alot of this is possibly down to global warming and the food chain in general (also maybe made worse this year by the winter storms as per the many reports of large numbers of dead auks washed up around our coasts having died of starvation)............if you start at the bottom, the smaller organisms that thrive at a certain lower sea temperature have been moving north as the water warms,all be it at a rate that we humans barely detect....so in turn the small baitfish (sandeels) also move north to follow their food supply.........this was noticed a couple of years ago when uk puffin colonies were really suffering and their young were dying of starvation.............
so the sandeels move north.......and are followed by the mackerel as we are told that the huge shoals of macks are now being caught well north of scotland and nearer to iceland.........
i spent a couple of hrs yesterday reading a scientific report on the impact that the ever increasing numbers of bass making Norway their home might have on their local cod population..........turns out that they live and feed at different depths and arent in direct competition for food, but with each year that passes more and more bass are becoming resident rather than completely leaving there during the winter...........they have been electronically tagging bass and recording their movements ..........shame we cant be arsed to do the same.........
some of the data they reveal is very interesting...........
like ,bass feed mostly at night in the winter and spring.........then switch to daylight in summer and autumn.....but always peak at first and last light, also they confirm that bass become much less active at sea temps of 10c or below,and probably stop feeding completely at 7c or below...................shame the uk cant spend any money on similar studies of our own bass stocks.........
at the end of the day us pluggers cant really change anything so have to take our bassing as it comes i guess.....
ps........i'm no scientist so all the above is probably a load of cobblers, but is how i see it...lol