Okay, got it.

So if a selective fishery is designed to use an amount of "impacts" in the form of released fish, does that mean more released fish will survive the fishery (to spawn), or do the same amount of non-target (wild) fish die a in a non-selective fishery? If the same, then how is one technique better than the other, for the fish?

Also, how does the expanded catch, from the selective fishery, affect the total catch for the 50:50 split? In other words, how is it possible to split the harvestable fish and impacts, equally, when the parties fish differently, selective vs non-selective?

Thanks for entertaining my questions.