OK, so maybe I'm wrong & it appears that IDE are in fact a species in their own right. (In the wild state that is)
However, I was given to understand that the ones bred for commercials Are sterile, & therefore can't breed even with their own kind??
That would explain why many lakes which once contained a very good head of IDE 4 or 5 years ago, now contain very few.
They're clearly not breeding.
It's also held by most of our club members, that the ones bred for commercial fisheries only have a life cycle of around 4 years.
An argument which stands up as we used to fish venues which were solid with them - They're not now!!
Interesting stuff there Martin, I hope your right....time will tell I suppose.
A good friend of mine does the envio studies for the canals and rivers trust, i'll ask him if he knows anything about them since he has a lot to do with stocking waters.
Edited by Tigger, 24 August 2016 - 09:30 AM.