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Livelihood Improvement of Prawn Farmers, Nurserers and Hatchery Operators of Noakhali Region Under Danida Project Ensuring Seed Quality

Dr. Md. Rafiqul Islam Sader
Professor
Department of Fisheries Biology and Genetics Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

Prawn hatcheries collected berried females from the Halda and the rivers of the Sunderbans where nurserers reared prawn PL up to juvenile in both pond and hapas. Polyculture of prawn with either tilapia or carp or both in ponds or dogis with commercial or farm made feed was practiced. A farm made feed named ‘Own formulated feed’ (OF) (protein 32%) was formulated for prawn brood development and its quality was compared with two other commercial prawn feeds- i) Quality shrimp feed (QF) (protein 26%) and ii) Mega shrimp feed (MF) (protein 37%). Growth performance and survival of F2 progenies of HB and OB origin was also compared in nursery phase for 56 days and in grow out phase for 240 days in earthen ponds. Five microsatellite loci were also used to assess genetic variation of three broodstocks and their progenies. Use of such captive reared hatchery originated broodstocks might cause high genetic erosion resulting inbreeding and lower output for aquaculture. On the other hand, microsatellite study revealed that genetic variability decreases in the progenies indicating the occurrence of inbreeding.

Keywords: Freshwater, Prawn hatcheries, Livelihood, DANIDA

Location: Noakhali

Start Date: 01-09-2009

End Date: 31-05-2012

Program Area: Animal Health and Management

Commodity: Prawn

Objectives:

1 To develop a protocol for the production of quality brood stocks of freshwater prawn as like wild ones and assess their quality and production performance. 2.To develop prawn farmers livelihood .

Methodology:

To develop a protocol for the production of quality brood stocks of freshwater prawn as like wild ones and assess their quality and production performance up to F₂ generation the present study was carried out with eleven experiments within a timeframe between 01 September 2009 to 31 May 2012. A survey was conducted through questionnaires to know the production and livelihood status of prawn growers, nurserers, hatchery operators of Noakhali region under DANIDA project. Prawn hatcheries collected berried females from the Halda and the rivers of the Sunderbans where nurserers reared prawn PL up to juvenile in both pond and hapas. Polyculture of prawn with either tilapia or carp or both in ponds or dogis with commercial or farm made feed was practised. To develop a protocol for the production of quality broodstocks in ponds, 180 juveniles of Macrobrachium rosenbergii, collected from the Bulla River, Noakhali were stocked in each of 6 ponds of size 600 m² (12 juveniles/40 m²) maintaining 1:2 male-female ratio at Southern Agro-Fisheries Ltd. (SAFAL), Subarnachar, Noakhali.

Source of Information: BAU Research proceedings, Vol.23, 2013, PP.70-71

Article Link (Online Journal):

Funding Source:

1. Danish International Development Agency (DANIDA)

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The major findings of the study that the breeding performance of F₂ berried females of HB and OB were also compared at UFWPH. There was no significant (P>0.05) difference in conversion rate of F₂ PL up to juveniles of HB (85.79%) and OB (71.30%) in nursery phase. In grow out phase, production performance of F₂ progeny of HB (450.17 kg/ha) and OB (425.35 kg/ha) exhibited no significant difference (P>0.05).The present study suggests that freshwater prawn hatchery managers should produce and maintain their own broodstocks by rearing wild juveniles with ‘OF’ in ponds as the same quality as wild ones which will ultimately help in conservation of wild populations of freshwater prawn of the country.

Knowledge Management: Report/Proceedings