"Gest," looked around; it is only(?) on your very useful website. Here is your index page, for those interested in Newfoundland (and quite a bit of transplanted British Isles material) songs: Gest Newfoundland

I would guess that the song is not very old, at least from some lines (you can't jig a fish no more). Cod-jigging forbidden since 1992. It is not in Peacock, "Songs of the Newfoundland Outports."

Cod jiggers are collectable now!