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An Observation of Performances in Carp-prawn Polyculture in Respect of Fingerlings Size and Water Area

A.F.M. Shofiquzzoha
BFRI, Brackish water Station, Paikgacha, Khulna 9280, Bangladesh

M.S. Uddin
Bangladesh Fisheries Research Institute, Freshwater Station, Mymensingh 2201

M.G. Hussain
Bangladesh Fisheries Research Institute, Freshwater Station, Mymensingh 2201

M.V. Gupta
The WorldFish Center, Penang, Malaysia

M.A. Mazid
Bangladesh Fisheries Research Institute, Freshwater Station, Mymensingh 2201

Abstract/ Executive Summary:

Performances of fingerling size and water area was studied. Seven species of fish included 25% of Hypophthalmichthys molitrix, 15% of Catla catla, 20% of Labeo rohita, 10% of Cirrhinus mrigala, 10% of Ctenophyringodon idella and 20% of Macrobrachium rosenbergii were stocked at the rate of 8,000 individual/ha along Barbodes gonionotus at 6.0g weight size with a stocking density of 2,000 indl./ ha. Survival of all species was in the range of 39.9 to 96.3% except M. rosenbergii The highest survival was obtained from L. rohita (96.3%) followed by C. mrigala (96.0 %)., B. gonionotus (92.3%), C idella (90.6%), H. molitrix (84.0%), C. catla (81.7%) respectively. While the survival of M. rosenbergii was 13.1%. The highest production of 4912 kg/ha/yr was obtained from the bigger ponds (0.4 ha) stocked with 20-32g size of fingerlings, while lowest production (3123 kg/ha/yr) from small pond (0.1 ha) stocked with 3-10 g fingerlings. Economic analysis shows the highest net profit in bigger ponds stocked with bigger fish seed.

Keywords: Polyculture, Fingerling size, Water areas

Location: Bangladesh Fisheries Research Institute, Mymensingh

Start Date: 00-05-1993

End Date: 00-04-1994

Program Area: Animal Health and Management

Commodity: Carp fish

Objectives:

To study the size of fingerlings at stocking and pond size on fish production.

Methodology:

The study was undertaken in two size ponds of 0.1 and 0.4 ha each at the Bangladesh Fisheries Research Institute, Mymensingh during May'93-April'94. The ponds were prepared by drying and lime CaC0₃ was applied at the rate of 250 kg/ha, after three days, cattle manure was applied to the pond's bottom at the rate of 3,000 kg/ha. Subsequently the ponds were filled with deeper water and inorganic fertilizer urea and triple super phosphate (TSP) were applied at the rate of 50 kg/ha each. One week after fertilization, the ponds were stocked with fingerlings of selected species. The ponds were divided into three treatments, T₁; T₂ and T₃ with two replications each. Two ponds of 0.1 ha each were stocked with small size fingerlings (3.8-9.4g) as T₁, two ponds of 0.1 ha each and two ponds of 0.4 ha each were stocked with larger size fingerlings (20-32.5g) as T₂ and T₃,respectively. Six different species offish fingerlings in the proportion of 25% silver carp (Hypophthalmicthys molitrix), 15% catla (Catla catla), 20% rohu (Labeo rohita), 10% mrigal (Cirrhinus mrigala), 10% grass carp (Ctenopharyngodon idella) and 20% giant freshwater prawn Macrobrachium rosenbergii (each of l0g size) were stocked, maintained a density of 8,000 individuals/ha, in addition, fingerlings of Barbodes gonionotus each 6.8g were stocked in all the ponds at the rate of 2000 indl./ha. The ponds were fertilized at fortnightly intervals with alternate dose of cattle manure 1,000kg/ha, then urea and TSP (1:1 ratio) at the rate of l00kg/ha. The fish were fed daily with supplementary feed consisting rich bran (75%) and mustard oil cake (25%) at the rate of 2-3% of standing biomass, species C. idella were supplied green grass throughout the experimental period. Physico-chemical characteristics of pond waters viz., temperature and transparency were measured by thermometer and secchidisk, respectively dissolved oxygen, free carbon-dioxide and pH were measured by titration methods however, depth of water were recorded at monthly intervals. Plankton samples were collected at fortnightly intervals using 55 micro meter plankton net and quantitative estimates of phyto and zooplankton were made. Growth of fishes in length and weight was monitored at monthly intervals. The fish were harvested after 11 month of rearing, initially by seine netting and finally by draining out of ponds. Species wise number and weight of fish harvested were recorded and survival, growth and yield in different treatments were estimated.

Source of Information: Bangladesh J. Fish. Res., 6(2), 2002: 187-190

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

A comparatively bigger fingerlings (20-32g size) polyculture in comparatively bigger ponds (around 0.4ha) ) may increased the gross production and the net profit.

Knowledge Management: Journal