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