Raw Material


I. Full view of Pangasius aquaculture 

The Pangasius catfish, known as ‘basa’ and ‘tra’ fish later on, has been found originated in the Mekong River. The river starting from Tibetan Plateau, China flows down through Thailand, Cambodia, as far as Vietnam and emties into the sea through a network of distributaries. In reality, the fish found by it nature highly migratory riverine in Lake of Tonlé Sap, Cambodia. In Vietnam, it proved susceptibly flourishing alongside the Mekong delta region.

 

Back to the context of historical aquaculture, probably as early as in 1950’s. At that time with the farmers were even so few but the cuture has been developed afterward with many wooden cages floating on the water surface of Mekong River and also in ponds along the river, both its posterior & anterior ramifications.

 

 

 

The cultivation of fish on floating cages has made a boom since then. But in reality, this proved insufficient in terms of mass production. And farmers changed their trend of old culture for the pond farming as we see at present. 

 

 

II. Aquaculture in ponds 

1. Pond care:

Now to prepare, each pond needs 500sqm at least and as larger as dozens of hectares depending on the size of farming. Its water depth is 1.5 – 2 m. Surrounding shores of the pond to be higher than the peak level of river flooding of the river in the cropping year. Nevertheless, it is recommended to arrange a drainage measure for emergency of overflowing the shores.

 

Treat the pond with great care and prepare for drainage emergency as follows:

- Drain off water in pond; remove all algae and aquatic plants and wild-life fish in pond, also weeds along the shores;

- Remove all sludges at pond bed, leaving only a thick layer of mud of 0.2-0.3m in bed;

- Fill all cavities or holes; repair every shorefronts and sliding walls;

- Use a lime to sprinkle throughout the pond bed, about 7 – 10kgs per 100 m2;  

- Dry under the sunshine the pond bed for 2 – 3 days;

- Finally, let water flow slowly into the pond with a filtering plate to prevent any strange fish or pests to go through.

 

2. Introducing fish into ponds:

- Choose fish that are healthy, parallel size, undamaged fins, active, lively and normal swimming patterns;

- Sizes ranging from 10 – 12cm; weighing 50 – 100g/ fish;

- Density from 15 – 20 fish/ sqm

 

3. Feeding:

It is recommended to make use of local feedstock to ensure an appropriate protein level of 15 – 20% as detailed below:

 

Formula 1

Formula 2

Formula 3

Feedstock

Ratio (%)

Feedstock

Ratio (%)

Feedstock

Ratio (%)

Rice bran;

Fish waste, heads, viscera;

 

Greens

 

60

30

 

 

10

Rice bran;

Corn starch;

Fish meal;

 

Greens

 

50

25

15

 

10

Rice bran;

Fish meal;

Oil cakes

 

Greens

60

20

10

 

10

Protein

attained

 

 

15 – 16

 

 

15 – 16

 

 

16 – 18

 

How to feed

- The feedstock is finely ground, mixed with a binder, powdered cotton for example, to eliminate any disintegrative reaction from feeds, then spread slowly feeding little by little;

- Feed fish twice daily, in daylight and sunset;

- Rating 5 – 7% / weigh.

 

 

4. Feed care

Be watchful on feeding diet to adjust a dosage accordingly. Be aware of hurry up state at the beginning but later scattered away when being well-fed. 

 

Ensure to maintain an ideal water conditions for fish health and growth. Despite the fish proved adaptably in a dense environment and rarely changed water supply, it is recommended to alter every 10-day period by half or 1/3 volume of water in pond.

 

5. Harvesting

At average, the nourshing time of fish is about 10 months when its size is up to 0.7-1.5 kg per each fish. After harvesting, make sure the pond must be drained up for next crops.

 

We positively cultivate the farms by ourselves to ensure the input of raw material  enough for the processing plant by 50%. The balance is derived from outside farmers by our associative contracts, but nevertheless it should be watchful by our skilled personnel to ensure the control of material supply and pests.    

 

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