A 19" WAE at 1.5lbs is 56.7%RW.
A 19" WAE should weigh 2.64lbs to be 100%RW.
Chances of reproduction are very, very low. WAE topping out at 14-16" in a pond is not uncommon because they don't do well on sunfish generally. It would take a large abundance of golden shiner to keep them happy in a shad-free pond.
Lot's of rock/sand/gravel substrate in 1-4' of water with current is needed for higher chances of reproduction.