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

Development of the Giant Freshwater Prawn Macrobrachium Rosenbergii (de Man 1779) Broodstock in Culture Ponds of South-western Bangladesh: a Case Study

Md. Samsul Alam
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh 2202 Bangladesh.

Mohammad Nurul Alam
Department of Fisheries Biology and Genetics Bangladesh Agricultural University, Mymensingh 2202 Bangladesh.

Abstract/ Executive Summary:

A study was conducted on development of the giant freshwater prawn Macrobrachium rosenbergii broodstocks in farmed conditions in Bangladesh. The post larvae (PL) were stocked in nine farms at an average density of 13263 Post larvae/hectare and fed with commercial feed until maturity. For complete maturation and spawning, the male and female prawns were stocked at a ratio of 1 male: 3 females in the month of January and fed with the commercial feed supplemented with cod liver oil. Out of the nine farms, brood prawns were successfully developed in three farms with good fecundity. Overall, the fecundity ranged from 8223 to 56853 with a mean of 30201±3026 and showed strong correlation with the size of the prawn. This study concludes that good quality M. rosenbergii broods can be produced in culture ponds by proper stocking, feeding and water quality management.

Keywords: Macrobrachium rosenbergii, Broodstock, Nutrition, Stocking density, Fecundity

Location: Satkhira, Bagerhat, Khulna, Narail and Jessore districts.

Start Date: 00-08-2009

End Date: 00-02-2010

Program Area: Resource Development and Management

Commodity: Prawn

Objectives:

To study the development of the giant freshwater prawn Macrobrachium rosenbergii broodstocks in farmed conditions in Bangladesh

Methodology:

The study was conducted for a period of seven months from August 2009 to February 2010. Selection of farms: Nine private farms were selected from Satkhira, Bagerhat, Khulna, Narail and Jessore districts for the study. The names of the farms, location, size of the brood rearing bonds, source of post larvae, stocking density and feeding. PLs were collected from adjacent rivers and reared for a period of three months from August to November, 2009 in the maturing pond. Stocking of male and female brooders in brood maturation pond: For maturation, the male and female broods were stocked together in single pond in each farm at a sex ratio of 1 male: 3 females. Commercial feed of Mega with a trade name of “Prawn Finisher” (35% protein, 4% lipid, and 6% crude fibre) supplemented with 5 ml cod liver oil per kg feed was provided. Out of the nine farms, aeration/water undulation facilities with motorized blower/aerator were available only in Anamika farm, Kaligonj, Satkhira. Water quality parameters: Different physico-chemical parameters such as water temperatures, pH, dissolved oxygen (DO) and alkalinity were recorded fortnightly from October 2009 to February 2010. Temperature of the pond water was recorded with a Celsius thermometer and pH was determined by a direct reading digital pH meter (Jenway, model, 3020). The dissolved oxygen was measured by a portable digital DO meter (YSI, model 58) and the total alkalinity was estimated by using a HACH Kit (DR-2010) following manufacturer’s instructions. Estimation of fecundity and egg sizes of gravid prawn: For estimating fecundity, gravid prawns were randomly collected and taken to the laboratory of the Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh. The weight of the female and the weight of eggs were recorded during the time of collection. For counting the eggs by gravimetric methods, an aliquot of the eggs were weighed using a Metler electronic balance and counted. The total number of eggs per female was calculated by multiplying the total weight of the eggs. The sizes of the eggs were measured by using micrometer fitted in a binocular microscope. Statistical analysis: The data on weight of berried females, weight of eggs/female, number of eggs/female, no. number of eggs/g female and egg size were subjected to one way analysis of variance (ANOVA) implemented in Excel 2010 program followed by multiple comparison. The correlation between the size of females and the number of eggs/female was also estimated using the same program.

Source of Information: Journal of Entomology and Zoology Studies 2014; 2 (5): 108-113

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It was possible to produce good quality gravid females in ponds by maintaining proper stocking density, water quality and providing balanced feed supplemented with sufficient amount of unsaturated fatty acid containing oil. The study also confirmed that a sex ratio of 1 male: 3 females was sufficient for successful fertilization of eggs of the gravid females.

Knowledge Management: Journal