| SeaLifeBase |
| Country | Locality | Absolute Fecundity | Relative Fecundity | Fecundity/length relationship | |||||
| Min | Max | Mean | Min | Max | Mean | a | b | ||
| Ireland | Unspecified, Ireland | 0 | 0 | 0 | 6.2871 | 3.1554 | |||
| Norway | Kvitsøy | 0 | 0 | 0 | 7.4853 | 3.2214 | |||
| UK Scotland | Firth of Forth (estuary) | 2,414 | 17,722 | 0 | |||||
| UK Scotland | Hebrides | 5,431 | 27,725 | 0 | |||||