Collares-Pereira, M.J. and Cowx, I.G. and Sales Luis, T. and Pedrosa, N. and Santos-Reis, M. (1999) Observations on the ecology of a landlocked population of allis shad in Aguieira reservoir, Portugal. Journal of fish biology, pp. 658-664
| Species | Development state | Trait | Primary Data | Secondary Data |
| Alosa alosa | Female | Maximum GSI value | Calculated based on Table 1. Around 18-20% in April-May | 19.0 percent |