ML :

Good point ! While there is much discussion and concern and question about the genetics of GG and for that matter HBG --about size ,growth, offspring, etc. -- that is not the main reason they are recommended . Studies clearly show that HBG (and I would guess GG) are easier to catch and more aggressive about feeding (even to the point of warning about them being fished out)-- that and not size -- is the main reason they are recommended by many managers and biologists in the right circumstances.