Pacoli, C.Q. and Grizzle, J.M. and Bradley, J.T. (1990) Seasonnal levels of serum vittelogenin and ooctye growth in the channel catfish Ictalurus punctatus. Aquaculture, pp. 353-367
| Species | Development state | Trait | Primary Data | Secondary Data |
| Ictalurus punctatus | Egg | Oocyte diameter | Mean of 2.356 ± 0.049 [Oocyte diameter in May] | 2.36 mm |
| Ictalurus punctatus | Female | Onset of oogenesis | Sharp increase in oocyte size in October | ['October'] |
| Ictalurus punctatus | Female | Intensifying oogenesis activity | Second sharp increase of oocyte size from mid-February to May | ['February', 'March', 'April', 'May'] |
| Ictalurus punctatus | Spawning conditions | Spawning period duration | All of the adults that were alive in May spawned naturally during the period from the last week of May to the first week of June | No data |
| Ictalurus punctatus | Spawning conditions | Mating system | Each female was paired with an adult male in a spawning pen | No category |
| Ictalurus punctatus | Spawning conditions | Parity | Only one cycle of oogenesis normally occurs each year | No category |