HBG have both positive and negative aspects. Initial growth is fast and they are aggressive but they are mostly male (65 to 99 %) and there offspring are fewer (1000 vs 50000 for BG)and tend to degrade (outbreeding depression). HBG's ability to cross with BG or GSF is uncertain (most think -yes but limited). I have seen nothing on HBG X RES. Here is some info.


See pg 9 hybrid bream
http://msucares.com/pubs/publications/p1428.pdf