Henderson, B.A. and Wong, J.L. and Nepszy, S.J. (1996) Reproduction of walleye in Lake Erie: allocation of energy. Can. J. Fish Aquat. Sci., pp. 127-133
| Species | Development state | Trait | Primary Data | Secondary Data |
| Sander vitreus | Female | Onset of oogenesis | August, mostly in September | ['August', 'September'] |
| Sander vitreus | Female | Intensifying oogenesis activity | Increase regularly from September until March, January ? | ['January', 'February', 'March', 'September', 'October', 'November'] |
| Sander vitreus | Female | Maximum GSI value | Mean of 16, can reach 20-22 [April] | 21.0 percent |
| Sander vitreus | Male | Onset of spermatogenesis | August | ['August'] |
| Sander vitreus | Male | Main spermatogenesis activity | Mostly August-september then remained slowly decreased until March, slight increase | ['March', 'August'] |
| Sander vitreus | Male | Maximum GSI value | 4% in August and also 3.3 in April, prior to spawning | 4.0 percent |