TY - JOUR
T1 - Effect of densities and culture systems on growth, survival, yield, and economic return of freshwater prawn, Macrobrachium rosenbergii, farming in the rice field in the Mekong Delta, Vietnam
AU - Lan, Lam My
AU - Micha, Jean Claude
AU - Long, Duong Nhut
AU - Yen, Pham Truong
PY - 2006
Y1 - 2006
N2 - Postlarvae of Macrobrachium rosenbergii (de Man 1879) were stocked at 2, 4, and 6 postlarvae (PL)/m2 into rice fields under two culture systems, the integrated and the rotational prawn-rice system. Prawn was fed pellet feed twice daily. The growth of Macrobrachium rosenbergii decreased at higher stocking densities. Prawns in the rotational system grew faster than those in the integrated system. The yields ranged from 286±32 to 516±51, 412±17, to 584±41 kg/ha in the integrated and the rotational prawn-rice system, respectively. The yield at density of 2 PL/m2 was significantly lowest (P <0.05) and was highest in the treatment. with 6 PL/m2. However, at higher density, the investment cost significantly increased (P <0.05), while profit significantly decreased (P <0.05). At a density of 2 PL/m2, cost benefit ratio and profit was the highest (P <0.05). The integrated rice-prawn system gives lower profits than the rotational system.
AB - Postlarvae of Macrobrachium rosenbergii (de Man 1879) were stocked at 2, 4, and 6 postlarvae (PL)/m2 into rice fields under two culture systems, the integrated and the rotational prawn-rice system. Prawn was fed pellet feed twice daily. The growth of Macrobrachium rosenbergii decreased at higher stocking densities. Prawns in the rotational system grew faster than those in the integrated system. The yields ranged from 286±32 to 516±51, 412±17, to 584±41 kg/ha in the integrated and the rotational prawn-rice system, respectively. The yield at density of 2 PL/m2 was significantly lowest (P <0.05) and was highest in the treatment. with 6 PL/m2. However, at higher density, the investment cost significantly increased (P <0.05), while profit significantly decreased (P <0.05). At a density of 2 PL/m2, cost benefit ratio and profit was the highest (P <0.05). The integrated rice-prawn system gives lower profits than the rotational system.
KW - Density
KW - Macrobrachium rosenbergii
KW - Mekong Delta
KW - Rice-freshwater prawn farming systems
UR - http://www.scopus.com/inward/record.url?scp=33646442033&partnerID=8YFLogxK
U2 - 10.1300/J028v18n01_03
DO - 10.1300/J028v18n01_03
M3 - Article
AN - SCOPUS:33646442033
SN - 1045-4438
VL - 18
SP - 43
EP - 62
JO - Journal of Applied Aquaculture
JF - Journal of Applied Aquaculture
IS - 1
ER -