- This topic has 3 replies, 3 voices, and was last updated 12 years, 7 months ago by
.
-
Posts
-
Im aquarien magazin 1978 Heft 9 Seite 448 ff. habe ich von einer Methode zur Erbrütung und Konservierung von Artemia-Eiern gelesen. Dabei werden die Eier eine Stunde in 100 Milliliter Leitungswasser vorgeweicht und danach wird die gleiche Menge Chlorbleichlauge ( 5%iges Natriumhypochlorit ) dazugegeben und genau 25 Minuten stark durchlüftet.Nun sind die Eier geschält, müssen noch gut gespült werden und können jetzt zum Schlüpfen in Seewasser bzw. Salzwasser angesetzt werden. Will man sie jedoch konservieren, so nimmt man sie nach 3 Stunden leicht angebrütet aus dem Salzwasser und gefriert sie in kleinen Portionen ein. Wenn man sie braucht, auftauen wieder in Salzwasser ansetzen und nach verkürzter Brutzeit stehen Artemia-Nauplien zur Verfügung. Wer hat mit dieser Methode schon Erfahrungen gesammelt?
Dear “Schellfisch”, I have no experience myself with this method, but I know some German experts who work this way. And seen the good results. It does work indeed. It is quite useful if you have “bad eggs” that hatch to a low percentage only. Then you can avoid that mess with many unhatched eggs by removing the eggshells before. On the other hand avoiding the handling of any chemical solutions and the necessity of exact dosage is an advantage, too.
If anybody has used the method himself he should write on it here. If you want to get in contact with such persons I could help with addresses.I have some good experience with the decapsulation (which is a well known and described method). I hate the capsules in my tanks (at least some of them always get to the tanks and remain there forever) and it is claimed, that the nauplii hatched from the decapsulated eggs are more nutritious (no energy is spent to get out of the eggs). However I have never heard about freezing eggs during the hatching. Most sources I know recommend storage in brine or salt in a fridge (after dehydration).
A protocol from zebrafish.org: http://zebrafish.org/zirc/documents/protocols/pdf/Fish_Feeding/Live_Food/Artemia/Artemia_Decapsulation.pdf
A different method using cheaper chemicals: http://www.fao.org/docrep/field/003/AB909E/AB909E00.htm
- You must be logged in to reply to this topic.