bootstrapping aquaculture from …...bootstrapping aquaculture from production to marketing in...
TRANSCRIPT
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BOOTSTRAPPING AQUACULTURE
FROM PRODUCTION TO
MARKETING IN DEVELOPING
NATIONS
A Case Example from Liberia by
Joseph R. Sullivan
This project was funded by USAID’s Farmer-to-Farmer Program
and executed through ACDI/VOCA
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What do you do when you want to raise and sell
fish, you have little money and there are few
supplies/equipment you can buy even if you did?
1. Pond?
2. Species?
3. Spawning?
4. Feeding?
5. Value added?
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Building a Pond
US Peace Corps came to Liberia in the
1980’s, taught fish farmers how to build
fish ponds, but for tilapia, not catfish.
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Tilapia Pond
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African Catfish Pond
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Species? Nile Tilapia?
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Species? Blue Tilapia? (not native but widely available in Liberia)
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Spawning Tilapia?
Spawning
is easy,
stopping
them from
spawning
is hard.
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Tilapia Birth Control
Hand sexing
for all males
can be
tough,
easier as
the fish get
bigger or as
skill
improves.
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Paint, verify, practice until ink not
required on increasingly smaller fish
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Tilapia All-Male Hybrids -
Male Blue x Female Nile
Can be effective, but requires separate
gender, species broodstock ponds, etc.
Co-operatives allow some people to
produce fingerlings, and some growout
food fish.
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Tilapia All-Male Hybrids
Using Methyltestosterone
Too expensive for individual small scale
farmers
Would have to be imported
A larger co-op could pull it off, with one farmer
producing fingerlings and selling to grow-out
farmers
Long range problem would be selling to EU,
but local demand would put that in the distant
future.
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African Sharptooth Catfish
High demand = good.
Not interested in spawning in ponds
without “encouragement” = bad.
Carnivores higher on the trophic scale
demand higher quality feed = difficult.
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Artificial Hormones
Not locally available in Liberia
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Not Too Hard to Find the Pituitary, all needed materials are locally available
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Augustine
Moore
Went from
$50US to
$5,000 US
annually from
fish sales
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Spawning Female
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Cutting Testes for Sperm (consider a garlic press if you can find it)
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Adding Eggs to Incubation
Tray
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Water lettuce - floats fry swim away,
must be insect free
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Catfish Larvae to Fingerling
Trickier than tilapia fry to fingerling.
There are ways to concentrate and harvest rotifiers and
zooplankton from fertilized ponds (e.g. homemade
plankton net) to supply nursery ponds
Concrete nursery tanks are better than earthen ponds,
easier to feed chicken egg yolk, dried blood, brine
shrimp (but these need to be imported)
Co-op divides farmers into fingerling producers and
grow-out farmers
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First Feeding
• Artemia may be purchased (not very practical
for Liberia) - follow directions to hatch eggs OR
• Sieve green pond water through window screen
to remove insects then add directly to rearing
container or filter water through cloth and scrap
filtrate into container - provides necessary
zooplankton OR.
• Create bloom in earthen pond through
fertilization.
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supercharged Science
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Feeding Tilapia
Subsistence farmers fertilize ponds
with garden wastes, high-nitrogen
leaves, manure.
Better results with all males
Better results with stakes for periphyton
Better results with food.
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Feeding Catfish
Predator fish, not worth it without food.
Higher protein needs than tilapia
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Feed References El-Sayed, A.-F. M. 2006. Tilapia Culture. CABI Publishing.
Oxfordshire, UK/Cambridge, MA, USA.
Hertrampf, J. W. and F. Piedad-Pascual. 2000. Handbook on
Ingredients for Aquaculture Feeds. Kluwer Academic Publishers.
Dordrecht, The Netherlands.
Lim, C., C. D. Webster and C-S. Lee (Eds.). 2008. Alternative
Protein Sources in Aquaculture Diets. The Haworth Press. New
York and London.
Stadlmyr, B. et al. 2012. West African Food
Composition Table. Food and Agriculture Organization
of the United Nations. Rome.
Webster, C. D., and C. E. Lim (Eds.). 2002. Nutrient Requirements
and Feeding of Finfish for Aquaculture. CABI Publishing. Oxon,
UK/New York, USA.
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No Feed Mills. What to Do?
A few commonly ingredients, like rice
bran, are available in Liberia and wheat
bran is fairly inexpensive to buy.
Some traditional ingredients of tilapia
and catfish feeds are available, but
more important for human food.
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Get a Grinder
Locally available meat grinders are
about $25 US in Kakata, Liberia (avoid
using rice bran as it ruins the die)
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Focus on Unused but
Valuable Wastes
Blood and other wastes from abbatoirs, co-
ops help get for everyone.
