Time, money and space. Ah. The holy trinity of breeding. heh You'll actually hear me say the breeding trinity time and time again.
Wicca mentioned one way of selective breeding- and it is very effective. However there are lots and lots of different ways of breeding and theories behind breeding.
Honestly, one of the best articles I have ever read on selective breeding is in the B&K #2, and talks about the bell curve and why it is so important.
Trying to selective breed is easy. Place shrimp together and pray they breed. The theories about what shrimp, why, and how are the things that can make your head spin while trying to get a handle on it.
I'm always learning and adding to my knowledge. Secrets will kill shrimping in this country. To add interest to shrimping, people have to be open to giving information.
I am NO expert on selective breeding by any stretch of the imagination. However whatever I know- or think I know- I will share freely with anyone who asks.