Great pictures ewest. Thanks.
I would presume that if a person was aiming at getting some hybrids on purpose, introducing a single gender of the target species would help?
For example, introducing only female RES in a pond full of mixed BG might increase chances of a BG/RES hybrid compared to having both male and female RES? I would assume if the female RES had no choice in suitable males other than BG males she might select a male BG over letting her eggs go unfertilized. Does this sound like a reasonable assumption?
In some of the research articles you have previously posted, some crosses are very unlikely in nature (though can be cone in the lab) where others are more common. As an example a male GSF x female RES is very unlikely to happen in nature (but when done in the lab leads to mostly male offspring which is usually the desired outcome) but the male RES x female GSF is much more likely (but produces roughly 50-50 male/female offspring which can also reproduce).
At least that is what I gleaned from one of the very old research papers where they were stocking ponds with a few RES males and GSF females to populate the pond with RES/GSF hybrids. I think this was back in the day when stocking fish hybrids were not commercially available like they are today.