Brewers grains available in Monrovia, co-ops
can organize to get enough up-country for
everyone.
Cooked chicken entrails
Some high-nitrogen (green finger) garden
wastes
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Blood Meal
Positive effects to 5%, pathological effects at
17.5% in salmon
Recommend 5% for juveniles, to 10% for
adults Nile tilapia, no more than 50% of
protein coming from blood.
52% blood meal + 32% algae meal better for
Clarias lazera than either alone
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Brewer’s Grains
available in Monrovia, acquired
through co-op
Dry-matter - 92.3%
Crude Protein - 25.9%
Crude fat - 7.0%
Ash - 4.3%
Crude fiber - 14.4%
N-free extract - 44.5%
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Brewer’s Grains in Diet
African catfish (Clarias gariepinus) 10%
Tilapia discolor 12 - 19%
Recommended 10 - 15%
**Pelletizing ability low, lessens water
durability
**Cost/kg of tilapia produced better
than for fish meal.
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Nile Tilapia
Supplemental Feeds
Rice bran
Maize meal
Copra meal
Coffee pulp
Brewery by-products
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Palm Kernel Meal
15 - 18% crude protein (20 - 25% if from Nigeria)
Deficient in lysine and methionine
Fiber high
Ca:P ration good
Good source of manganese
More suitable for extensive farming and herbivorous fish (5 - 10%) dt
high fiber than carnivorous fish (3 - 8%)
Tilapia prefer dark or red feed, so should be attracted to it
Otherwise may be discarded from local oil production.
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Palm Kernel Meal
Water - 13.5
Protein - 6.1
Fat - 55.3
Carbohydrate - 19.6
Fiber - 4.0
Ash - 1.5
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Maize
Energy food
Maize meal has a high pelletizing ability
Reduces pH in pond
Extruding maize meal improves digestibility &
optimizes protein use
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Maize
Clarias anguillaris fingerlings fed maize
bran, fish meal, blood meal and
groundnut cake gave better growth and
performance than other locally
available feedstuffs, but maize bran
alone (11.1% crude protein) gave poor
results
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Flying, Dried Ants
Water - 2.9
Protein - 38.8
Fat - 46.9
Carbohydrates - 5.5
Fiber -
Ash - 5.9
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Bamboo Caterpillar, Deep Fried
Water - 4.5
Protein - 25.5
Fat - 55.3
Carbohydrate - 11.0
Fiber -
Ash - 3.7
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Cattle Manure
Mixed with rice bran, good performance
and early sexual maturity of
herbivorous/ominivorous fish
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Egg Powder
A complete food
High feeding value, particularly for fry
Often included at 1 - 3 % of fish feed.
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Amaranth
High in lysine, a limiting
factor in many other
plant feeds
Use in fish culture?
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Borbor John - weed related to Amaranth
Civil War survival food
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Types of Fish Preservation
• Refrigeration
• Canning
• Freezing
• Drying/Smoking
• Pickling
• Microwave
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Fish Deteriorate Rapidly
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Alive is Always Best
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Alive is Always Best
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Alive is Always Best
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#1 Key to Success:
• Ice, Ice, Baby!!!!! • You need a co-op in Liberia,
• Propane, not electric
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Smoking/Drying
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Refrigeration (Co-op Required)
• 5o C still allows bacteria and molds to
grow, but more slowly
• Safety of refrigerated foods depends
upon the condition of the fish when it
went into the refrigerator, conditions in
refrigerator, and the length of time it has
been in the refrigerator.
• If it smells bad, has obvious mold or
bacterial growth, get rid of it.
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Freezing (Co-op)
• Stops mold and bacterial growth
• Does not kill all bacteria
• Does not stop oxidation if still exposed to
atmosphere - rancidity can still occur.
• Vacuum packing stops or severely slows
oxidation
• Different species react differently to freezing.
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Canning - Co-op orders equipment/supplies
through household goods stores in Monrovia
• Canning is easy
• It is economical to can
• Canning allows storing in quantity
• Easy to keep
• Easy to see and identify in clear glass jars
• Freezers not always available
• Safe food
• No storage costs
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Canner with Gauge
• $100US
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Canning Jars and Lids - Co-op
(require deposit on jars)
About $1US/
jar with ring
and lid Lid about
$0.50US
Reusable Ring
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Canning Over Traditional Charcoal Fire
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Conclusions
• Hand-sexing for all male-tilapia is doable with low labor
costs, hybrids require area co-op fingerling producers
• Pituitary spawning of catfish is practical, but one catfish
fingerling producer supplies growers in an area
• Focus on novel feed components that are nutritious but
not in demand for human food
• Better fish quality = higher prices
• Co-ops help get the equipment/supplies individual farmer
can’t get.
• Co-ops create division of labor/sectors