No detailed citation.
| Species | Development state | Trait | Primary Data | Secondary Data |
| Alosa fallax | Spawning conditions | Spawning migration period | Pre-spawning adult enter the Sever, estuary at the start of the freswater phase of their spawning migration, between mid-April and mid-June; peak migration generally occurs in May. The timing of their movement into the estuary appears related to temperature, peak immigration occuring at temperature rangin between 10.6 and 12.3°C | ['April', 'May', 'June'] |