Aquaculture

Aprovecho operates a 2,400 gallon recirculating aquaculture system in a solar heated greenhouse on the campus. Currently, Tilapia are being raised as the primary crop.

The system has a capacity of 700 – 1,200 fish and is designed to produce 1000 pounds of fish per season. 

Growing to love growing tilapia

The fish grew to love me as the hand that feeds them. Every time i walked by the tank they would start churning at the surface, and at feeding times they devoured all of the food that i gave them. At that stage they were getting a fingerling food (from our project partners at Jim’s Online Fish Shop) at 4% of their body weight per day. That worked out to approximately 1/4 cup food, three times / day. Continue reading

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It’s Alive (and green)!

The acclimation of both the main tanks and the fry tanks is going well. We added approx 5 lbs of fresh chicken manure to the main tanks (in a mesh bag) which brought the ammonia and phosphate levels up from … Continue reading

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Fish Fry (that’s a baby fish, not a taco filling… yet)

The fish are due to arrive in 3 weeks. 1500 baby tilapia fry. They will weigh approx 1/2 gram each and be about 1 inch long. The biggest challenge to raising Tilapia in the Pacific Northwest will be maintaining warm … Continue reading

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Aquaponics: Part II

Aquaculture system plan view

The recirculating aquaculture system (RAS) at Aprovecho was designed mainly to raise as many tilapia as possible while keeping external inputs to a minimum. Some RAS systems balance hydroponic vegetable production with fish production (Aquaponics). Some of those systems can … Continue reading

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Aquaponics: Part I

Aquaculture

Try to think about the last time you were strolling through a grocery store and you began to feel that slight chill that creeps out from the refrigerated meat and seafood cases and into your bones as you peruse the … Continue reading

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