I'm not sure if I'm able to answer your question properly and gauge the relative contribution of those different factors. Certainly, habitat has been favourable for lobster. We happen to be in the sweet spot for lobster in Atlantic Canada, and that's why it does so well.
I would say that the changes in carapace size must contribute significantly to the overall abundance that we've seen. Just for a relative comparison, in 1987, the minimum carapace size was 63.5 millimetres. That produced about 5% of females of age and ability to reproduce. At 72 millimetres, that produced 50% mature females. At 76 millimetres, that produced 75% mature females. At 80 millimetres, we're looking at nearly 100% of mature females that are able to reach the fishery and contribute to the fishery and produce eggs.