Back in the day when I occasionally helped an offshore lobster fisherman tend his trawls we would sometimes find all his traps in a big tangled mess after the draggers went through and dragged all his traps.I learned everything from nature. My life in the forest rooted me. The supposed 'control' of predator populations is akin to pesticides on mites - population explosion.
Unfortunately the 'regulated' hunting of ungulates does not work that way, except for unhunted species taking over. In my area, I watched as the mule deer population was decimated as every fukin city hunter went forth with his buck ticket to be able to show off the biggest rack; all the best breeding stock; plain stupid. Now the mulies are almost zero and white tails abound. We always filled our freezer with white tails.
I witnessed the effects of those bottom drag nets when the Canadian and US fishermen were having their dispute and one or t'other decided to ruin fishing by scooping every fish. I went to one of my favorite rock cod fishing spots in the inside passage and it was a graveyard, where normally you haul up one after the other. We are a fucked up species (or race) The westcoast indigenous people never caused such destruction over thousands of years.
Even though the draggers were not allowed to target lobsters which were only allowed to be caught as by-catch they would indeed go through lobster rich areas in order to intentionally catch them.
He started taking used washing machines and refrigerators that he wrapped in barbed wire and would dump them over the side of the boat , leaving a nice surprise for the draggers nets.