I am working on a selective breeding program crossing Rocky Mountain White (O.aureus X O.niloticus) with F1's O.mossombica. I'm consistently getting a 50:50 male female fry ratio. Male fry can be seperated from females at 2 weeks, that's what makes this hybrid nice. At first it was a haunch...I noticed significant difference in phenotype and began seprating the orange fry from the dark/grey phenotype. 3 months later my initial observations were validated by visual inspection of sex organs. Females were predominately orange with some black pigmentation. Where as the male population exhibited two different phenotypes. They are either dark grey with verticle stripes, or a very light shade of grey (almost white) with less predominant stripes. I must say it was a surprise to observe such an array of pigmentation, and this makes selective breeding all the more fun.
Don
Don
