Check out the following link to the Alaska Fish and Game website on Lings.

http://www.adfg.state.ak.us/pubs/notebook/fish/lingcod.php

Some interesting info here, does state that that lings mature at a 2-5 years (realtively fast compared to some rockfish and especially dogfish), and that fecundity does increase with size and age.

Also under management, it says "Management: Lingcod are highly susceptible to overfishing. In some areas along the Pacific Northwest coast (including Puget Sound, the Strait of Georgia, and near Resurrection Bay) lingcod have been overharvested. Once overharvested, lingcod require long periods to recover."

I haven't been in Seward in a couple years, but it use to be a pretty good haul to get out of Resurrection Bay to the decent ling grounds.