Makeyeva, A.P. and Belova, N.V. and Emel'yanova, N.G. and Verigin, B.V. and Ryabov, I.N. (1996) Materials on the state of reproductive system of bighead Aristichthys nobilis from the cooling pond of Chernobyl nuclear power station in the post-disaster period. Journal of Ichthyology, pp. 181-189
| Species | Development state | Trait | Primary Data | Secondary Data |
| Aristichthys nobilis | Egg | Oocyte diameter | Average 1.64 [Diameter of the ovulated oocytes] | 1.64 mm |
| Aristichthys nobilis | Egg | Egg size after water-hardening | 5.0-5.2 [Membrane after swelling] | 5.1 mm |
| Aristichthys nobilis | Female | Oocyte development | Low indexes of recorded maturation and of asynchronism in gamete development were characteristic of this species | Asynchronous |
| Aristichthys nobilis | Female | Onset of oogenesis | In autumn and early spring gonads were at III stage of maturation | ['April', 'May', 'June', 'October', 'November', 'December'] |
| Aristichthys nobilis | Female | Intensifying oogenesis activity | At end of April and beginning of May, gonads reached the IV stage of maturation [Gsi about 7-13%] | ['April', 'May'] |
| Aristichthys nobilis | Female | Maximum GSI value | In Fish from Moldova ponds maturation indexes comprised only 6-9%, on other coolers of Ukraine 10-12%. By our observations in ponds in Turmenistan and Uzbekistan this index comprises 11-13% | 7.5 percent |