Vollestad, L.A. and Jonsson, B. (1986) Life-history characteristics of the European Eel Anguilla anguilla in the Imsa River, Norway. Transactions of the American Fisheries Society, pp. 864-871
| Species | Development state | Trait | Primary Data | Secondary Data |
| Anguilla anguilla | Female | Age at sexual maturity | Mean age about 7, range 3.4-12.3, means in various locations | 7.85 year |
| Anguilla anguilla | Female | Length at sexual maturity | Mean 61, range 39.0-105 [Female, n=1145] | 72.0 cm |
| Anguilla anguilla | Female | Weight at sexual maturity | Mean 0.425, range 0.130-2.105 [Female, n=1145] | 1.12 kg |
| Anguilla anguilla | Female | Female sexual dimorphism | Females are larger than males | Absent |
| Anguilla anguilla | Female | Maximum GSI value | About 50% in artificial conditions | 50.0 percent |
| Anguilla anguilla | Male | Age at sexual maturity | Mean age about 5, range 2.5-9.1, means in various locations | 5.8 years |
| Anguilla anguilla | Male | Length at sexual maturity | Mean 41, range 32.5-45 [Female, n=75] | 38.75 cm |
| Anguilla anguilla | Male | Weight at sexual maturity | Mean 0.107, range 0.028-0.162 [Female, n=75] | 0.1 kg |
| Anguilla anguilla | Male | Maximum GSI value | Gonad weight of mature males only constitutes, at most 14% of the body weight | 14.0 percent |
| Anguilla anguilla | Spawning conditions | Spawning water type | Sargasso sea | No category |
| Anguilla anguilla | Spawning conditions | Spawning depth | Spawning probably occurs at great depths | No data |
| Anguilla anguilla | Spawning conditions | Spawning release | Each female probably spawns intermittently with several males each time | Multiple |