In Australia the main species is Sepiotheuthis australis, otherwise known as the southern calamari. In Tasmaina, they put a moritorium on squid fishing in certain areas known to be breeding grounds. Dont remember how long for. Anyway, I know there are ongoing studies into the breeding and longevity of different potential commercial species. There is quite a bit of debate on the longevity of cephalopods, in particular squid. It is apparent they have linear growth, but some work in the US has suggested that there might be two phases to this. This could have implications for fisheries and management. Anyway, there is plenty of work to be done in this area.