Hi Jonathan and all,
What I wanted to point out was just how quickly Notho. eggersi mature. It is true that in warmer temp. the metabolism of living things is faster but both the eggersi and the guentheri are exactly in the same similar conditions, temp.around 23C. The eggersi males have grown to 2cm. while the guentheri are 1.5cm. Females of both species are only 1 cm long.
While the males from the eggersi are courting the females and spawning, the males from the guentheri are still sparring with each other and no interest at all in the females. Remember, both species are only 19 days old today!
No I have not collected any eggs off them. Infact, today I isolated the females in another tank so that they will keep growing and will only put them with the males when they reach their full size, otherwise the females will remain very small and waste away very quickly.
Aphanius mento and Aphanius dispar Richardsoni, both of which are in outdoor ponds all year round, have started to spawn. Anyone interested in some eggs or later young specimens, let me know.