Polyculture of freshwater prawn, Macrobrachium rosenbergii, de Man with carps: effects of prawn stocking density
Effects of three stocking densities, viz., 35, 50 and 65/decimal (1 decimal = 40.48 m2) ofjuvenile freshwater prawn (Macrobrachium rosenbergii) on prawn and fish production weretested in a polycuture system with silver carp (Hypophthalmichthys molitrix), catla (Catla catla), Grass carp (Ctenophmyngodon idella) and silver barb (Barbodes gonionotus). The fishstocking density was 19/decimal with the species combination of silver carp-10, catlac-6,grass carp-1 and silver barb-2. In a 8-month culture period, the prawn yield 423 ± 144kg/ha was significantly lower (P< 0.5) with the prawn stocking density of 35/decimalthan that of 548 ± 178 kg/ha and 662 ± 243 kg/ha with 50 and 65/decimal respectively. Thefish production (1844-1891 kg/ha) did not differ significantly (p <0.05) among the threetreatments indicating that prawn stocking densities had no influence on fish yield. Thelower mean harvest weight (62 g) and survival rate (67 g) and higher yield (2.67kg/decimal) with the highest stocking rate of prawn reveals that as density was increased,prawn survival and individual weight at harvest decreased but total yield increased.
| Main Authors: | , , , |
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| Format: | article biblioteca |
| Language: | English |
| Published: |
2001
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| Subjects: | Aquaculture, Fisheries, M. rosenbergii, Polyculture, Stocking density, |
| Online Access: | http://hdl.handle.net/1834/33238 |
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