local domestic cattle. To date no credible instance of bison to cattle transmission has ever been established, recorded or proven although there is some evidence of transmission between wild caribou and bison. Utah The State of Utah maintains two bison herds. Bison hunting in Utah is permitted in both the Antelope Island bison herd and the Henry Mountains bison herd though the licenses are limited and tightly controlled. A Game Ranger is also generally sent out with any hunters to help them find and select the right bison to kill. In this way, the hunting is used as a part of the wildlife management strategy and to help cull less desirable individuals. Every year all the bison in the Antelope Island bison herd are rounded up to be examined and vaccinated. Then most of them are turned loose again, to wander Antelope Island but approximately 100 bison are sold at an auction, and hunters are allowed to kill a half dozen bison. This hunting takes place on Antelope Island in December each year. Fees from the hunters are used to improve Antelope Island State Park and to help maintain the bison herd. Hunting is also allowed every year in the Henry Mountains bison herd in Utah. The Henry Mountains herd has sometimes numbered up to 500 individuals but the Utah Division of Wildlife Resources has determined that the carrying capacity for the Henry Mountains bison herd is 325 individuals. Some of the extra individuals have been transplanted, but most of them are not transplanted or sold, so hunting is the major tool used to control their population. "In 2009, 146 public once-in-a-lifetime Henry Mountain bison hunting permits were issued." Most years, 50 to 100 licenses are issued to hunt bison in the Henry Mountains. Alaska Bison were also reintroduced to Alaska in 1928, and both domestic and wild herds subsist in a few parts of the state. The state grants limited permits to hunt wild bison each year. Mexico In 2001 the United States government donated some bison calves from South Dakota and Colorado to the Mexican government for the reintroduction of bison to Mexico's nature reserves. These reserves included El Uno Ranch at Janos and Santa Elena Canyon, Chihuahua, and Boquillas del Carmen, Coahuila, which are located on the southern shore of the Rio Grande and the grasslands bordering Texas and New Mexico. See also American Bison Society Bovid