Park rejects ‘biobullets’

(Reuters) — Managers at Yellowstone National Park in the U.S. have rejected a plan to use air rifles to shoot the country’s last herd of purebred bison with so-called biobullets containing a vaccine against brucellosis.


Roughly half of Yellowstone’s 4,600 bison are estimated to have been exposed to brucellosis, a bacterial infection that can sometimes cause cattle and bison to miscarry.


Worries that infected bison may endanger cattle in states such as Montana and Wyoming that border Yellowstone had prompted the powerful ranching lobby to endorse biobullets — absorbable projectiles packed with vaccine. They would cut disease rates among bison by as much as 35 percent over 30 years.