No detailed citation.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Thymallus thymallus | Spawning conditions | Spawning season | Can occur between 23 to 26 March and from 1 to 3 April | ['March', 'April'] |
| Thymallus thymallus | Spawning conditions | Spawning temperature | 8 | 8.0 °C |
| Thymallus thymallus | Spawning conditions | Spawning water type | Water velocities: about 20cm/s | Flowing or turbulent water |
| Thymallus thymallus | Spawning conditions | Spawning depth | Water depth 30-40 cm [Sometimes up to 88 cm] | 35.0 m |
| Thymallus thymallus | Spawning conditions | Spawning substrate | Clean 1-3 cm gravel | Lithophils |
| Thymallus thymallus | Spawning conditions | Spawning site preparation | Biggest grayling was strougly territorial, other males did not appear to defend territories | No category |
| Thymallus thymallus | Spawning conditions | Nycthemeral period of oviposition | The intensity of the spawning reached its maximum at the beginning of the afternoon, when the temperature increase | Day |
| Thymallus thymallus | Spawning conditions | Mating system | Most by pair, 2 out of 55 included two males with one female | Monogamy |