Sir: With regard to Kirk Sweetsir's letter (31 May) concerning wolves in the wild, Vic Van Ballenberghe, wildlife biologist with the US Forest Service, based in Alaska, has stated: ' . . . wolf populations will not increase without limit in the absence of exploitation. For example, after wolf control in Game Management Unit 20A stopped, moose numbers more than tripled, but wolves increased only to their pre-control numbers.'
Iberian Wolf Recovery Centre