Polyculture of Thai pangus (Pangasius hypophthalmus,Sauvage 1878) with carps and prawn: a new approach in polyculture technology regarding growth performance and economic return |
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Authors: | Md Sherazul Islam Khandaker Anisul Huq Md Anisur Rahman |
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Institution: | 1. Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna, Bangladesh;2. Gazi Fish Culture Limited, Batiaghata, Khulna, Bangladesh |
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Abstract: | An experiment was conducted during May to December 2002 to determine growth performance, the highest economic return and suitable species composition in the polyculture of Thai pangus (Pangasius hypophthalmus) with carps (catla, Catla catla and rohu, Labeo rohita) and freshwater giant prawn (Macrobrachium rosenbergii) using low‐cost formulated feed. Three treatments (T1, T2 and T3) were conducted with three replications. The treatment T1 was designed as a monoculture of pangus with a stocking density of 17 500 individual ha?1. The other two treatments (T2 and T3) were designed as polyculture and stocked with pangus, catla, rohu and prawn with densities of 10 000, 2500, 5000, 3750 ha?1; and 10 000, 5000, 2500, 3750 ha?1 in T2 and T3 respectively. The net weight gain and production of pangus were significantly different (P>0.05) between monoculture and polyculture but were not different within the two polyculture systems. The production of catla and rohu were significantly different (P>0.05) in both treatments where prawn was not. Though the gross production (8.53 ton ha?1) was significantly (P>0.05) higher in T1, the higher gross net profit (Tk 154 201 ha?1) was in T2. Thus, the polyculture of pangus is more profitable than its monoculture and the species composition in T2 is more suitable than other composition. |
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Keywords: | polyculture Thai pangus carps freshwater prawn growth performance economic return |
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