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ijsselmeer
lake ijssel
3
fisheries
2
migratie
2
migration
2
nederland
2
netherlands
2
visserij
2
Lake IJsselmeer
1
Rhine
1
Salmo salar
1
anguilla
1
atlantic salmon
1
birds
1
distributie
1
distribution
1
duurzaamheid (sustainability)
1
eels
1
europa
1
europe
1
european eels
1
europese zalm
1
fish
1
fish catches
1
fish stocks
1
fishery biology
1
fishery management
1
fishery resources
1
geografische verdeling
1
geographical distribution
1
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