Seed production of giant freshwater prawn (Macrobrachium rosenbergii) in Mekong Delta, Vietnam.

Author(s):  
Thi Thanh Hien Tran

Abstract Artificial seed reproduction of giant river prawn (Macrobrachium rosenbergii) has been studied in Vietnam since the early 1980s, especially since 1998. Most of this work has been done to obtain suitable broodstock sources, water sources, stocking densities, feed types and rearing scales for different rearing systems. These studies have contributed significantly to the development of prawn seed production technology for commercial practice in Vietnam, especially the Mekong Delta region, which had 91 hatcheries in 2003 compared to only 1 hatchery in 1999. The most popular production system is the modified static green water system, which is used by 88% of the hatcheries in the region. The total production of prawn seed in 2003 was 77.7 million post-larvae (PLs).

2012 ◽  
Vol 10 (1) ◽  
pp. 163-167 ◽  
Author(s):  
R Pervin ◽  
M A Wahab ◽  
K Fatema ◽  
M S R Khan

The effects of mola (Amblypharyngodon mola) at different densities in polyculture with freshwater prawn (Macrobrachium rosenbergii) were investigated at the Fisheries Field Laboratory, Bangladesh Agricultural University,  Mymensingh. The experiment had three treatments, viz. prawn + 1 mola m-2, prawn + 1.5 mola m-2 and prawn + 2 mola m-2 and were treated as T1, T2, and T3, respectively with three replications in each. Prawn stocking density was  same (3 juvenile m-2) in all treatments. Feeds were applied twice daily for prawn. Assuming 80% survival, feeding  rates were gradually reduced to 10-5% of body weight from the beginning to the last month. Water quality parameters  (except transparency, chlorophyll-a) did not vary significantly (P>0.05). Weight gain, SGR (% body weight), gross and  net production of prawn were not significantly different (P>0.05). Higher total production was recorded in T3 (574.61  ±39.58 kg ha-1) followed by TI (531.65±42.40 kg ha-1) and T2 (514.75±77.91 kg ha-1). It was found that addition of  mola at different densities had no effects on survival and production performance of prawn. Therefore, nutrient-dense mola may be stocked as an additional species with freshwater prawn. It might be concluded that treatment T3 was better proposition for prawn-mola polyculture. DOI: http://dx.doi.org/10.3329/jbau.v10i1.12109 J. Bangladesh Agril. Univ. 10(1): 163–167, 2012    


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