Chereshnev, I.A. and Shestakov, A.V. and Yusupov, R.R. and Shtundyuk, Yu.V. and Slugin, I.V. (2000) Biology of nelma Stenodus leucichthys nelma (Coregonidae) from the Anadyr Basin (the Northeast of Russia). Journal of Ichthyology, pp. 457-470
Species | Development state | Trait | Primary Data | Secondary Data |
Stenodus leucichthys | Egg | Incubation time | 250-260 | 255.0 days |
Stenodus leucichthys | Larvae | Initial larval size | Average 13.2, range 12.6-14.3 | 13.45 mm |
Stenodus leucichthys | Female | Age at sexual maturity | Mass maturation for females at 10-12 [But could be as early as 8] | 11.0 year |
Stenodus leucichthys | Female | Length at sexual maturity | Mass maturation for females at 70-75 [But could be as 66.2] | 72.5 cm |
Stenodus leucichthys | Female | Weight at sexual maturity | Mass maturation for females at 4.0-5.0 [But could be 2.53] | 4.5 kg |
Stenodus leucichthys | Female | Relative fecundity | 18-35 eggs per 1 g of body weight, not viscera. Also described that the absolute fecundity ranges from 80000 to 420000, for female ranging from means of 3.35 [At 11 years old] to 9.74 [At 17 years old] | 26.5 thousand eggs/kg |
Stenodus leucichthys | Female | Absolute fecundity | 80-420 | 250.0 thousand eggs |
Stenodus leucichthys | Female | Intensifying oogenesis activity | July-August [From 7.8% to 18.3%] | ['July', 'August'] |
Stenodus leucichthys | Female | Maximum GSI value | Mean 18.3 but up to 23.5 [First ten day period of August] | 18.3 percent |
Stenodus leucichthys | Male | Age at sexual maturity | Mass maturation for males at 9-11 [But could be as early as 7] | 10.0 years |
Stenodus leucichthys | Male | Length at sexual maturity | Mass maturation for males at 65-70 [But could be as 54.0] | 67.5 cm |
Stenodus leucichthys | Male | Weight at sexual maturity | Mass maturation for females at 2.0-3.5 [But could be 1.47] | 2.75 kg |
Stenodus leucichthys | Spawning conditions | Spawning migration period | The prespawning nelma begins migration to its spawning grounds before the ice drift, the mass migration is observed in the first half of June | ['June'] |
Stenodus leucichthys | Spawning conditions | Spawning season | Mass spawning of nelma begins in middle to late September | ['September'] |
Stenodus leucichthys | Spawning conditions | Spawning temperature | 3-6°C | 4.5 °C |
Stenodus leucichthys | Spawning conditions | Spawning water type | Wide areas | No category |
Stenodus leucichthys | Spawning conditions | Spawning depth | Depth 2-3 m | 2.5 m |
Stenodus leucichthys | Spawning conditions | Spawning substrate | Sandy-pebbly bottom | Psammophils |