Reversing a legacy of trapping, hunting and poisoning that eradicated from the wild the gray wolf, Federal biologists announced that they had released nearly a dozen wolves from chain-link pens into the remote ponderosa forests and meadows in the White Mountains of eastern Arizona. The return of the Mexican gray wolf is the first step in an effort by the United States Fish and Wildlife Service and state officials to return 100 of the animals to the range after an absence of almost 30 years.