Sokolowska, E. and Skora, K.E. (2002) Reproductive cycle and the related spatial and temporal distribution of the ninespine stickleback (Pungitius pungitius L.) in Puck Bay. Oceanologia, pp. 475-490
| Species | Development state | Trait | Primary Data | Secondary Data |
| Pungitius pungitius | Female | Onset of oogenesis | Based on GSI graph, slight increase between August and September and another between November and December | ['August', 'September', 'November', 'December'] |
| Pungitius pungitius | Female | Intensifying oogenesis activity | Based on GSI graph, from April until July (during the spawning season) | ['April', 'May', 'June', 'July'] |
| Pungitius pungitius | Female | Maximum GSI value | In females, the ovaries wan make up as much as 20% of the total weight during the reproductive period | 20.0 percent |
| Pungitius pungitius | Female | Resting period | Based on GSI graph, in August and perhaps until november | 2.0 months |
| Pungitius pungitius | Male | Onset of spermatogenesis | Early spermatogenetic stages, e.g. spermatogonia and spermatocytes began to dominate after spawning in August | ['August'] |
| Pungitius pungitius | Male | Onset of spermatogenesis | Based on GSI graph: strong increase between July and August and then remained relativelt constant | ['July', 'August'] |
| Pungitius pungitius | Male | Main spermatogenesis activity | Based on GSI graph: strong increase between July and August and then remained relativelt constant | ['July', 'August'] |
| Pungitius pungitius | Male | Maximum GSI value | Based on GSI graph: 1.0 in February | 1.0 percent |
| Pungitius pungitius | Spawning conditions | Spawning season | The breeding season in the Bay begins at the end of April and ends in July | ['April', 'July'] |
| Pungitius pungitius | Spawning conditions | Spawning period duration | The females were able to spawn for almost four months of the year in Puck Bay | No data |
| Pungitius pungitius | Spawning conditions | Spawning release | The presence of partly spent females shows that spawning in this species is portioned: a female can spawn several times during one breeding season. After one clutch of eggs has been laid in the nest the next batch of oocytes begins to mature in the ovaries | Multiple |
| Pungitius pungitius | Spawning conditions | Parental care | The fry remain close to the males and do not swim far from the nest | No care |