesday evening. The award was presented by Washington Sen. Maria Cantwell.
A multi-year survey of the nutritional, physiological and reproductive health of endangered southern resident killer whales suggests that up to two-thirds of pregnancies failed in this population from 2007 to 2014. The study links this orca population’s low reproductive success to stress brought on by low or variable abundance of their most nutrient-rich prey, Chinook salmon.
More than 90 percent of ivory in large, seized shipments came from elephants that died less than three years before, according to a new study from a team of scientists at the University of Utah, the University of Washington and partner institutions. They combined a new approach to radiocarbon dating of ivory samples with genetic analysis tools developed by UW biology professor Sam Wasser.
A team of conservationists at the University of Washington is among the Grand Prize Winners of the Wildlife Crime Tech Challenge for a proposal to identify poaching hotspots for pangolins, one of the most trafficked group of mammals in the world.
University of Washington biologist Samuel Wasser uses DNA evidence to trace the origin of illegal ivory and help police an international trade that is decimating African elephant populations. New results show that over the past decade, ivory has largely come from just two areas in Africa.