See this � it may help with CP fecundity questions.

http://web1.cnre.vt.edu/efish/families/chainpick.html

Reproductive Habits:
Mature between the ages of 1 to 4

Spawning occurs in February and March at 2-22�C

Spawning occurs in lake and stream shallows in submerged vegetation

Fecundity is 342-8,140 eggs per female