triploid trout

"peakstroller" wrote in message
oups.com...
I have just been reading an interesting article on how Triploid trout
are reared. My question is why are they reared? Surely it would be
more productive to rear Trout that can reproduce ?


Rainbow Trout do not normally reproduce successfully in UK waters, and
especially not in stillwater 'put and take' fisheries. Hence there is no
advantage to fishery managers in stocking with reproductively 'viable'
rainbow trout.

Although they can seldom breed successfully, the bodies of 'normal' cock
rainbows still go through seasonal changes to prepare them for spawning,
which leads them to becoming what anglers describe as 'dark' fish which have
lost condition. Hence there is a disadvantage, from the viewpoint of fishery
managers and anglers, to stocking with 'normal' fish.

Stocking with triploids, which do not lose condition in the same way as
viable males, is therefore preferable and more cost effective.