No detailed citation.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Thymallus thymallus | Egg | Temperature for incubation | Mean temperature of incubation is 9.0-10.5°C | 9.75 °C |
| Thymallus thymallus | Female | Age at sexual maturity | Females mature at 4-6 years | 5.0 year |
| Thymallus thymallus | Female | Absolute fecundity | 10-13 [Fecundity varies from 1500 to 28,000 eggs, average 10,000-13,000] | 11.5 thousand eggs |
| Thymallus thymallus | Male | Age at sexual maturity | Males mature at age of 3-4 years | 3.5 years |
| Thymallus thymallus | Spawning conditions | Spawning migration period | Mass migration of graylingto spawning grounds takes place only in calm windless weather when the water temperature reaches 3°C (daily fluctuations 2.3-3.9°C) and continues 1-2 days. In case of warming of the water masses along with constant intermixing due to wind, the spawning is delayed and takes place under more favorable conditions (absence of waves) and at a higher temperature. In such cases, the spawning is significantly extended, and the intervals between individual arrivals of spawners is 10-12 days | No data |
| Thymallus thymallus | Spawning conditions | Spawning season | The lake grayling spawns during spring, soon after melting of ice | ['April', 'May', 'June'] |
| Thymallus thymallus | Spawning conditions | Spawning temperature | The maximum water temperature at which spawning takes place is 8-9°C, further increase in temperature leads to resorption of the sex products | 8.5 °C |
| Thymallus thymallus | Spawning conditions | Spawning water type | The coastal shoals, and offshore bars with gravel and gravel-boulder substrate serve as spawning grounds. As a rule, these parts have the most intensive circulation of water masses. | Stagnant water |
| Thymallus thymallus | Spawning conditions | Spawning depth | In the net catches from different depths (0.2-10.0 m), most fish with flowing sex products were caught from depth of 0.2-1.5 m, between 1600 and 2400 h | 5.1 m |
| Thymallus thymallus | Spawning conditions | Spawning substrate | Gravel and gravel-boulder substrate serve as spawning grounds | Lithophils |
| Thymallus thymallus | Spawning conditions | Nycthemeral period of oviposition | The maximum number of spawners were caught between 2100 and 2300 h | No category |