Whitehead, C. and Bromage, N. and Forster, J.R.M. and Matty, A.J. (1978) The effects of alterations in photoperiod on ovarian development and spawing time in the rainbow trout (Salmo gairdeni). Ann. Biol. Anim. Biochm. Biophys., pp. 1035-1043
| Species | Development state | Trait | Primary Data | Secondary Data |
| Oncorhynchus mykiss | Egg | Oocyte diameter | 4.7 ± 0.2 | 4.7 mm |
| Oncorhynchus mykiss | Female | Relative fecundity | 2.0 | 2.0 thousand eggs/kg |