Kobayashi, M. and Aida, K. and Hanyu, I. (1986) Annual changes in plasma levels of gonadotropin and steroid homornes in goldfish. Bull. Jpn. Soc. Sci. Fish., pp. 1153-1158.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Carassius auratus | Female | Onset of oogenesis | GSI gradually increased from August to February (From 2.0 ±0.2 to 3.7 ±0.5) | ['January', 'February', 'August', 'September', 'October', 'November'] |
| Carassius auratus | Female | Intensifying oogenesis activity | GSI rapidly increased in April (6.4 ± 1.0) | ['April'] |
| Carassius auratus | Female | Maximum GSI value | 10.5 ± 1.2 (May) | 10.5 percent |
| Carassius auratus | Female | Resting period | August | 2.0 months |
| Carassius auratus | Female | Resting period | 1.0 ± [August] | 1.0 months |
| Carassius auratus | Male | Maximum GSI value | 3.2 ±0.4 [May] | 3.2 percent |
| Carassius auratus | Male | Resting period | 0.3 ± 0.1 [August, but a large increased was oberseved in the Autum: about 4%)] | 2.0 months |
| Carassius auratus | Spawning conditions | Spawning season | May 1 until June 9 | ['May', 'June'] |
| Carassius auratus | Spawning conditions | Spawning period duration | 4-5 | 4.5 weeks |