EDMONTON -- Alberta is considering fencing off large areas of northern woodlands to preserve threatened caribou herds on some of the most heavily impacted lands in the province.

The proposal to create large calving pens for caribou is contained in a series of documents released Wednesday.

They include recommendations for a $40-million program to replant seismic lines to restore some of Alberta's most heavily developed forests, to be paid by industry.

They also say the province should continue its program of shooting wolves to reduce predation on caribou.

Many of Alberta's herds are on the verge of disappearing and the province is required by federal law to come up with a recovery plan.