The Biology and Culture of Tilapias

Table 2. Polyculture of tilapia (Sarotherodon aureus) with common, silver and grass carp in a 1.4-ha pond at Dor, Israel (after Halevy 1979).

Species

First culture period: February 6 to May 30

Stocked Harvested Gain C w

Average Average Average daily Average daily o

Density weight Density weight weight gainlfish yield Total yield

( fishlha) (g) (fishlha) (ti?) (€9 (kdha) (kg/ha)

Tilapia
(Sarotherodon aureus)

Common carp
(Cyprinus carpio)

Silver carp 930 378 890 2,000 11.3
(Hypophthalmichthys molitrix)

Second culture period: July 3 to November 22

Stocked Harvested Gain

Average Average Average daily Average daily Annual

Density weight Density weight weight gainlfish yield Total yield total yield

Species (fishha) (g) (fishlha) (g) (g) (g) (kg/ha) (kg/ha)

Tiapia 5,000 0.5 4,560 224 1.6 7.3 1,018 1,416
(Sarotherodon aureus)

Common carp
(Cyprinus carpio)

Silver carp 1,070 750 1,070 2,2B 10.3 11.0 1,572 3,000
(Hypophthalmichthys molitrix)

Grass carp 1,430 10 1,290 150 1.0 1.3 180 180
(Ctenophary ngodon idella)

Grand total annual yield 7,957