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| Species | Development state | Trait | Primary Data | Secondary Data |
| Perca fluviatilis | Female | Maximum GSI value | 25 % [April prior to spawning] | 25.0 percent |
| Perca fluviatilis | Female | Oogenesis duration | From august to April : 7-8 months | 7.5 months |
| Perca fluviatilis | Female | Resting period | 3-4 | 3.5 months |
| Perca fluviatilis | Female | Onset of oogenesis | August-September, then increase gradually until mid-March | ['August', 'March', 'September'] |
| Perca fluviatilis | Female | Intensifying oogenesis activity | Beginning of spring, GSI rapidly reached its maximum | ['April', 'May', 'June'] |