Forage availability will dictate most of that growth, with length of growing season also a factor.
Forage in ample amounts at the right sizes means best growth will occur with less competition.
WR of fish caught is a snapshot in time, but if you do it throughout the season, you will see a pattern emerge.
Fast growing Sunfish are commonly 140%-up WR (weight ratio), others here refer to RW-Relative weight-same alpha and beta are used in the equations. If you are interested in this, I can look up the charts, They are in the archives here. I also have the values to plug in to spread sheet for grams and mm, which-to me-is more accurate than ounces and inches.
| 
