* * *

At the end of April, the females from Unio crassus started to release the larvae.
The larvae are collected, counted and then placed in a tank with a host fish (minnows). After the larvae have attached to the gills of the host fish (after about 30-45 min), the host fish are placed in the mussel seed winning installation. Here, the young mussels can be collected after a few weeks.

- [![Mussel seed winning installation](/thumbnails/54403-212-0-Max.jpg)](/files/54403.jpg "Mussel seed winning installation")
- [![Mussel seed winning installation (scheme)](/thumbnails/54406-212-0-Max.jpg)](/files/54406.jpg "Mussel seed winning installation (scheme)")
- [![Unio crassus larvae (ca. 0,08 mm)](/thumbnails/54407-212-0-Max.jpg)](/files/54407.jpg "Unio crassus larvae (ca. 0,08 mm)")