we are using polarised artemia cysts and getting 1.7 g Instar I for each 1 g cysts and sometimes we get less than that. we put them in 29C, 35ppt and lots of agitation
any tips are welcomed
thank you all
Temperature is okay (< 30C), salinity should be 25 ppt, pH should be > 8, illuminate, constant aeration, 1g cysts/litre, use hatching cone, and incubate 24 hours.
I hope this helps!
No airation, sea water salinity & place the water filled (say upto 80%) aquarium directly under sunlight. It takes maximum 3 days at the most to get viable cycts to get hatched.
thank you all but how much yield i.e. gram cyst to gram instar I
Chadravadan we have to have them hatched indoors
The success depends in part on the age of the cysts and storage, low temperature dry.
There are many variations of how to achieve, as many as users. I wash with hypochlorite 5 to 10%, I wait color change dark to light brown, one to 3 minutes. I wash them very well. Then Salinity 15%, usually half seawater, half-freshwater. Temperature 26 to 28 degrees, many aeration, light 800 lux. 80 to 90% success to 24 hours, the rest in 48 hours.
The polarized cyst is to remove the cyst with magnets in a tube and collect clean the nauplio
yes the polarised cysts are magnetised. although they are more expansive but if you consider the time and the chemicals to decapsulate it works out much better.
thanks for all your answers
The most effective method to increase the hatching of artemia cysts is the method of freezing. For this dry artemia eggs (cysts) are placed into a saturated NaCl solution and placed in freezer compartment (-18 - 25 ° C) for a week or more (up to two months). Increase the percentage of hatching of artemia, at least on 10% can be freezing eggs during 5 days. Much depends on the initial quality of artemia eggs and store them. Upon receipt of live crustaceans of artemia, the main thing that was a good aeration of the water (the eggs are not accumulated at the bottom), sufficient salinity and temperature 24 - 30 degrees.
thank you Denis
do you mean the cysts we buy we should put them in saturated NaCl, freeze at -18 to -25 for at least 5 days then put them into the hatching container?? 10% increase is great if I understood you right!!
Are you using an artemia cone? I found the greatest success with those and constant aeration. I agree with Andrew in terms of temperature etc. Depending on what you are using them for, you may want to consider gut loading them to increase nutritional value, that may help compensate for lower than desired numbers of artemia.
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