Very little info on RES spawning wrt specifics. See this re BG and GSF which should be close.

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=7;t=000318;p=2#000024

I agree with Bill based on prior research. It should take about 21 days for the female BG to develop eggs to full ripeness from the time she is exposed to the required photoperiod ( 14 hrs of light in studies)and the right stabilized temps. ( 68 F and above as I recall). I would also guess that there could be some local adaptation to these within a minor range.

http://www.pondboss.com/cgi-bin/ubbcgi/ultimatebb.cgi?ubb=get_topic;f=20;t=002523

Based on this I would make a "wild guess" and say you should see ripe eggs by at least, around 21 days after the female fish are holding in water 60-68 degrees and with a photo period of 14 hrs.