Henry's Lake Fall brookie's?

[DeeCee]

I'm still stumped about this all female thing. It is the sperm that determines whether an egg of fish or humans is a male or female.Another wards each sperm is either a male or female sperm. Do they now have a method for killing all the male sperm in milt before fertilizing fish eggs? How do they get only female fish? I know it is possible to sex trout after they grow several inches long by the shape of their head. The males have a longer jaw line ending in a "kype" at the front of the mouth and the females a shorter jaw line, but, this method is not 100% effective. To sort for all females to plant would require sexing the fish and then probably discarding the males which is terribly wasteful and non productive.
The heat or pressure method that produces triploid fish does not produce all females and doesn't change the sex of the unhatched eggs, only changes the genetic configuration within each egg. Could you please find out from your fish culture friends how they get all females? Thanks, good hearing from you.

DeeCee
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