It looks like the climate changes going on are actually favouring some of the main prey of the seals and sea lions on our coast. They haul out on rocks, so ice isn't an issue for them. The hake population, which is one of their main foods, is doing very well. Part of the herring decline and certainly part of the salmon decline we've seen do appear to be related to climate change factors and particularly to extreme temperature conditions and things like that.
That's the kind of thing that management can deal with by monitoring population size, by monitoring productivity and by adjusting the harvest from year to year. This is standard practice in fisheries. It's called feedback control or harvest control. They're management procedures.