F
frank
Guest
Hi all. In november 2004, I put my pair of N kaiseri in a breeding aquarium as I did in 2003. The male and female advertise their willingness to breed by the shape of their cloaca. In contrast to 2003, nothing happened until now... The main difference with the previous year was that the temperature was lower (between 11 and 13°C on average, compared to 15-17°C the previous year). The shape of the male cloaca even completely turned to its non breeding shape. This weekend, I raised the temperature to 15°C and the response was incredible: within 24 hours, the male cloaca was heavily swollen again and I noticed the first courtship behaviour. It thus appears to be important to keep temperatures above approximately 14°C for this species to perform breeding behaviour. On the other hand, these high temperatures appear not to be necessary for egg deposition and larval development since both continued in 2003 at temperatures between 10 and 11°C.