sentences:  An important fishery for the Portuguese dogfish exists in Suruga Bay for liver oil; catches peaked during World War II, but declined soon after from over-exploitation.In the past few years, catches by the South East Trawl Fishery off Australia have been increasing, as fishers have been seeking out species not covered by commercial quotas following the relaxation of seafood mercury regulations.Shark landings in this fishery are affected by a prohibition on landing livers without the rest of the carcass.