Optimal Size of Fish Pond for Socio-Economical Development of Cachar (Assam)

ȱ...ȱ(2)

Where,ȱ

ȱisȱtheȱproductionȱrateȱofȱtheȱfishȱ(kg/

ha/year),ȱ

ȱisȱtheȱtotalȱmassȱofȱfishȱproductionȱ

annuallyȱ(kg/year)ȱandȱ ȱisȱtheȱtotalȱsizeȱofȱtheȱfishȱ

pondsȱ(ha)

Results and Discussion

Sizeȱofȱfishȱpondȱplaysȱaȱveryȱimportantȱroleȱasȱfarȱ

asȱeconomicȱstatusȱofȱaȱfarmerȱisȱconcerned.ȱEveryȱ

Figure 2. Production rate of fish in very small size fish farms

farmerȱcan’tȱaffordȱaȱlargeȱsizeȱpond.ȱMostȱoftenȱitȱ

Further,ȱafterȱconductingȱsurveyȱforȱsmallȱsizeȱfishȱ

hasȱ beenȱ observedȱ thatȱ farmersȱ mayȱ alsoȱ increaseȱ

farm,ȱitȱhasȱbeenȱobservedȱthatȱtheȱaverageȱannualȱ

theȱ productivityȱ ofȱ hisȱ farmȱ landȱ byȱ hisȱ intenseȱ

productionȱofȱfishesȱisȱ1985ȱkg/ha/year.ȱTheȱannualȱ

labourȱandȱendeavour.ȱThus,ȱinȱtheȱpresentȱstudy,ȱ

productionȱ ofȱ fishesȱ forȱ smallȱ sizeȱ fishȱ farmȱ isȱ

itȱ isȱ importantȱ toȱ knowȱ whetherȱ theȱ annualȱ fishȱ

depictedȱinȱFigureȱ4.10.ȱDuringȱsurvey,ȱitȱhasȱbeenȱ

productionȱ inȱ Cacharȱ districtȱ isȱ influencedȱ byȱ theȱ

observedȱ thatȱ theȱ annualȱ productionȱ ofȱ fishesȱ forȱ

farmȱsizeȱorȱnot.

suchȱfishȱfarmȱvaryȱfromȱ761ȱkg/ha/yearȱtoȱ2650ȱkg/

Forȱ compilationȱ ofȱ resultsȱ inȱ moreȱ exhaustiveȱ ha/year.ȱTheȱproductionȱrateȱofȱfishesȱinȱcaseȱofȱsmallȱ

way,ȱ theȱ pondsȱ (whichȱ isȱ alsoȱ calledȱ fishȱ farm)ȱ ofȱ sizesȱfarmȱisȱremarkablyȱmoreȱthanȱveryȱsmallȱsizeȱ

Cacharȱ hasȱ beenȱ dividedȱ intoȱ fourȱ typesȱ whichȱ isȱ fishȱponds.

basedȱ onȱ itsȱ size.ȱ Theȱ smallestȱ pondȱ isȱ termedȱ asȱ

veryȱsmallȱpondȱhavingȱareaȱlessȱthanȱ0.3ȱhectare.ȱ

Pondsȱhavingȱfreeȱsurfaceȱareaȱofȱ0.3ȱtoȱ0.5ȱhectareȱ

areȱtermedȱasȱsmallȱponds.ȱFurther,ȱmediumȱpondsȱ

areȱ thoseȱ pondsȱ whichȱ hasȱ surfaceȱ areaȱ betweenȱ

0.5ȱandȱ1ȱhectare.ȱThoseȱpondsȱhavingȱsurfaceȱareaȱ

moreȱthanȱoneȱhectareȱisȱtermedȱasȱlargeȱponds.ȱTheȱ

annualȱproductionȱofȱfishesȱhasȱbeenȱdeterminedȱbyȱ

collectingȱdataȱforȱallȱtypesȱofȱfishȱfarm.ȱTheȱresultsȱ

suggestȱ thatȱ theȱ averageȱ annualȱ fishȱ productionȱ

forȱ veryȱ smallȱ sizeȱ farmȱ isȱ 1703ȱ kg/ha/year.ȱ Theȱ

productionȱrateȱofȱfishesȱforȱveryȱsmallȱsizeȱfarmȱhasȱ

Figure 3. Production rate of fish in small size fish farms

beenȱ shownȱ inȱ Figureȱ 4.9.ȱ Fromȱ thisȱ figure,ȱ itȱ canȱ

beȱ depictedȱ thatȱ theȱ maximumȱ annualȱ productionȱ Forȱ mediumȱ sizeȱ fishȱ farms,ȱ itȱ hasȱ beenȱ observedȱ

ofȱfishesȱinȱsomeȱofȱtheȱveryȱsmallȱfarmȱmayȱreachȱ thatȱ theȱ annualȱ fishȱ productionȱ variesȱ fromȱ 1028ȱ

toȱ2091ȱkg/ha/year.ȱThisȱmayȱbeȱachievedȱbyȱsomeȱ kg/ha/yearȱtoȱ3636ȱkg/ha/year.ȱFigureȱ4.11ȱpresentsȱ

ofȱ theȱ farmersȱ withȱ adoptingȱ properȱ managementȱ productionȱrateȱofȱfishȱforȱmediumȱsizeȱfishȱfarm.ȱTheȱ

practicesȱinȱtheirȱfarmȱlands.

averageȱannualȱproductionȱinȱthisȱcaseȱisȱ1815ȱkg/ha/

year.ȱTheȱproductionȱhasȱincreasedȱasȱcomparedȱtoȱ

veryȱsmallȱandȱsmallȱsizesȱfarm.

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