Zaytsev, 1987



Citation


No detailed citation.

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Thymallus thymallus Spawning conditions Nycthemeral period of oviposition The maximum number of spawners were caught between 2100 and 2300 h No category
Thymallus thymallus Spawning conditions Spawning substrate Gravel and gravel-boulder substrate serve as spawning grounds Lithophils
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 Female Age at sexual maturity Males mature at age of 3-4 years 3.5 years
Thymallus thymallus Egg Temperature for incubation Mean temperature of incubation is 9.0-10.5°C 9.75 °C
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 Female Absolute fecundity 10-13 [Fecundity varies from 1500 to 28,000 eggs, average 10,000-13,000] 11.5 thousand eggs
Thymallus thymallus Spawning conditions Spawning season The lake grayling spawns during spring, soon after melting of ice ['April', 'May', 'June']
Thymallus thymallus Female Age at sexual maturity Females mature at 4-6 years 5.0 year