Borg, B. and Van Veen, T. (1982) Seasonal effects of photoperiod and temperature on the ovary of the three-spined stickleback, Gasterosteus aculeatus L. Can. J. Zool., pp. 3387-3393
| Species | Development state | Trait | Primary Data | Secondary Data |
| Gasterosteus aculeatus | Female | Oocyte development | Simultaneous development of batches of eggs | Synchronous |
| Gasterosteus aculeatus | Female | Onset of oogenesis | Slight increase in October-November [Relative ovarian weights are low in autum and early spring] | ['April', 'May', 'June', 'October', 'November'] |
| Gasterosteus aculeatus | Female | Intensifying oogenesis activity | May | ['May'] |
| Gasterosteus aculeatus | Female | Maximum GSI value | Mean of 22; up to 25% [In June] | 22.0 percent |
| Gasterosteus aculeatus | Female | Resting period | After the breeding season the weights decrease until the lowest level is attained in October | 2.0 months |
| Gasterosteus aculeatus | Spawning conditions | Spawning season | The breeding season is in late spring-summer | ['April', 'May', 'June', 'July', 'August', 'September'] |