Winter was historically always regarded as the time to stock all fish species and it remains the time of year when most species are best moved - especially silver fish. The metabolism of the fish is at its slowest and dissolved oxygen levels in the waters are usually at their peaks during the colder months.
However, following the research into Spring Carp Mortality Syndrome conducted just last year it was concluded that carp were possibly better moved in warmer temperatures once their metabolism and immune systems were 'up and running'.
If a virus, or indeed any disease causing agent, is present in a water body far better the carp face it with an immune system working at peak efficiency than an immune system which is still supressed due to low water temperatures.
At present it is still being looked on as a trial but the science makes sense. I would rather introduce carp to a water in summer than in winter.
I sympathise with Gordon's posititon and, like me, he will doubtless have some upset carpers after him but young fish have to be introduced to waters to ensure that future generations have big, British carp to fish for. All responsible fishery managers can do is ensure they eliminate the risks by making sure they know where their stock fish are coming from. Or, like we at RMC are now doing, breed from their own stock.
If anyone wants reliable sources of quality, British carp with a track record of making 40lb. + mail me at ian@rmcangling.co.uk and I'll put you in touch with some marvellous breeders.