Gorbach, E.I. (1972) Fecundity of the grass carp (Ctenopharyngodon idella Val.) in the Amur Basin. J. Ichthyol., pp. 616-625
| Species | Development state | Trait | Primary Data | Secondary Data |
| Ctenopharyngodon idella | Female | Age at sexual maturity | The grass carp investigated for fecundity were between 7+ and 15+ | 7.0 year |
| Ctenopharyngodon idella | Female | Length at sexual maturity | The grass carp investigated for fecundity were between 66 and 96 cm | 96.0 cm |
| Ctenopharyngodon idella | Female | Weight at sexual maturity | The grass carp investigated for fecundity were between 5,050 and 16,400 g in weight | 5.0 kg |
| Ctenopharyngodon idella | Female | Relative fecundity | The relative fecundity of the grass carp varies in the range 48-177 eggs, on average 110 eggs per g of body weight less the viscera | 112.5 thousand eggs/kg |
| Ctenopharyngodon idella | Female | Absolute fecundity | The mean absolute fecundity over the entire period of the investigation (1963-1969) was approximatively 820 thousand eggs. The lowest fecundity (237 000) was recorded in a female of 7+, 67.5 cm long, and the highest (1687 000) in a female of 16+, 96 cm long. The bilk of the females (approximatively 90%) had a fecundity of from 600 to 1150 thousand eggs | 1966.0 thousand eggs |
| Ctenopharyngodon idella | Female | Oocyte development | Asynchronous and synchronous development of oocytes was also noted. The oocyte development characteristics are determined by the conditions under which the fish are reared | Asynchronous |
| Ctenopharyngodon idella | Spawning conditions | Spawning release | Intermittent spawner in the Amur basin. When the absolute fecundity of 90 females was depicted the curve was clearly two-peaked for 82 females (91%) and had one perka for only eigth females (9%); the latter females should be classified as fish which lay all their eggs on a single occassion. The size of the first batch of eggs in females in which the sizes of yolk ooctyes had a two-peaked curve ranged from 55 to 91.5% and was on average 67% of absolute fecundity | Multiple |