Live food aquaculture training course Demonstration of Artemia decapsulation.

Live food aquaculture training coursewww.aquatrain.org

Demonstration of Artemia decapsulation


Background

Alveolar layer of the cyst are removed


Why decapsulated cysts?

A complete contamination free and sterile product

Separation problems after hatch are avoided


Preparation

Tank set-up with stainless steel filter and aeration system

Addition of water and strong aeration


Hydration

Dry cysts are hydrated in water with strong aeration


Addition of chlorine and caustic soda => increases pH above 10

Addition of chlorine and hypoclorite solution

Temperature should be maintained within 25-30C


Colour change

1. Dark brown

2. Grey

3. Orange

The process is stopped immediately after orange colour appear

Process lasts from 5-15 min


Checking of bouyancy

Decapsulated cysts will sinkNon-decapsulated cysts will float


Termination of process Process is stopped by adding large amounts of water

until the smell of chlorine has disappeared

• Hypoclorite residue absorbed by the cysts is neutralized by

0.1 % Sodium Thio-sulfate


Transfer to hatching tank

Live food aquaculture training course Demonstration of Artemia decapsulation.

Documents

c slide

strong aeration slide

sodium thiosulfate slide

addition of chlorine

nondecapsulated cysts

termination of process

hydration dry cysts

smell of chlorine