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UVI Aquaculture Systems

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Donald Bailey

on 23 October 2013

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Transcript of UVI Aquaculture Systems

UVI Aquaculture Systems
Four rearing tanks for tilapia production
spawns easily
eats manufactured diet
Market size tilapia
Biofloc system
Harvest of tilapia
Clarifier to remove solid waste
Vegetable crops irrigated with system water
Denitrifying tank
Stock each tank with 600 fingerlings
Stagger stocking at 6-week intervals
Feed 3 times daily
Complete diet, 32% protein
Floating pellet
ad libitum for 30 minutes
Drain solid waste at each feeding
Aereate with diffused air
Exchange water volume each 60-80 minutes
Aquaponic System
Biofloc System
Brood Fish &
Nursery System

Brood fish management
Important for farm's
Reliability of seed
timing of production
quantity needed

Producing and Hatching Eggs
Contact information
Training Schedule
UVI Horticulture & Aquaculture Program
Dilip Nandwani (340)692-4086 dndwani@live.uvi.edu
Donald Bailey (340)692-4038 dbailey@live.uvi.edu

Workshop Dates
January 29 - 31, 2014
March 12 - 14, 2014
April 23 - 25, 2014
June 4 - 6, 2014

Why Aquaculture
Declining marine fisheries catch
Savings over imports
Fresh quality
Food security
Why integrated systems
Intensive system uses less land
Poor soils for pond construction
Brown fields can be used
Recirculating system uses less water
groundwater is too salty for crop irrigation
surface water is limited
catchments collect rainwater
Integrated system recovers waste nutrients
Nitrogen waste for leafy growth
13 of 15 essential plant nutrients are in fish waste
Treatment Processes
Air stones, 22 in each rearing tank, 24 in each hydroponic tank
Solids removal, three times daily from clarifier
Filter tank cleaning one or two times weekly
Continuous degassing of methane, CO2 , H2S, N2
Denitrification in filter tanks
Direct uptake of ammonia and other nutrient by plants
Nitrification in hydroponic tank
Retention time: rearing tank, 1.37 h; clarifier, 20 min, hydroponic tanks, 3 h

Bird predation control
Mineralization of solids
Removal of solid waste
University of the Virgin Islands Horticulture & Aquaculture Program
Solid waste from biofloc system
Geotube for solids removal
Cucumber crop
24 plants/raft
2-week old seedlings
3 weeks growth to first harvest
3 weeks of production

12 plants per raft
3-week old seedlings
13 weeks growth to harvest
single harvest of all calyces

12 plants per raft
2-week old seedlings
4 weeks growth to first harvest
12 weeks production
3 x weekly harvest
Most productive of crops
Bibb - 88 plants per raft
3-weeks growth to harvest
Leaf - 60 plants per raft
4-weeks growth to harvest
Romaine - 48 plants per raft
4-weeks growth to harvest
48 plants per raft
3-week old seedling
4 weeks growth to first harvest
cut and come again regrowth
4 harvests before replanting
Romaine lettuce
240 plants per raft
plant sets
4 weeks growth to harvest
replant sets
Full transcript