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Comparative study between mono and polyculture systems on the production of prawn and milkfish in brackishwater ponds

Establishment of a Network of Aquaculture Centres in Asia

Year of publication 1987

Pages p. 27

Author Kuntiyo, Dan Baliao;Fisheries and Aquaculture Management Division

Product type Project

Edition 1

Synopsis (short abstract) The growth, survival, production and economic feasibility of milkfish and prawn grown singly and in combination are described. Stocking density combination involved 20,000 prawn jv/ha with 2,000 milkfish fingerlings/ha for polyculture; 20,000 prawn juv/ha in monoculture; and 2,000 milkfish fingerlings/ha in monoculture. After 109 culture days, results showed no significant difference (p<0.05) on growth and survival rates of both commodities in two culture schemes. Mean weight gain was 30.88 g fo r prawn and 263.33 g for milkfish in monoculture and 31.85 g and 210.57 g for prawn and milkfish, respectively, in the polyculture system. Mean survival rates were 94.03 percent for prawn and 99.0 percent for milkfish in polyculture; and 82.13 percent for prawn and 92.33 percent for milk-fish for the polyculture system. Net aggregate production, however, was highly significant in polyculture, attaining 923.50 kg/ha/crop. Economic feasibility revealed encouraging results for polyculture over mono culture, with return on investment (ROI) valued at 45 percent for polyculture.

Language English

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    This is one of a series of field documents prepared during the course of the UNDP project identified on the title page. The conclusions and recommendations given in the report are those considered appropriate at the time of its preparation. They may be modified in the light of further knowledge gained at subsequent stages of the project. The designations employed and the presentation of the material in this document do not imply the expression of any opinion whatsoever on the part of the Unite d Nations or the Food and Agriculture Organization of the United Nations concerning the legal or constitutional status of any country, territory or sea area, or concerning the delimitation of frontiers.
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    Production of prawn (Penaeus monodon Fabricius) using the modular pond system
    Establishment of a Network of Aquaculture Centres in Asia
    1987
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    This study was conducted to evaluate survival, growth, production, food conversion and economic feasibility in the monoculture of prawn (Penaeus monodon) at two stocking densities (15,000 juv/ha and 20,000 juv/ha) following modular pond system. Four sets of existing modular ponds at SEAFDEC, Leganes Research Station were used for this study. Each set forms a three-stage link-up. The area of each set is increasing progressively in a ratio of 1:2:4 proportion or a corresponding ratio of 550, 1100 and 2,200 m2 respectively. Using this method, prawns were grown and were provided a better utilization of space and increased number of croppings (six crops a year) than previously realized in straight-run culture. On Treatment 1 and Treatment 2 growth, survival rate and final body weight of the prawn showed that there were no significant differences between the two treatments. Observed significant differences was on greater average production of the prawn achieved which was 533 kg/ha in Treatme nt 2 than 404 kg/ha production in Treatment 1. Economic analysis for Treatment 1 and Treatment 2 showed that returns on investment were 69.5 and 72.0%; the payback periods were 1.4 and 1.3 years, respectively.
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