PVC pipes or Monks ? Translated from English forum De: sarnissa-african-aquaculture-bounces@lists.stir.ac.uk [mailto: sarnissa-african-aquaculture-bounces@lists.stir.ac.uk] au nom de Raymond Mwangata Sent: 06 Mars 2010 08h30 To: sarnissa-african-aquaculture Mailing List Subject: Re: [Sarnissa moines-african-aquaculture] et de bornes-fontaines Merci de votre observation. Mais je voudrais relier au coût de la plupart des étangs je vois en Afrique de l'Est qui sont des semi systèmes intensifs et sont détenues par des agriculteurs du poisson à petite échelle au niveau de subsistance. Cela se traduit donc par le fait qu'il revient moins cher pour obtenir un tuyau de 2 mètres PVC comme un ouvrage de drainage par rapport à un moine? (is this correct translation?) qui exige des matériaux de construction et coût du travail que la plupart des agriculteurs ne peuvent pas se permettre. observe, Raymond Ministère du développement des pêches. Poste de pêche du Nakuru Rifty vallée region.Kenya. cell: +254722902914 From: sarnissa-african-aquaculture-bounces@lists.stir.ac.uk [mailto:sarnissa-african-aquaculture-bounces@lists.stir.ac.uk] On Behalf Of Raymond Mwangata Sent: 06 March 2010 08:30 To: sarnissa-african-aquaculture Mailing List Subject: Re: [Sarnissa-african-aquaculture] monks and standpipes thanks for your observation.but i would relate this to the cost of the two.most of the ponds am seeing in east Africa are semi intensive systems and are owned by small scale fish farmers at subsistence level.this therefore translates the fact that its cheaper to get a 2 meter PVC pipe as drainage structure compared to a monk which requires building materials and cost of labour which most farmers can not afford. regards, Raymond Ministry of fisheries development. Nakuru fisheries station Rifty valley region.Kenya. cell: +254722902914

Date: Fri, 5 Mar 2010 16:07:06 -0600 From: veverkl@gmail.com To: sarnissa-african-aquaculture@lists.stir.ac.uk Subject: [Sarnissa-african-aquaculture] monks and standpipes

Dear all, In the early 1980's we made a training manual for fish farming in Rwanda and one of the tables in the manual gave a comparison between monks and PVC standpipes as drainage structure for fish ponds. It also offered the cut-levee option for pond draining. In Kenya, we made a comparison between standpipes inside the pond and standpipes outside the pond during the various pond construction training programs that were held. As I look at the information coming out of West Africa, and from other visits, I see that the fish ponds still have monks and some of the newly constructed ponds use monks. Whereas in East Africa, almost all of the fish ponds have switched to PVC standpipes as drains, except for very large ponds, where a monk-type drainage structure is often less expensive. There are certain construction principles that must be followed for each and if they are not, then the functionality is severely compromised. I am wondering, however, why it is that there is such a difference between West Africa and East Africa; or is it only my imagination? Regards to all, Karen

Karen L. Veverica Department of Fisheries and Allied Aquacultures Auburn University, AL office: +1-334-844-4667 cell: +1-334-332-1560 cell in Uganda: +256 782-970622 http://www.ag.auburn.edu/fish/international/uganda

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