Tilapia are an African fish that are easy to grow without supplemental feed or other
expensive inputs. They consume algae, some floating plants, and small water animals. They can be easily grown in a shallow pond with the fish. All that is needed is some compost to fertilize the algae.
We are hoping to get the FOOD MACHINE at or Arcahaie TEACH Center; a combination of tilapia tank and green house.
Click this link and watch the video from Kona Hawaii how Aquaponics and hydroponics can work together to grow more Meat and Produce!
A tilapia production system for Haiti has been developed by the Marine Biological Laboratory on Cape Cod. Read all about this simple productive system in ECHO's newsletter 105 and 105 supplement which can be downloaded from:
read more about the project at:
Tilapia Ponds, Cormier Valley, Haiti
Harvesting Tilapia, March 2008
Very informative correspondence between: Bill Mebane and Dan Janzen
----- Original Message -----
I am working with a group of Guambiano Indians in Colombia in an area that has a large number of trout farms at 2300 to 2500 meters (7500 feet). They are looking to economize in fish food and I am trying to find a way to help them do that. I think they could come up with some money for some type of pellitizer.or extruder. I believe we can get protein from Calliandra leaves and from beans (also carbohydrates) such
as Jack beans, Lablab, or Velvet beans used for intercropping with corn. I think it would be best to cook the meal first to denature tannins and other antinutritional factors and then pelletize it. I understand that we probably should add some type of oil to the feed. Usually the source is fish oil. How are you doing with developing a food source for Haiti for the tilapia? Any progress or new ideas? We need about 25% protein I believe. Is soldier fly larve needed if one already has 25% protein?
Our experience is mostly with Tilapia and they are able to utilize plant protein much better than trout. Detoxifying and/or removing anti-nutritional components of the plants you mentioned is not easy, cooking will help. Moringa is also one of the powerful plant ingredients you can use...I'm sure it grows in Colombia but maybe not at the altitudes your fish are.
Cassava flour is a great binder, we use it at ~1-2% inclusion, it gets its "sticky/binding" trait when heated to appx 103F.
If I were faced with your challenge I would focus on black soldier fly larvae as a protein source. In the early years of the trout industry here in the USA, trout production only became commercially feasible with the use of fly larvae - horse heads would be hung over the ponds and maggots falling from the rotting meat produced ALOT of fish. Not a pretty sight but it worked.
Dried blood meal is also a key ingredient that will help boost protein. I have never had much luck with producing trout with anything less than a 38% protein feed...
Some folks are having luck using Bio-floc w/salmonids, if I can find some good refs. and papers I will send them to you. Regarding oil, lipids are important, fish oil is best but moringa or peanut oil may work also, storing the feed becomes an issue when oil is involved. Trout are picky eaters so you may run into some "palletability" issues w/your homemade feed....the closer you stick with insects the easier it will be to make the feed tasty. Red and or white worms also work really well w/trout.
I hope this helps a bit, let me know if I can be of any help further.
Duckweed and Azolla are waterplants that are also excellent Tilapia food.
Agromisa has several aquaculture publications:
Small Scale Freshwater Fish Farming
On Farm Fish Culture
La pisciculture à petite échelle en eau douce
La pisciculture à la ferme