Brauhn, J. and McCraren, J. (1975) Ovary maturation in channel catfish. The progressive Fish-culturist, pp. 209-212
| Species | Development state | Trait | Primary Data | Secondary Data |
| Ictalurus punctatus | Female | Onset of oogenesis | The average GSI increases in midwinter, in November | ['January', 'February', 'March', 'November'] |
| Ictalurus punctatus | Female | Intensifying oogenesis activity | June | ['June'] |
| Ictalurus punctatus | Female | Maximum GSI value | Mean of 13.8, range 11.0-19.35 [1 July] | 15.18 percent |
| Ictalurus punctatus | Female | Resting period | An apparent low point in the annual ovarian cycle was reached immediatly after spawning | No data |