Open AccessPOLYCULTURE OF FRESHWATER PRAWNS, TILAPIA, CHANNEL CATFISH AND CHINESE CARPS
Author(s) -
Behrends Leslie L.,
Kingsley John B.,
Price Albert H.
Publication year - 1985
Publication title -
journal of the world mariculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0735-0147
DOI - 10.1111/j.1749-7345.1985.tb00223.x
Subject(s) - catfish , ictalurus , polyculture , stocking , biology , grass carp , tilapia , fishery , zoology , silver carp , hypophthalmichthys , macrobrachium rosenbergii , carp , aquaculture , prawn , fish <actinopterygii>
Juvenile freshwater prawns ( Macrobrachium rosenbergii ), fingerling channel catfish ( Ictalurus punctatus ), young‐of‐the‐year tilapia ( Tilapia spp. ), F‐1 hybrid Chinese carp (female Aristichthys nobilis x male Hypopthalmichthys molitrix ), and grass carp ( Ctenopharynqodon idella ) were costocked into four replicate 0.05‐ha earthen ponds in 1983 and 1984 and cultured for 124–150 days, respectively. Stocking densities of prawns (20,000/ha), tilapia (2,500/ha), and grass carp (120/ha) were held constant during both years. However, in 1984 stocking densities of channel catfish and hybrid carp were reduced to 7,500/ha and 160/ha, respectively. Throughout each study, a commercial floating catfish feed containing 32% protein was broadcast into the ponds daily at 1600 hours. Feeding rates were adjusted daily to a maximum of 56 kg/ha/day in 1983 and 41 kg/ha/day in 1984. Average net production figures were strikingly similar during both years–3,180 kg/ha in 1983 and 3,150 kg/ha in 1984. Mean feed conversion values for all species combined were 1.4:1.0 and 1.0:1.0 in 1983 and 1984, respectively. Net production and mean individual weights of component species during 1983 were: prawns (445 kg/ha, x = 30 g), channel catfish (1,411 kg/ha, x = 180 g), tilapia (653 kg/ha, x = 284 g), hybrid carp (546 kg/ha, x = 1,186 g), and grass carp (127 kg/ha, x = 1,337 9). Net production and mean individual weights in 1984 were: prawns (287 kg/ha, x = 19 g), channel catfish (1,698 kg/ha, x = 263 g), tilapia (522 kg/ha, x = 291 g), hybrid carp (389 kg/ha, x = 4,430 g), and grass carp (253 kg/ha, x = 2,924 g). Mean survival of component species ranged from a low of 72.9% for tilapia in 1984 to 100% for grass carp in 1983 and 1984.