Quote:
Originally Posted by steveparton
In it's native state - ie the USA - the Rainbow is pretty much a February spawner - this is because they tend to do the business after Ice Out when flows aren't subject to further freezing.
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A rather simplistic view. There are spring and autumn spawning strains of native rainbow and steelhead trout.
Another simple link:
Rainbow Trout in the UK
"A firm favourite with the fishermen and because of the Rainbow trout’s faster growth rate it was a favourite with the fish farmer as well. The only fly in the ointment was that
two different strains of rainbow trout were used – the Kamloops and the Shasta strain.
Unfortunately
these strains became sexually mature at different times of the year. This resulted in fishermen catching ‘coloured’ fish in both late and early season.
The development of egg treatment solved this problem by producing rainbow trout which were all sterile females. This resulted in ‘clean’ fish all year round. As a bonus these trout also grew faster. The introduction of these ‘sexless’ rainbow trout had another benefit for the angler. It opened the door for the abolition of the closed season for rainbow trout. Pressure from both fishery owners and fishermen forced the abolition of the closed season."