Hi Gents i am not a sea trout fisher but just wondering why the river Tweed and certain other rivers seem to get larger than normal ones caught almost every day. I thought that the size of the fish would be based on the rivers force it runs, and what is required for it to get to the spawning grounds ? You look at the Tay which is a big powerful river yet its sea trout are not that big on average. Compared to the Tweed where almost every day we notice big sea trout over the 10lb being caught. I also have read about other rivers in the UK where the size of the Sea trout are larger than normal and doubles are regular catches.. So my question would be what makes these rivers produce big sea trout ? Also are we to beleive that these sea trout smolts enter the estuary then hang around the coast where they bulk up , i would have thought if this was the case then the Sea anglers would be catching them more regularly ?