Some scientists--not all--are saying that that is in fact the case, and it's a major component of natural mortality in the southern gulf. I think we also have to put it in a broader context. We had a population that was depleted by significant fishing. It was subject to low productivity while that fishing was going on, and we knocked the population down well below a reasonable limit. The limit in the southern gulf, as I recall, is 80,000 tonnes. That's thought to be a place you don't want to go below.
In addition, we have other environmental changes, such as lower oxygen and higher temperatures. Those are things that don't help cod either.