Effects of Fish Composition on Production of Underutilized Homestead Ponds in Salinity Challenged Area of Southern

Bangladesh

Md. Emdad Hossain, Harun Or Rashid, A.T.M. Eunus & Benoy Barman

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Presentation Outline

Background Objectives Study area Species composition Results How the solution would address the problem? Conclusion

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Brief background Bangladesh enjoys increased of fish production both in culture & open water But homestead pond production is decreasing in the salinity challenged area

of southern Bangladesh Fresh water and biodiversity is also decreasing

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The present study was conducted in Southern Bangladesh to observed the effects of fish composition on production of underutilized saline prone homestead ponds

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Objectives

To identify the suitable fish species in the saline prone pond To assess the survivality rate of different fish species To compare the growth and production of different fish species To identify the suitable fish composition in the saline prone area

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Study Area

The study was conducted in Pathuria and Kalibari village under Morelganj upazilla of Bagerhat district.

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Species Composition

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Treatment Species 1 Pangus (Pangasius hypophthalmus)

Silver carp (Hypophthalmichthys molitrix) Carpio (Cyprinus carpio) Mrigal (Cirrhinus mrigala)

2 Koi (Anabas testudineus) Catla (Catla catla) Carpio (Cyprinus carpio) Rui (Labeo rohita)

3 Tilapia (Oreochromis niloticus) Singh (Heteropneustes fossilis) Carpio (Cyprinus carpio) Grass carp (Ctenopharyngodon idella)

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Data Collection

Fish production, Mortality, Inputs (lime, fertilizer, feed) and Water quality (Dissolved oxygen, Temperature,

Conductivity, Total dissolved solid, pH, Salinity, Alkalinity and Hardness)

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Results

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Survival & Specific Growth Rate

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Pangus

Silver carp

Mrigal Koi Catla Rui Tilapia Shing Grass carp

Carpio

Survival, % 63.87 51.69 67.42 71.63 60.65 71.76 79.03 30.00 63.01 73.02

SGR, %/day 1.81 1.63 0.98 1.70 1.56 1.07 1.95 1.24 1.22 1.43

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Production

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Anova : Single Factor Groups Count Sum Average/dec Variance

T1 4 23.122241 5.78056026 0.020886377

T2 4 26.7401511 6.68503778 0.092084239

T3 4 30.2691058 7.56727644 0.067842528

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Express My Research Experience

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Based on production level, DoF, 2017 categorized extensive aquaculture in ponds with annual productivity less than 1.5MT/ha in Bangladesh.

The production of the current study (1428-1869kg/ha/year) was higher than extensive culture production reported by Mazid, 2002 (700 kg/ha/year).

Chughtai and Mahmood, 2012 (1198-1410 kg/ha/year) although they reported 32.5% decreased production in saline water-logged area.

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How the Experience would address the problem?

• The result shows that the salinity-challenged ponds can be utilized successfully with aquaculture.

• Based on the growth and survival it can be concluded that there remains potential for extra production

• This can boost production from homestead ponds and can contribute to increased household fish consumption.

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Final Words

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The homestead ponds in the saline prone area can play an important role to increase fish production, income and consumption in the

context of climate change events.

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