triploid trout

In article , Derek Moody
writes
In article .com,
peakstroller URL:mailto
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 ?

1. Commercial fish farms would rather the fish put all their food into
saleable flesh rather than waste energy on spawning.
2. Fisheries connected to running water don't want to risk introducing a
foreign -breeding- species that might skew the local ecology.

Cheerio,


........and chances are - Rainbows will not breed anyway, at least in our
waters.

Large double figure Rainbows are just want some anglers(fishmongers)
want - but they are not /real/anglers anyway.
--
Bill Grey