Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Optimization of Stocking Density of Vietnamese Climbing Perch in Cage at Coastal Region

Md. Lokman Ali
Department of Aquaculture, Patuakhali Science and Technology University, Patuakhali-8602, Bangladesh

Zinat Fatima Mitul
Department of Aquaculture, Patuakhali Science and Technology University, Patuakhali-8602, Bangladesh

Md. Rushna Alam
Department of Aquaculture, Patuakhali Science and Technology University, Patuakhali-8602, Bangladesh

Kanij Rukshana Sumi
Department of Aquaculture, Patuakhali Science and Technology University, Patuakhali-8602, Bangladesh

Sultan Mahmud
Department of Aquaculture, Patuakhali Science and Technology University, Patuakhali-8602, Bangladesh

Abstract/ Executive Summary:

First growing strain of climbing perch Vietnamese koi (Anabas testudineus) seed was imported from Vietnam at 2012. Presently, this strain is getting more popularity than our native and Thai koi strain as the growth rate of Vietnamese koi is much higher. An experiment was conducted from 6 May to 6 September 2013 to optimize the stocking density of Vietnamese climbing perch in the cage at Patuakhali district. Nine cages were used for this experiment having size 2.5m × 1.8m ×1.3m. The experiment was designed into three treatments having three replications assigned into a completely randomized design with various stocking density. The stocking density of different treatments T₁, T₂ and T₃ were 50, 75 and 100 fry.m^-3, respectively. Mega floating koi feed was delivered at a rate of 3 to 10% body weight twice a day. There was no significance difference among treatments for different yield parameters of Vietnamese koi (p<0.05). Survival of fish was not significantly affected by the stocking density and ranged between 93.33 to 95.66%. The significantly (p<0.05) higher fish production (kg.m^-3) was found in T3 (13.32 kg) compared to other treatments. A simple economic analysis of the Vietnamese koi cage culture showed that T₃ generated the maximum net profit Tk. 1052.02 m^-3 in four month followed by T₂ (Tk. 793.96) and T₁ (Tk. 532.65). So the present study revealed that highest stocking density (100 m^-3) of Vietnamese koi is most suitable in terms of production and economics in cage culture.

Keywords: Stocking density, Vietnamese koi, Cage and Coastal region.

Location: Patuakhali Science and Technology University (PSTU) campus.

Start Date: 00-00-2012

End Date: 00-00-2012

Program Area: Animal Health and Management

Commodity: Koi/Climbing

Objectives:

To optimize stocking density of koi in cage culture to get more profit.

Methodology:

The experimental hapa were constructed before the start of the experiment. The hapa were rectangular in size and synthetic netting of mesh size 5.0 mm closed from all sides except the top. The synthetic net were fitted with bamboo by using rope and metallic wire. The trough shaped enclosures of synthetic netting materials were fixed on the inner side of the frame. The hapa were kept afloat in such a way that 0.61 m of structure remains below in water and the remaining 0.61 m were kept above water, so that fishes can get free access of sunlight and air. The sizes of cage were 2.5 m × 1.8 m ×1.3 m. All the prepared hapa were set into the Lalkamal pond at Patuakhali Science and Technology University (PSTU) campus. A top net was also used to minimize escapes because the cage is only a few centimeters above the water surface. A small opening was kept at the top part of the cage to allow feeding, sampling of fish, removal of waste and harvesting. The experiment was designed into three treatment groups (group T₁, T₂, T₃) each having three replications based on stocking density. Hapa were randomly selected for three sets of trials. For convenience, the hapas were arbitrarily numbered by 1 to 9. The stocking density for different treatments T₁, T₂ and T₃ were 50, 75 and 100 fry.m^-3, respectively. Fry of Vietnamese koi was collected from “Sornalata Agro Farm Limited”, Trisal, Mymensingh, Bangladesh. The size of the experimental fry was 1-2 cm. The fry was stocked in each nine cage as per experimental design after proper conditioning at morning. Mega floating koi feed was used in this experiment. The experimental fish were fed in two times a day at 09.00 am and 5.00 pm. The quantity of feed was adjusted every 15 days at the rate of 50%, 40%, 30%, 20%, 10% and 5% on the basis of increase in the average body weight of the stocked biomass. The culture potentiality on the growth under the different stocking density was assessed by recording the rate of growth in terms of gain in length (cm) and weight (g) of fish at fortnightly interval. The length and weight were recorded by randomly sampling of 10 fishes from each hapa by using a small seine net. Weight was taken with a digital top loading balance (TANITA-5 kg x 1 g) and length with a measuring scale. All the data were recorded in a note book and spread sheet and then finally calculated the average length and weight of fishes according to treatment in every sampling day. Physico-chemical parameters like temperature, pH, dissolved oxygen (DO), ammonia and alkalinity of the pond water were measured twice a day at fortnightly interval. Temperature was recorded by using a celsius thermometer. Dissolved oxygen and pH were measured by portable digital DO meter and digital pH meter, respectively. Ammonia and alkalinity were measured by the respective test kit. An economic analysis was performed to estimate the net profit from different treatments. The net return/profit was measured by deducting the gross income from the gross cost per hapa. The benefit cost ratio was also measured as a ratio of gross income to gross cost. A simple economic analysis performed to estimate the net profit. The cost of inputs was calculated on the basis of wholesale market price (2013). The cost of Mega floating koi feed was Tk. 50 kg^-1. The selling price for Vietnamese koi was estimated as Tk. 200 kg^-1. The experimental data were statistically analyzed by one way ANOVA (Analysis of Variance) to see whether there were differences in different treatments. The means of different parameters were compared by Duncan’s new multiple range test (DMRT) at 5% probability level.

Source of Information: International Journal of Fisheries and Aquatic Studies 2015; 3(1): 385-388

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It can be said that growth performance of Vietnamese koi was not affected by stocking density. But highest stocking density (100 m^-3) of Vietnamese koi is preferable in case of production and economics. So from the results of present study it may be a recommended species for culture because of higher production of Vietnamese koi than Thai koi. Though Vietnamese koi is new to Bangladeshi farmers, so if farmers culture Vietnamese koi in case then it will be more profitable. For better understanding more research is needed.

Knowledge Management: Journal