Knaepkens, G. and Bruyndoncx, L. and Coeck, J. and Eens, M. (2004) Spawning habitat enhancement in the European bullhead (Cottus gobio), an endangered freshwater fish in degraded lowland rivers. Biodiversity and Conservation, pp. 2443-2452
| Species | Development state | Trait | Primary Data | Secondary Data |
| Cottus gobio | Spawning conditions | Spawning migration distance | During the spawning season, the proportion of fish that movedand the distances travelled(SPB: between 10 and 90, mean 26 +/- 3m; LB: between 30 and 260 m,mean 133 +/-3 m) were significantly larger | 26.0 km |
| Cottus gobio | Spawning conditions | Spawning site preparation | It uses cavities underneath stones for nesting. The ripe female enter the male's nest and lays her eggs on the ceiling | No category |