A male elephant calf born on Friday bolsters the population of African elephants at the San Diego Zoo’s Wild Animal Park to 12.    The unnamed calf was born at 3:16 a.m. to Umngani (oom-gah-knee), a name that means "friend" in the SiSwati language. The mother and calf will be slowly introduced to the rest of the herd over the next several days. Keepers and researchers are monitoring the pair to ensure Umngani properly cares for the newborn and to gather important information about calf development.     "The San Diego Zoo and Wild Animal Park have an unwavering commitment to the conservation of African and Asian elephants," said Jeff Andrews, animal care manager and elephant program manager. "The birth of this calf furthers our mission of education and conservation by helping us talk to our visitors about the problems these animals face in their native habitats and allows us to gather data that is applicable to our conservation efforts both in their homelands and in zoos."     At the Zoo and Wild Animal Park, elephant studies are underway on nutrition, daily walking distance, growth and development and bioacoustic communication. In Africa, the Zoo is involved in elephant reproduction management and in a study on human-elephant conflicts as well as habitat range and use. In addition, the San Diego Zoo supports other elephant conservation projects through donations to the International Elephant Foundation, an organization that funds elephant conservation projects around the world. In 2004, the Zoo began contributing $30,000 yearly to the Big Game Parks in the Kingdom of Swaziland and will continue to fund programs like anti-poaching patrols, additional acreage for the Big Game Parks as well as improved infrastructure through 2014.     Rescued by the Wild Animal Park in August 2003, Umngani and six other adult elephants were to be culled in Swaziland's Big Game Parks because of elephant overpopulation. A lack of space and long periods of drought create...