5 million metr ic tons one qua r ter of sa lmon a nd

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Unformatted text preview: is a ppr ox 16. 5 million metr ic tons (one- qua r ter of sa lmon a nd shr imp pr oduc ed a r e ‘ fa r med’ ) Tr ends - wor ld a qua c ultur e pr oduc tion is inc r ea sing by 8% per yea r ; wor ld ' c a tc h' is inc r ea sing 1% per yea r In US - 340, 000 metr ic tons gr own la st yea r ; most widely r a ised fish is Cha nnel Ca tfish in Southea st (Mississippi, Ar ka nsa s, Ala ba ma , Louisia na ). In US ther e a r e 1, 320 c a tfish fa r ms with 177, 360 a c r es of ponds. Live c a tfish pr oduc tion 447 million pounds c ) Rough pr oduc tion da ta : In extensive systems of a qua c ultur e (low input systems) one typic a lly pr oduc es 300 to 500 kg of fish per hec ta r e of pond sur fa c e per yea r (1 a c r e = . 4047 hec ta r es); with mor e intensive pr oduc tion this c a n be r a ised into 1000 kg /hec ta r e/yr a nd wa y up into 10, 000 kg per hec ta r e for ver y intensive pr oduc tion; in ta nk a qua c ultur e with oxygen a dded to ta nks, ultr a filtr a tion of wa ter one c ould a ttempt to pr oduc e 2, 000, 000 kg per hec ta r e per yea r but suc h pr oduc tion is not susta ina b...
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This document was uploaded on 01/24/2014.

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