COQUILLA, Kristine Babe B.
ICHON, Joshua Erin
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Cage culture originated in Kampuchia about 200 years ago.
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Originally cages were used to transport fishes alive from
the capture area to the market area.
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Cage farming is a more recent development than the
fishpens in the Philippines.
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Culture of Milkfish in fishpens began in 1971 while the
culture of Tilapia mossambica in floating cages began in
1976 in Lake Laguna.
Circular
 Rectangular
 Polygonal
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4
6
Common
Materials for
Cage
Construction
• Durable
• Nontoxic
• Rustproof
• Elastic
• Wood
• Steel
• Plastic
HDPE Pipes
 Filling Material for Pipes
 Brackets
 Stoppers
 Nets for Fish Cages
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HDPE Pipes
Brackets
EPS Blocks
Stoppers
Nets for Fish Cages
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Nylon Nets
Knotted Nets
Knotless Nets
Mesh Type
Mesh Size
Twine Size
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A. Site Selection
1. Availability of fingerlings at reasonable prices.
2. Depth - Not less than 1 meter at lowest water level.
3. Wind and current direction - The ideal site is on the leeward
side of the prevailing winds with moderate flow of water.
4. Water condition - Turbid and polluted water should be
avoided.
5. Cheap labor in the locality.
6. Lake substratum - Muddy-clayey-loam soils are suitable
substrates. Lake bottoms with too much silt and decaying
organic matter should be avoided.
7. Security - The fish cages should be guarded against
poachers.
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B. Design and construction
The fish cages are of various shapes - circular, square
and rectangular. Construction of the fish cages is done
with netting materials (e.g., kuralon and nylon),
bamboo poles and nylon rope. The poles are staked in
the mud at depths of 15-30 cm or more depending on
the substratum.
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C. Transport and rearing of fingerlings
Fingerlings are transported from source either by
means of a live fish boat or in oxygenated, water- filled
plastic bags. The fingerlings are acclimated in nursery
pens for 5-6 hours or for as long as 2-3 weeks after
transport to prevent stress and reduce predation.
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D. Stocking and management of fish cages
From the nursery pen, the fingerlings are stocked at
30,000/ha in the rearing pen where they are grown to
marketable size (200 g or more).
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E. Cropping pattern and harvesting
Fish cage operator differs in number of cropping per
year. Some operators stock once a year or twice a year.
Harvesting of marketable- size fish is done by the use of
seines, gill nets or cast nets.
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A. SITE SELECTION
1. Good water quality.
2. Water depth of at least 0.5 m. for the fixed type.
3.Two meters for floating cages
4. Protection from strong winds and currents
5. Accessibility to market and source of fingerlings.
B. Fish Cage Design and Construction
Construction
and
:
Design
A. Square/Rectangular
B. Circular
5mx5mx4m Nettings of Fish Cage
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B. Fingerling Transport
◦ Transport fingerlings in oxygenated water in plastic
bags.
◦ Leave about 15 cm space at the top of each bag for air.
◦ It is advisable to transport fingerlings in the early
morning or late afternoon to avoid drastic change in
temperature during noontime.
◦ Place ice at the sides of the bag to maintain the water
temperature.
C. Acclimatization
◦ Fry/fingerlings should undergo acclimatization.
◦ Fry acclimatization should be done in in-door tanks or
aquaria.
◦ It is easier to acclimatize the smaller fry than fingerling.
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D. Stocking
◦ Stocking densities in cages depend on the natural
fertility of the water body and on whether
supplemental feeds are given or not.
◦ As a rule, intensive stocking will require artificial
feeding especially when natural food in the water is
not enough.
◦ Upon the arrival, allow the packing bag to float 15 min
in your cage
◦ When the fry or fingerling have adjusted to the water
temperature, open the bag and slowly allow the
fry/fingerlings to come out.
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E. Harvesting
◦ The stock may be totally or selectively harvested.
◦ Harvesting is done when each fish reach 200-300 g.
◦ During harvest, the bottom net is lifted gradually
from one side and the fish are scooped out from the
other side.
◦ For large cages, four to five persons are required to
remove the fish out of the net.
Fish Cage in Sual
Pangasinan
Species Cultured:
• Milkfish
• Red Snapper
• Green Grouper
• Pompano
• Siganid
Mariculture Park in
Balingasag, Misamis
Oriental
Species Cultured:
• Milkfish
• Pompano
• Siganid
Species Cultured:
• Tilapia
SEA CAGE
OF ALSONS AQUACULTURE
CORPORATION MALALAG
BAY, DAVAO DEL SUR
Species Cultured:
•Milkfish
Ambuklao Fish Cage
Species Cultured:
•Tilapia
•Crimson snapper
•Silver carp
Fish Cage In Taal Lake
Species Cultured:
• Tilapia
SIBADAN FISH CAGE
AND RESORT
Species Cultured:
•Stingray (for safety
purposes its spike has been
removed), baby sharks,
•Talakitok
•Triggerfish
•Lobsters
•Crabs and
•Smaller talakitoks
THANKS!