Kesminas, V. and Virbickas, T. and Stakenas, S. (1999) The state and morphological characteristics of Vimba (Vimba vimba L.) subpopulation in the middle nemunas. Acta zoologica Lituanica, pp. 147-154
| Species | Development state | Trait | Primary Data | Secondary Data |
| Vimba vimba | Female | Age at sexual maturity | females become mature at the age 6. A common age of spawning vimba is 6-7 years | 6.5 year |
| Vimba vimba | Female | Length at sexual maturity | Migrating females are 28-30 cm long. A common size is 25.5-29.6 cm | 29.0 cm |
| Vimba vimba | Female | Weight at sexual maturity | A common weight for both sex is 331-408 g | 369.5 kg |
| Vimba vimba | Male | Age at sexual maturity | Males become mature at the age 5. A common age of spawning vimba is 6-7 years | 6.5 years |
| Vimba vimba | Male | Length at sexual maturity | Males migrating are 24.8-28.0 cm long | 26.4 cm |
| Vimba vimba | Spawning conditions | Spawning migration distance | Until Kaunas hydroelectric power station was built, vimba used to migrate along the Nemunas to Stolbcai town (Belarus), which made 850 km from the river mouth. After Kaunas HPS dam was built and when transferring and marking of vimba reproducers was started, it was determined that the furthest distance of their migration reached 500 km, which was a bit shorter than before the dam building | 850.0 km |
| Vimba vimba | Spawning conditions | Spawning water type | There is the largest number of vimba spawning grounds in this part of the river. For instance, one of the major factors, the average velocity of the flow in the Middle Nemunas fluctuates from 0.7 to 0.9 m/s and there are plenty of shallow gravelled segments of the riverbed there | Flowing or turbulent water |
| Vimba vimba | Spawning conditions | Spawning depth | Shallow gravelled segments of the riverbed there | No data |
| Vimba vimba | Spawning conditions | Spawning substrate | Gravelled segments of the riverbed | Lithophils |