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Appendix 2

Ministry of Agriculture and Water Resources:
Salem BamuflahDirector General of Agriculture Research Centre of the Western Region.
Fish Farm Centre Project: 
K. AllenProject Manager
S. A. Al-ThobaityProject Co-Manager
M. AradaFisheries Biologist
Feisal A. BukhariFisheries Biologist
Magd ElbawahHatcheries Responsible
Adel BadawiGeneral Service Responsible
Met also at FFC Project: 
Victor C. SalinSenior Budget and Financial Officer, from FAO, Riyadh, on mission in Jeddah
FAO Headquarters, Rome: 
Coche, A.G.Senior Fisheries Resources Office (Aquaculture)
Ziesler, R.Project Operations Officer
Padroni, G.Personnel Officer
Padlan, P.G.Senior Fisheries Officer (Aquaculture)
Vincke, M.Senior Fisheries Officer (Aquaculture)
Other persons in the FAO Fisheries Department:
Welcomme, R. L. 
Garcia, S. 
Kapetsky, J.K. 
Fig. 1

Fig.1: Diagram of the Shoreline Lagoon at the Fish Farming Centre Site, Jeddah

Fig. 2

Fig.2: Approximate limit of suitable depth (between 1 and 2 m deep) for fishpen at the Fish Farming Centre shoreline

Fig. 3

Fig.3 - Detail design for the two demonstration fishpens

Material and equipment:
- Ready made nets (210/60 – 14 mm) See detail in Fig. 6600 m1
- String 210/60   40 bobbins1
- Plastic needle No. 8 (Fig.7)    301
- Side poles (Fig.4B)  1701
- Corner poles (Fig.4A)    10
- Pressure line PVC (diameter 2 in) to join the pole tops (Fig.4a)   500 m1
- Sinkers (Fig.7)1 700 units1

1 For all the above, additional quantity included as spares

Fig. 4

Fig. 4 - The detail design for the two types of poles

Note: The length of part “c” must be adjusted when all the poles have been installed; it depends on the level of the maximum high tide. For a jumper species such as the mullet, part “c” should be made higher.

Fig. 5

Fig. 5 - Steps in constructing a side pole

  1. Prepare the bottom part (see Photo No. 1):

    1. iron rope, diameter 16 mm
    2. ordinary PVC, diameter 4 in
    3. jute bag holding the concrete (see Photo No. 1)

  2. Prepare the top part (see Photo No. 2):

    1. pressure line PVC, diameter 2 in
    2. reducer (ordinary PVC) 4 to 2 in

  3. Fill up the bottom part with concrete which needs to be well packed by stirring the iron rod and by slightly hammering the PVC (see Photo No. 3 and 4)

  4. Join the top and the bottom parts (see Photo No. 5)

  5. Fill up the top part

  6. Pole is ready after 24 to 48 hours

Fig. 6

Fig. 6 - Details of netting

  1. Net 210/60 – 14 mm, delivered from factory by sheet of 400 meshes (about 7 m wide and 40 m long), Half of the sheet with (200 meshes) will be used as net side barrier after being attached with a 10 mm diameter rope.

  2. String 210/60

  3. Special plastic needle

  4. 10 mm diameter rope

  5. Net 210/60 – 14 mm

  6. Mesh size: 210/60

  7. 14 mm is the distance between two knots

Fig. 7

Fig. 7 - Sinkers (see Photos 6, 7 and 8)

  1. Sinkers are made with ordinary PVC (diameter 2 in and 20 cm long).

  2. The diameter of the two extremes are slightly extended by heating.

  3. Fill up the sinkers with concrete.

  4. Diagram of a sinker.

  5. The sinkers are strongly attached on the bottom side of the net with string 210/60 (f).

Fig. 8

Fig. 8 - Net installation

1. Water pressure from a 2 HP water pump.

2. Furrow dug by water pressure.

3. & 4. Sinkers and net are carefully laid into the furrow.

5. Bottom furrow closing.

6. Digging direction.

7. Hose (diameter 2 in) used to orient the water pressure.

Fig. 9

Fig. 9 - Diagram of installed net

  1. -side pole

  2. -top edge of the fishpen

  3. -net 210/60 – 14 mm

  4. -water level

  5. -sinker

  6. -side of net needs to be tied to the side pole up to the top edge of the fishpen and to the pipes connecting the side poles.

Photo 1

Photo No. 1 - Preparation of the bottom part of the pole.

Photo 2

Photo No. 2 - Preparation of the top part of the pole.

Photo 3

Photo No. 3 - Filling pole with concrete.

Photo 4

Photo No. 4 - Filling pole with concrete

Photo 5

Photo No. 5 - Joining the top and the bottom parts of the pole.

Photo 6

Photo No. 6 - Fabrication of sinkers.

Photo 7

Photo No. 7 - Attaching sinkers to the bottom of the net.

Photo 8

Photo No. 8 - Attaching sinkers.


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