FEASIBILITY OF EARLY SHRIMP FARMING WITH OVER-WINTERED GALDA ( Macrobrachium rosenbergii) JUVENILES

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RAISING AN EARLY PRAWN Macrobrachium rosenbergii
CROP WITH OVER-WINTERED JUVENILES TO INCREASE
FARM INCOME AND REDUCE RURAL POVERTY IN BANGLADESH
By Mahmudul Karim
Bangladesh Shrimp Foundation
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2. TABLE OF CONTENTS

1. Coverslide
2. Table of contents
3. Background 1
4. Background 2
5. Problems of seed availability
6. Questions
7. Test culture with over-wintered prawn juveniles
8. GRAPH-1 A Water temperatures in experimental
   ponds in Sujanagar, Pabna
9. GRAPH-1 A Water temperatures in experimental
   ponds in Phulpur, Mymensingh
10. Gist of production results
11. TABLE-3 Extrapolated cost / benefit / ha
12. Prawn hatchery and farming schedule
13. Findings and Recommendations 1
14. Findings and Recommendations 2
15. Thanks

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3. BACKGROUND - 1

• Income increase from the shrinking agricultural
  lands, particularly in low-lying mono-crop areas
  is essential to reduce rural poverty
• Farmers in mono-crop low lands benefit from
  farming high priced prawn alternating with paddy
• With expanded family sizes, generated new needs
  and constantly increasing living cost, farmers
  need further income enhancement from their
  limited lands
• Contd..

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4. BACKGROUND - 2

• Prawn farming presently limited only to the
  second half of the growth period ability to
  raise two prawn crops a year could have greatly
  boosted up rural economy
• First half remains unutilized due to
  unavailability of prawn fry or fingerling and
  water
• Fry from hatchery or the wild not available
  before May

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5. PROBLEMS OF SEED AVAILABILITY

• Fry from hatchery or wild not be available in
  large numbers before May
• Post larvae produced after July have little
  demand so prawn hatcheries do not produce any
  post larvae beyond July

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6. QUESTIONS

• Is it possible to successfully over-winter late
  season Galda juveniles?
• Will the stunted over wintered juveniles
  demonstrate sufficiently fast compensatory growth
  when exposed to next growth season in February?
• Will farming with over-wintered juveniles be
  economically attractive?

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7. TEST CULTURE WITH OVER-WINTERED GALDA
JUVENILES

• With WorldFish Centre (WFC) support, the author
  conducted some experiments from 29 October to 25
  May to answer above questions
• Experiments were conducted in farmers ponds at
  two places between 24 and 25o N latitude
• December January water temperatures fell to 16
  -22 C temperature rose to 32 C in May
• No artificial aeration at any stage

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8. GRAPH-1 A Water temperatures in experimental
ponds in Sujanagar, Pabna
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9. GRAPH-2 B Water temperatures in experimental
ponds in Phulpur, Mymensingh
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10. GIST OF PRODUCTION RESULTS
Parameters Pabna Mymensingh Mymensingh
Parameters Pond 1 Pond 1 Pond 2
Pond area (m2) 350 767 476
Experiment period 29 Oct 16 May 25 Oct 19 May 25 Oct 19 May
Prawn initial av. wt. (g) 6.8 0.9 0.9
Stocking /m2 2.86 1.43 3.57
Final av. wt (g) 74.72 61.96 60.17
Survival () 79.5 77.18 75.71
Productnion (Kg.)/ ha 1,677 677 1,605
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11. TABLE-3 Extrapolated cost / benefit / ha
Parameter S.nagar Phulpur Phulpur
Parameter Pond - 1 Pond - 1 Pond - 2
Prawn prodn. cost (Tk)/ha 268,714 89,152 188,802
Prawn fish prodn. Cost(Tk)/ha 268,714 96,649 200,357
Extrapolated sale / ha 644,914 222,88152,933 275,814 528,46682,058 610,524
Extrapolated Gross Profit/ha 376,200 US 6,270 179,165 US 2,986 410,167 US 6,836
1. Cost Tk 5.00/juvenile in Phulpur fry price
was Tk 2/piece 2. Shrimp _at_ Tk 380/Kg for
Sujanagar Tk 325/Kg for Phulpur Fish _at_ Tk
70/Kg 3. Labor cost not included
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12. RECOMMENDED PRAWN HATCHERY AND FARMING
SCHEDULE
Farming Farming Month Month Month Month Month Month Month Month Month Month Month Month Month Month Month
Farming Farming J F M A M J J A S O N D J F M
Boro paddy Boro paddy
Aqua. grow. period Aqua. grow. period
Hatchery Current
Hatchery Projected
Wild Current
Nursery Projected
Prawn growout Current
Prawn growout Projected
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13. Findings and Recommendations - 1

• Late season Galda juveniles can be successfully
  over wintered and profitably used for raising an
  assured early crop of Galda
• An early prawn crop plus a traditional prawn crop
  may significantly increase farmers income from
  their land
• Proper extension of the results may generate
  demands for late season PL and juveniles and
  therefore trigger hatchery operation over an
  extended period

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14. Findings and Recommendations - 2

• Extended hatchery operation, nursing and farming
  and the resultant increased production,
  marketing, export, etc will increase domestic
  sales, export, income and related other economic
  activities
• WorldFish Centre (WFC) may
• - Organize training and extension for commercial
  application of the technology
• - Prepare and distribute extension materials
• - Organize joint workshops with farmers,
  hatchery operators and bankers

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Pictures to add
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Thank You