11. This shows what could happen to migratory fish such as the Jullien s golden carp. 12. By 1940, the dam had deteriorated to the point that it no longer blocked migratory fish . 13. Other migratory fish are known to have used the Savick Brook to reach their spawning grounds. 14. At present, 8 of the 12 migratory fish ( found in Belgium's rivers ) are threatened. 15. He said the proposed UN Convention on Straddling and Highly Migratory Fish Stocks would solve that. 16. There are notably seven species of migratory fish which pass through the estuary in both directions. 17. It applies to migratory fish and fish that straddle between the high seas and national boundaries. 18. This presents a barrier to migratory fish . 19. Environmentalists have warned that it could doom migratory fish , concentrate water pollution and wipe out rare plants. 20. Furthermore, the natural flow of migratory fish was obstructed and biodiversity across the whole basin decreased dramatically.
