Density effects of silver carp Hypophthalmichthys molitrix and catla Catla catla on the production system in all-male freshwater prawn-finfish polyculture ponds

作者：Rahman Sheikh Md Shamsur^*; Wahab Md Abdul; Kunda Mrityunjoy; Islam Md Ashraful; Azim Md Ekram

来源：Aquaculture Research, 2010, 41(10): e456-e466.

DOI：10.1111/j.1365-2109.2010.02495.x

• all-male freshwater prawn
• silver carp
• catla
• mola
• polyculture
• stocking density

The effects of three different combinations of silver carp Hypophthalmichthys molitrix and catla Catla catla density on the production system in all-male freshwater prawn-finfish polyculture ponds were evaluated in triplicate. The stocking density of silver carp and catla, respectively, were maintained at 2000 and 500 ha-1 in treatment SC(2000)C(500), 1500 and 1000 ha-1 in treatment SC(1500)C(1000) and 1000 and 1500 ha-1 in treatment SC(1000)C(1500). Male freshwater prawn Macrobrachium rosenbergii and small fish mola Amblypharyngodon mola densities were fixed in all treatments at 12 000 and 20 000 ha-1 respectively. Management practices were same for all treatments. Blue-clawed male prawns were harvested twice during the 122-day culture at 15-day intervals before the final harvest. Plankton and macro-benthos abundance and water quality parameters (except transparency and chlorophyll a) did not vary significantly (P > 0.05) among treatments. Mean final weights of both silver carp and catla were decreased with the increasing of their own stocking density. The treatment SC(1500)C(1000) resulted in 25-32% increased net production of silver carp plus catla (461 kg ha-1) and 20-21% increased net production of all species combined (874 kg ha-1) as compared with the other treatments, although the differences in production of prawn and mola among treatments were not significant.

• 出版日期2010-9-16