Cowx, G. (1983) The biology of bream, Abramis brama (L), and its natural hybrid with roach, Rutilus rutilus (L), in the river Exe. J. Fish Biol., pp. 631-646
| Species | Development state | Trait | Primary Data | Secondary Data |
| Abramis brama | Female | Age at sexual maturity | Female bream attain maturity in their sixth year of life (V+) | 6.0 year |
| Abramis brama | Female | Length at sexual maturity | Mean of 26.4 [Fork length] | 26.4 cm |
| Abramis brama | Male | Age at sexual maturity | Male attain maturity in their seventh year (VI+) | 7.0 years |
| Abramis brama | Male | Length at sexual maturity | 27.7 [Fork length] | 27.7 cm |