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

Performance of Different Feeding Frequency on Growth Indices and Survival of Monosex Tilapia, Oreochromis Niloticus (teleostei: Cichlidae) Fry

Zannatul Ferdous
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202

Md. Mohsin Ali
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202

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

Md. Shafaet Hossen
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh-2202

Nazmun Nahar
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

An experiment was conducted for twenty eight days to evaluate the efficacy of feeding frequency on growth performance and survival of monosex tilapia (Oreochromis niloticus) fry. A total of 13,500 fry of three days- old (weight 0.018±0.04 g) were stocked in nine hapa (1×1×1 m³) at the rate of 1500 fry/hapa. The hapas were divided into three treatments on the basis of feeding frequency viz. 3 (T₁), 4 (T₂) and 5 (T₃) times per day respectively, having three replications. Fry were fed with 17α-methyltestosterone (MT) hormone mixed feed initially at the rate of 25% of their body weight and the rate was gradually reduced by 10% up to the final week. The water quality parameters were monitored found to be within suitable range for proper growth of O. niloticus. After ending the trial period, significant variations (P<0.01) were observed in three treatments and T₃ showed the best performance in case of all parameters studied such as weight gain (WG), feed conversion ratio (FCR) and specific growth rate (SGR). The survival rates were estimated highest (95.66%) in T₃ compared to the rest two treatments (T₁ and T₂). The results revealed that feeding frequency had a positive effect on growth indices and the survival rate of O. niloticus fry.

Keywords: Feeding frequency, Monosex tilapia, Growth, Survival

Location: Mymensingh district, Bangladesh.

Start Date: 22-07-2013

End Date: 18-08-2013

Program Area: Animal Health and Management

Commodity: Tilapia

Objectives:

To find a suitable feeding frequency for optimal growth and survival during rearing of O. niloticus fry.

Methodology:

Experimental design and rearing of O. niloticus Fry: This study was carried out in a private hatchery called “Reliance Aqua Farms”, Trishal, Mymensingh from 22 July to 18 August, 2013. A total of 13,500 hatchery produced fry having initial size (0.018±0.04 g) were distributed in nine experimental hapas (1×1×1 m³) at a density of 1500 fry/hapa. All hapas were newly constructed before the start of the experiment and setup in a pond. Hapas were rectangular of synthetic netting of mesh size 1.5 mm closed from all sides except the top. The synthetic net was fitted with a bamboo pole by using rope and metallic wire. After that, hapas were divided into three treatments on the basis of feeding frequency, such as 3 (T₁), 4 (T₂) and 5 (T₃) times per day having three replications. Fry were provided hormone (17α-methyltestosterone) mixed formulated feed following the method of for a period of 28 days. Then prepared diets were air dried at room temperature and stored for further application in a plastic container after sealing polythene bag. During the rearing period, in case of T₁ (8:00, 12:00 and 16:00 hours) feed was provided three times per day, T₂ Four times per day (8:00, 11:00, 14:00 and 17:00 hours) and T₃ Five times per day (8:00, 10:00, 12:00, 14:00 and 16:00 hours) initially 25% of their body weight and reduced gradually at the rate of 10% of their body weight up to the final week. Proximate composition of fry diet was determined following the standard methods as given by the Association of Official Analytical Chemists. During the experimental period, water temperature by using a Celsius thermometer, pH with a portable digital pH meter (MICRO-TEMP, pH 500) and dissolved oxygen (DO) by a digital DO meter (multi 340 i/set, DO-5509; Germany) were recorded as 26.5±1 ^oC, 7.5±0.2 and 6.8±0.4 ppm, respectively. Performance evaluation of O. niloticus fry: Periodic sampling of fry was done to assess the growth and health status of fry every after seven days. Fry were caught by using a scoop net with proper care and kept in a bowl with water. Weight was taken by digital electric balance (AND GULF, Dubai, U.A.E., model: GL-300). Then, fry were released in the respective hapas. Sampling was done early in the morning when the fish’s stomach was about to empty, to avoid the biasness of weight due to the presence of excessive feed. Additionally, the mean weight gain (g), specific growth rate (SGR), feed conversion ratio (FCR) and survival of fry were recorded at the time of final harvesting and growth parameters were calculated.

Source of Information: International Journal of Fisheries and Aquatic Studies 2014; 1(5): 80-83

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

As we know, food availability and size variation are considered the primary causes of fish mortality. In this work, poor survival of O. niloticus fry was observed in T₁ and the highest was found in T₃. The water quality parameters determined during the study period was within the acceptable range for tilapia culture. In fine, increased the no. of feeding frequency resulted in a better food accessibility, reduced feed competition to avoid stress of fry (that is the main factor for growth stunted) and leading to a better growth performance. A feeding frequency of 5 times a day compared to other treatments in this study is suggested to be optimum for achieving utmost growth, feed conversion efficiency and higher survival rates among O. niloticus fry.

Knowledge Management: Journal