The Biology and Culture of Tilapias

Table 12. Summary of stocking, growth and harvesting data for the intensive cage culture of Sarotherodon aureus: uuiug floating pellets unless otherwise stated.

Stocking data Growth data Harvesting data Culture

Feeding Bi G MSG DRIB Pmf Bf MP period

Location details 2 Nlm3 (kglm3) (gld) (%I (5%) (10 (hg/m3) (kg/m3) FCR (mo) References and remarks

A. Alabama, U.S.A. 40% protein

DFR 3% B

As above

B. Alabama. U.S.A. 40% protein

DFR 3% B

40% protein

DFR 3% B

C. Alabama. U.S.A. 40% protein

DFR 3% B

D. Puerto Rico 36% protein

DFR 5% B

Armbrester 1972: 0.25 m3 cages (23 mm

mesh) in fertilized ponds; mean values

Suwauasart 1972: 0.31 m3 cages in fertile

ponds: mean values: fed for 70 d only

Suwauasart 1972: 0.12 m3 cages in fertile

ponds; mean values; fed for 70 d only:

sinking pellets

~ag6n 1973: 1 m3 cages in fish ponds: an

FCR of 1.2 was obtained for N286 m/m3

Jordan and P& 1973: 1 m3 cages (mesh

8 mm) in a rock quarry pond

a. bm the presence of moderate plankton blooms
in the presence of dense plankton blooms
'net values

Pmi :
N:
Bi :
G:
MSG:

mean weight at stocking

number of fish

mean biomass at stocking

average growth rate of individual fish dm the culture period

average monthly specific growth rate

DRIB : daily rate of increase of the biomass calculated from Bf = Bi (1 + i)" where n is the culture

period in days and i is EB

Pmt : mean weight at harvest loo

Bf : mean biomass at harvest

MP : average monthly production (Bf - Bi) observed and recalculated on a 30-day basis

FCR : feed conversion ratio, on a net weight basis unless otherwise indicated