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Effect of Different Protein Level on Fingerlings Production of Black Carp Mylopharyngodon Piceus (richardson, 1846) in Pond

M A Samad*
Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh

M I Hossain
Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh

M Lutfunnahar
Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh

A K Paul
Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh

H Ferdaushy
Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted to assess the effect of feed supplement on growth and production performance of fingerlings of black carp (Mylopharyngodon piceus) such as T1 (25% protein supplement), T2 (30% protein supplement) and T3 (35% protein supplement), and each having three replications for a period of 60 days from 17 July to 16September 2012 in Rajshahi University hatchery complex. In this experiment, same stocking density was maintained in the study with different protein level supplemented feed. The highest final weight gain (22.48?0.34 g), survival rate (93.33?0.83%) and cost benefit ratio (CBR) were found in T3 (1:1.13). The lowest feed conversion ratio (1.48?0.01) was observed in T3 and the highest FCR value (1.91?0.04) was recorded in T1. The net profit was the highest in T3 and lowest in T1, which was significantly (p<0.05) different among the treatments. Cost and benefit ratio were calculated among the treatments. CBR was also the highest in T3 (1:1.13) and lowest in T1 (1:0.40). Findings indicated that treatment T3 (35% protein containing feed) was found best in terms of production and economics of M. pecieus fingerlings cultured in ponds.

Keywords: Feed, Fingerlings, Production, Black carp.

Location: Rajshahi University Campus

Start Date: 17-07-2012

End Date: 16-09-2012

Program Area: Animal Health and Management

Commodity: Carp fish, Protein

Objectives:

The present experiment had been conducted to develop an optimum protein level of M. piceus fry in nursery pond management system.

Methodology:

Research period and location: The experiment was carried out for a period of 60 days from 17 July to 16 September 2012 in Rajshahi University Campus. Initial mean length, 3.0+/ - 0.02 cm and weight, 3.0+/ - 0.02 g of M. piceusfry were stocked in the experimental ponds. The experimental ponds were rectangular in shape with similar size, depth, basin configuration and bottom type including water supply facilities. The average area of the ponds was 0.60 decimal (0.0024 hector). The water depth was maintained around 1.0 - 1.25 m. To maintain the water level and to keep the good water quality, water was added to the ponds at regular intervals using pump machine. Experimental design: M. piceus was used as experimental species. The experiment was conducted under 3 different treatments of black carp fry namely T1, T2 and T3, each with three replications for feeding with 25, 30 and 35% protein supplement, respectively. The fry stocking density was 240 deci-1 (60,000 no. ha^-1 ) for each treatment. Pond preparation: At first the bottom and sides of the selected ponds were repaired and all the aquatic weeds were removed manually. Rotenone (19.76 kg ha^-1 ) was used for the removal of predator and unwanted fish. After 7 days, all ponds were treated with lime at the rate of 247 kg ha^-1 to disinfect the water. Ponds were fertilized by using urea (242.06 kg ha^-1 ) and TSP (192.66 kg ha^-1 ). The sources of water of experimental ponds were rainfall and deep tubewell. During the introduction of water in the experimental pond, fine meshed (2 mm) nylon net hapa was used in the mouth of the pumped water to prevent predatory fish egg, spawns, fry and adult or fry of aquatic harmful insects to inhabit their entrance. Then natural food production was tested by glass and secchi disc method and the water toxicity of the ponds was checked simple hapa method with releasing some fry. Netting was done to remove small frog and water bug from the pond before 3 days of fry stocking. Collection and stocking of fry: Black carp fries were collected from private hatchery in Jessore. Fries were kept inside the polythene bag with proper oxygen and the mouth of the polythene was bound tightly by rope. Then the fry were brought and were transferred to the experimental pond and were acclimatized for about half an hour before releasing the fry to the experimental pond. The initial length and weight of 10 fries were recorded with the help of 5 mm graph paper and a sensitive portable electric balance (KD300kc:0.01g-300g). Initial average length and weight M. piceus fry 3.0+/ - 0.02 cm in length and 1.5+/-0.01 g in weight were stocked in the experimental ponds. Preparation of feed and application: Seven ingredients which were fish meal, rice bran, mustard oil cake, sesame oil cake, wheat bran, binder (molasses) and vitamins used in prepared feed. Pearson squares method (New, 1987) was used to calculate different protein level for fry of M. piceus. The required quantities of all ingredients mixed with hand (prepared feed) and spread it to the experimental pond surface. The supplemental feed was given to fry at the rate of 10%, 8% in 1st and 2nd month, respectively. The quantities of feed were adjusted every 15 days interval on the basis of increase in the average body weight of the stocked biomass. Half of the ration was supplied at 9.00 am and remaining half was supplied at 4.00 pm. Growth sampling and harvesting of fish: Fishes were sampled fortnightly using seine net to assess their growth and health condition. At least 10% of fish from each pond was taken to make assessment of growth trends and to readjust feeding rate. Length and weight of sampled fish were measured using a measuring scale and digital electronic balance (OHAUS, MODEL no. CT-1200-S). Fishes were handled carefully to avoid stress during sampling. After 60 days of rearing, all the fishes were harvested by netting repeatedly with a seine net from each pond. Water quality parameters: Physico-chemical parameters like water temperature (°C), transparency (cm), dissolved oxygen (mg 1^-1 ), CO₂ (mg l^-1 ), NH₃-N (mg 1^-1 ), pH, alkalinity (mg 1^-1 ) of each experimental pond were measured at 15 days intervals and data were recorded on sampling dates. Temperature was recorded using a celsius thermometer, transparency by secchi disc and other chemical parameters were recorded using Hack kit box (FF2, USA). Recording of water quality data were taken between 09:00 am and 10:00 am. Growth parameters: The growth, length and weight were measured in every 15 days intervals. To evaluate the fish growth the following formula were used. Economics analysis: A simple economic analysis was done to estimate the economic return in each treatment for experiment. The total cost of inputs was calculated and the economic return was determined by the differences between the total return (from the current market prices) and the total input cost. The cost in taka per unit yield (CPY) was calculated and was expressed as the cost in Tk kg^-1 of fishes produced. Statistical analysis: For the statistical analysis of data collected, one-way analysis of variance (ANOVA) was performed using the SPSS (Statistical Package for Social Science, evaluation version-15.0). Significance was assigned at the 0.05% level. The mean values were also compared to see the significant difference through DMRT (Duncan Multiple Range Test) after Zar (1984).

Source of Information: J. Sylhet Agril. Univ. 2(2):221-227, 2015 ISSN: 2308-1597

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present study is based on the fingerling production technique of M. piceus with protein supplement and the main aim of the study is to find out real status of fingerling production of M. piceus in Bangladesh for rural and subsistence farmers. From the study, considering water quality, production and economics, it is clear that the higher growth and survival of M. piceus was found in 35% protein supplement in (T3).

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