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Livestock Production
Thursday, July 07, 2011 6:11:51 PM
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Intensive Rearing of Mono-Sex Nile Tilapia and Silver Carp Under Mono-or Polyculture Systems at different Stocking Densities in Floating Net Cages

 
AM Abdelhamid
 
 
An experiment was carried out for 6 months on rearing Nile tilapia and silver carp, whether under monoculture or polyculture at different stocking densities. Four floating net cages (10 x 10 x 3 m) were used.
 

The obtained results revealed that the best treatment was the monoculture of all males mono-sex  Nile tilapia (10000 fish of 10g each/cage) followed by that of polyculture (5000 tilapia of 10g with 750 carp of 70g/cage) concerning their superiority in final bodyweight (235 & 545g/fish), bodyweight gain (225 &475g/fish), average daily bodyweight gain (1.21 & 2.55g), specific growth rate (SGR, 1.70 & 1.01 %/day), feed conversion rate (FCR, 2.41 & 2.45), feed cost/Kg bodyweight gain (7.78 & 5.89 L.E.), and economic efficiency (144.5 & 77.9%, respectively).

 
Moreover, the monoculture of all males mono-sex  Nile tilapia was also the best treatment in return (18855 L.E./cage) followed by the polyculture treatment (7500 tilapia of 10g with 1100 carp of 70g/cage) which gave return of 10868 L.E./cage.
 
 
For more of the article, please click here
                             

Article made possible through the contribution of Dr AM Abdelhamid.

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