Pond Boss Forums MANAGING AN EXISTING POND Evaluating and adjusting fish populations Tilapia

I do not have daily weight measurements per day of BG for growth as outdoor growth for an entire year due to winter conditions in Ohio where my fish growing days are around 180 with water temperature 60F+. For indoor RAS growth of BG from 1" (abt 0.15g) to 6.75 " after 273days and weighing 110g is around 0.4 gram/day for the shooters / jumpers. Then continued growth was outdoors to 1 yr old as 365 days was to 9” and 290 grams for 0.79grams/day.

I find it very interesting that weight gain per day for tilapia (primarily blue TP genetics) dramatically increased and was a lot more gain / day after the fish reached 7" long. From TP fry and growing for 151 days indoor RAS (Jan-Jun01) they likely as the largest males weighed around 135 - 145 grams. That weight gain per day was 0.96grams/day or close to 1 gram per day. Important note is that the amount of food supplied was decreased about 20-30 days proir to Jun1 to intentially slow the growth rate to produce TP primarily in the 3 fish/lb range. Thereafter the 7" at 145 grams and then growing for the next 106 days water 70F to mostly 78F to 87F the average daily weight gain was a maximum of 9.3 grams per day to some TP being 13” long and some weighing 2.0 to 2.2lbs at nine months old. Average weight gain per day for 257 total days was 3.89grams / day.

Some of the 2.2 lb TP were from a pond that had no pellet feeding and Chara as a main food source. The 2 lb TP from my pond daily ate some pellets and primarily Chara.